hxt-8.0.0: doc/hdoc/src/Text-XML-HXT-Validator-DocValidation.html
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<pre><a name="line-1"></a><span class='comment'>-- |</span>
<a name="line-2"></a><span class='comment'>-- This module provides functions for validating XML Documents represented as</span>
<a name="line-3"></a><span class='comment'>-- XmlTree.</span>
<a name="line-4"></a>
<a name="line-5"></a><span class='comment'>-- Unlike other popular XML validation tools the validation process returns</span>
<a name="line-6"></a><span class='comment'>-- a list of errors instead of aborting after the first error was found.</span>
<a name="line-7"></a>
<a name="line-8"></a>
<a name="line-9"></a><span class='comment'>-- Before the document is validated, a lookup-table is build on the basis of</span>
<a name="line-10"></a><span class='comment'>-- the DTD which maps element names to their validation functions.</span>
<a name="line-11"></a><span class='comment'>-- After this initialization phase the whole document is traversed in preorder</span>
<a name="line-12"></a><span class='comment'>-- and every element is validated by the XmlFilter from the lookup-table.</span>
<a name="line-13"></a>
<a name="line-14"></a><span class='comment'>-- Special namings in source code:</span>
<a name="line-15"></a><span class='comment'>--</span>
<a name="line-16"></a><span class='comment'>-- - nd - XDTD node</span>
<a name="line-17"></a><span class='comment'>--</span>
<a name="line-18"></a><span class='comment'>-- - n - XTag node</span>
<a name="line-19"></a><span class='comment'>--</span>
<a name="line-20"></a><span class='comment'>-- Author : .\\artin Schmidt</span>
<a name="line-21"></a><span class='comment'>-- Version : $Id: DocValidation.hs,v 1.1 2004/09/02 19:12:03 hxml Exp $</span>
<a name="line-22"></a>
<a name="line-23"></a><span class='keyword'>module</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Validator</span><span class='varop'>.</span><span class='conid'>DocValidation</span>
<a name="line-24"></a> <span class='layout'>(</span> <span class='varid'>validateDoc</span>
<a name="line-25"></a> <span class='layout'>)</span>
<a name="line-26"></a><span class='keyword'>where</span>
<a name="line-27"></a>
<a name="line-28"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>DOM</span><span class='varop'>.</span><span class='conid'>XmlTree</span>
<a name="line-29"></a>
<a name="line-30"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Validator</span><span class='varop'>.</span><span class='conid'>AttributeValueValidation</span>
<a name="line-31"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Validator</span><span class='varop'>.</span><span class='conid'>XmlRE</span>
<a name="line-32"></a>
<a name="line-33"></a><span class='keyword'>import</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>Maybe</span>
<a name="line-34"></a>
<a name="line-35"></a><span class='comment'>-- |</span>
<a name="line-36"></a><span class='comment'>-- Lookup-table which maps element names to their validation functions. The</span>
<a name="line-37"></a><span class='comment'>-- validation functions are XmlFilters.</span>
<a name="line-38"></a>
<a name="line-39"></a><a name="ValiEnvTable"></a><span class='keyword'>type</span> <span class='conid'>ValiEnvTable</span> <span class='keyglyph'>=</span> <span class='keyglyph'>[</span><span class='conid'>ValiEnv</span><span class='keyglyph'>]</span>
<a name="line-40"></a><a name="ValiEnv"></a><span class='keyword'>type</span> <span class='conid'>ValiEnv</span> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='conid'>ElemName</span><span class='layout'>,</span> <span class='conid'>ValFct</span><span class='layout'>)</span>
<a name="line-41"></a><a name="ElemName"></a><span class='keyword'>type</span> <span class='conid'>ElemName</span> <span class='keyglyph'>=</span> <span class='conid'>String</span>
<a name="line-42"></a><a name="ValFct"></a><span class='keyword'>type</span> <span class='conid'>ValFct</span> <span class='keyglyph'>=</span> <span class='conid'>XmlFilter</span>
<a name="line-43"></a>
<a name="line-44"></a>
<a name="line-45"></a>
<a name="line-46"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-47"></a>
<a name="line-48"></a>
<a name="line-49"></a><span class='comment'>-- |</span>
<a name="line-50"></a><span class='comment'>-- Validate a document.</span>
<a name="line-51"></a><span class='comment'>--</span>
<a name="line-52"></a><span class='comment'>-- * 1.parameter dtdPart : the DTD subset (Node @DOCTYPE@) of the XmlTree</span>
<a name="line-53"></a><span class='comment'>--</span>
<a name="line-54"></a><span class='comment'>-- - 2.parameter doc : the document subset of the XmlTree</span>
<a name="line-55"></a><span class='comment'>--</span>
<a name="line-56"></a><span class='comment'>-- - returns : a list of errors</span>
<a name="line-57"></a>
<a name="line-58"></a><a name="validateDoc"></a><span class='definition'>validateDoc</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTrees</span>
<a name="line-59"></a><span class='definition'>validateDoc</span> <span class='varid'>dtdPart</span> <span class='varid'>doc</span>
<a name="line-60"></a> <span class='keyglyph'>=</span> <span class='varid'>traverseTree</span> <span class='varid'>valTable</span> <span class='varid'>doc</span>
<a name="line-61"></a> <span class='keyword'>where</span>
<a name="line-62"></a> <span class='varid'>valTable</span> <span class='keyglyph'>=</span> <span class='comment'>{-# SCC "buildAllValFcts" #-}</span> <span class='varid'>buildAllValidationFunctions</span> <span class='varid'>dtdPart</span>
<a name="line-63"></a>
<a name="line-64"></a>
<a name="line-65"></a><span class='comment'>-- |</span>
<a name="line-66"></a><span class='comment'>-- Traverse the XmlTree in preorder.</span>
<a name="line-67"></a><span class='comment'>--</span>
<a name="line-68"></a><span class='comment'>-- * 1.parameter valiEnv : lookup-table which maps element names to their validation functions</span>
<a name="line-69"></a><span class='comment'>--</span>
<a name="line-70"></a><span class='comment'>-- - returns : list of errors</span>
<a name="line-71"></a>
<a name="line-72"></a><a name="traverseTree"></a><span class='definition'>traverseTree</span> <span class='keyglyph'>::</span> <span class='conid'>ValiEnvTable</span> <span class='keyglyph'>-></span> <span class='conid'>XmlFilter</span>
<a name="line-73"></a><span class='definition'>traverseTree</span> <span class='varid'>valiEnv</span> <span class='varid'>n</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XTag</span> <span class='varid'>name</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='varid'>cs</span><span class='layout'>)</span>
<a name="line-74"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='varid'>valFct</span> <span class='varid'>n</span><span class='layout'>)</span> <span class='varop'>++</span> <span class='varid'>concatMap</span> <span class='layout'>(</span><span class='varid'>traverseTree</span> <span class='varid'>valiEnv</span><span class='layout'>)</span> <span class='varid'>cs</span>
<a name="line-75"></a> <span class='keyword'>where</span>
<a name="line-76"></a> <span class='varid'>valFct</span> <span class='keyglyph'>::</span> <span class='conid'>XmlFilter</span>
<a name="line-77"></a> <span class='varid'>valFct</span>
<a name="line-78"></a> <span class='keyglyph'>=</span> <span class='keyword'>case</span> <span class='layout'>(</span><span class='varid'>lookup</span> <span class='layout'>(</span><span class='varid'>qualifiedName</span> <span class='varid'>name</span><span class='layout'>)</span> <span class='varid'>valiEnv</span><span class='layout'>)</span> <span class='keyword'>of</span>
<a name="line-79"></a> <span class='conid'>Nothing</span> <span class='keyglyph'>-></span> <span class='varid'>err</span> <span class='layout'>(</span><span class='str'>"Element "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>qualifiedName</span> <span class='varid'>name</span><span class='layout'>)</span> <span class='varop'>++</span> <span class='str'>" not declared in DTD."</span><span class='layout'>)</span>
<a name="line-80"></a> <span class='conid'>Just</span> <span class='varid'>f</span> <span class='keyglyph'>-></span> <span class='varid'>f</span>
<a name="line-81"></a>
<a name="line-82"></a><span class='definition'>traverseTree</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>[]</span>
<a name="line-83"></a>
<a name="line-84"></a>
<a name="line-85"></a>
<a name="line-86"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-87"></a>
<a name="line-88"></a>
<a name="line-89"></a><span class='comment'>-- |</span>
<a name="line-90"></a><span class='comment'>-- Build all validation functions.</span>
<a name="line-91"></a><span class='comment'>--</span>
<a name="line-92"></a><span class='comment'>-- * 1.parameter dtdPart : DTD subset, root node should be of type @DOCTYPE@</span>
<a name="line-93"></a><span class='comment'>--</span>
<a name="line-94"></a><span class='comment'>-- - returns : lookup-table which maps element names to their validation functions</span>
<a name="line-95"></a>
<a name="line-96"></a><a name="buildAllValidationFunctions"></a><span class='definition'>buildAllValidationFunctions</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>ValiEnvTable</span>
<a name="line-97"></a><span class='definition'>buildAllValidationFunctions</span> <span class='varid'>dtdPart</span>
<a name="line-98"></a> <span class='keyglyph'>=</span> <span class='varid'>buildValidateRoot</span> <span class='varid'>dtdPart</span>
<a name="line-99"></a> <span class='conop'>:</span>
<a name="line-100"></a> <span class='comment'>-- construct a list of validation filters for all element declarations</span>
<a name="line-101"></a> <span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>buildValidateFunctions</span> <span class='varid'>dtdNodes</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>isElement</span> <span class='varop'>$$</span> <span class='varid'>dtdNodes</span><span class='layout'>)</span>
<a name="line-102"></a> <span class='keyword'>where</span>
<a name="line-103"></a> <span class='varid'>dtdNodes</span> <span class='keyglyph'>=</span> <span class='varid'>getChildren</span> <span class='varid'>dtdPart</span>
<a name="line-104"></a>
<a name="line-105"></a>
<a name="line-106"></a><span class='comment'>-- |</span>
<a name="line-107"></a><span class='comment'>-- Build a validation function for the document root. By root node @\/@</span>
<a name="line-108"></a><span class='comment'>-- is meant, which is the topmost dummy created by the parser.</span>
<a name="line-109"></a><span class='comment'>--</span>
<a name="line-110"></a><span class='comment'>-- * 1.parameter dtdPart : DTD subset, root node should be of type @DOCTYPE@</span>
<a name="line-111"></a><span class='comment'>--</span>
<a name="line-112"></a><span class='comment'>-- - returns : entry for the lookup-table</span>
<a name="line-113"></a>
<a name="line-114"></a><a name="buildValidateRoot"></a><span class='definition'>buildValidateRoot</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>ValiEnv</span>
<a name="line-115"></a><span class='definition'>buildValidateRoot</span> <span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XDTD</span> <span class='conid'>DOCTYPE</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span>
<a name="line-116"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='varid'>t_root</span><span class='layout'>,</span> <span class='varid'>valFct</span><span class='layout'>)</span>
<a name="line-117"></a> <span class='keyword'>where</span>
<a name="line-118"></a> <span class='varid'>name</span> <span class='keyglyph'>=</span> <span class='varid'>lookup1</span> <span class='varid'>a_name</span> <span class='varid'>al</span>
<a name="line-119"></a>
<a name="line-120"></a> <span class='varid'>valFct</span> <span class='keyglyph'>::</span> <span class='conid'>XmlFilter</span>
<a name="line-121"></a> <span class='varid'>valFct</span> <span class='varid'>nd</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XTag</span> <span class='keyword'>_</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='varid'>cs</span><span class='layout'>)</span>
<a name="line-122"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>msg</span> <span class='varop'>==</span> <span class='str'>""</span>
<a name="line-123"></a> <span class='keyword'>then</span> <span class='conid'>[]</span>
<a name="line-124"></a> <span class='keyword'>else</span> <span class='varid'>err</span> <span class='layout'>(</span><span class='str'>"Root Element must be "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>name</span> <span class='varop'>++</span> <span class='str'>". "</span> <span class='varop'>++</span> <span class='varid'>msg</span><span class='layout'>)</span> <span class='varid'>nd</span>
<a name="line-125"></a> <span class='keyword'>where</span>
<a name="line-126"></a> <span class='varid'>re</span> <span class='keyglyph'>=</span> <span class='varid'>re_sym</span> <span class='layout'>(</span><span class='varid'>name</span><span class='layout'>)</span>
<a name="line-127"></a> <span class='varid'>msg</span> <span class='keyglyph'>=</span> <span class='varid'>checkRE</span> <span class='layout'>(</span><span class='varid'>matches</span> <span class='varid'>re</span> <span class='varid'>cs</span><span class='layout'>)</span>
<a name="line-128"></a>
<a name="line-129"></a> <span class='varid'>valFct</span> <span class='varid'>n</span> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"buildValidateRoot: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-130"></a>
<a name="line-131"></a><span class='definition'>buildValidateRoot</span> <span class='varid'>nd</span>
<a name="line-132"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"buildValidateRoot: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>nd</span><span class='layout'>)</span>
<a name="line-133"></a>
<a name="line-134"></a>
<a name="line-135"></a><span class='comment'>-- |</span>
<a name="line-136"></a><span class='comment'>-- Build validation functions for an element.</span>
<a name="line-137"></a><span class='comment'>--</span>
<a name="line-138"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-139"></a><span class='comment'>--</span>
<a name="line-140"></a><span class='comment'>-- - 2.parameter nd : element declaration for which the validation functions are</span>
<a name="line-141"></a><span class='comment'>-- created</span>
<a name="line-142"></a><span class='comment'>--</span>
<a name="line-143"></a><span class='comment'>-- - returns : entry for the lookup-table</span>
<a name="line-144"></a>
<a name="line-145"></a><a name="buildValidateFunctions"></a><span class='definition'>buildValidateFunctions</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>ValiEnv</span>
<a name="line-146"></a>
<a name="line-147"></a><span class='definition'>buildValidateFunctions</span> <span class='varid'>dtdPart</span> <span class='varid'>nd</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XDTD</span> <span class='conid'>ELEMENT</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span>
<a name="line-148"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='varid'>elemName</span><span class='layout'>,</span> <span class='varid'>valFct</span><span class='layout'>)</span>
<a name="line-149"></a> <span class='keyword'>where</span>
<a name="line-150"></a> <span class='varid'>elemName</span> <span class='keyglyph'>=</span> <span class='varid'>lookup1</span> <span class='varid'>a_name</span> <span class='varid'>al</span>
<a name="line-151"></a>
<a name="line-152"></a> <span class='varid'>valFct</span> <span class='keyglyph'>::</span> <span class='conid'>XmlFilter</span>
<a name="line-153"></a> <span class='varid'>valFct</span> <span class='keyglyph'>=</span> <span class='varid'>buildContentValidation</span> <span class='varid'>nd</span>
<a name="line-154"></a> <span class='varop'>+++</span>
<a name="line-155"></a> <span class='varid'>buildAttributeValidation</span> <span class='varid'>dtdPart</span> <span class='varid'>nd</span>
<a name="line-156"></a>
<a name="line-157"></a><span class='definition'>buildValidateFunctions</span> <span class='keyword'>_</span> <span class='varid'>nd</span>
<a name="line-158"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"buildValidateFunctions: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>nd</span><span class='layout'>)</span>
<a name="line-159"></a>
<a name="line-160"></a>
<a name="line-161"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-162"></a>
<a name="line-163"></a>
<a name="line-164"></a><span class='comment'>-- |</span>
<a name="line-165"></a><span class='comment'>-- Build validation functions for the content model of an element.</span>
<a name="line-166"></a><span class='comment'>-- Validity constraint: Element Valid (3 \/ p.18 in Spec)</span>
<a name="line-167"></a><span class='comment'>--</span>
<a name="line-168"></a><span class='comment'>-- * 1.parameter nd : element declaration for which the content validation functions</span>
<a name="line-169"></a><span class='comment'>-- are built</span>
<a name="line-170"></a><span class='comment'>--</span>
<a name="line-171"></a><span class='comment'>-- - returns : a function which takes an element (XTag), checks if its</span>
<a name="line-172"></a><span class='comment'>-- children match its content model and returns a list of errors</span>
<a name="line-173"></a>
<a name="line-174"></a><a name="buildContentValidation"></a><span class='definition'>buildContentValidation</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlFilter</span>
<a name="line-175"></a><span class='definition'>buildContentValidation</span> <span class='varid'>nd</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XDTD</span> <span class='conid'>ELEMENT</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span>
<a name="line-176"></a> <span class='keyglyph'>=</span> <span class='varid'>contentValidation</span> <span class='varid'>attrType</span> <span class='varid'>nd</span>
<a name="line-177"></a> <span class='keyword'>where</span>
<a name="line-178"></a> <span class='varid'>attrType</span> <span class='keyglyph'>=</span> <span class='varid'>lookup1</span> <span class='varid'>a_type</span> <span class='varid'>al</span>
<a name="line-179"></a>
<a name="line-180"></a>
<a name="line-181"></a> <span class='comment'>-- Delegates construction of the validation function on the basis of the</span>
<a name="line-182"></a> <span class='comment'>-- content model type</span>
<a name="line-183"></a> <span class='varid'>contentValidation</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlFilter</span>
<a name="line-184"></a> <span class='varid'>contentValidation</span> <span class='varid'>typ</span> <span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XDTD</span> <span class='conid'>ELEMENT</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='varid'>cs</span><span class='layout'>)</span>
<a name="line-185"></a> <span class='keyglyph'>|</span> <span class='varid'>typ</span> <span class='varop'>==</span> <span class='varid'>k_pcdata</span> <span class='keyglyph'>=</span> <span class='varid'>contentValidationPcdata</span>
<a name="line-186"></a> <span class='keyglyph'>|</span> <span class='varid'>typ</span> <span class='varop'>==</span> <span class='varid'>k_empty</span> <span class='keyglyph'>=</span> <span class='varid'>contentValidationEmpty</span>
<a name="line-187"></a> <span class='keyglyph'>|</span> <span class='varid'>typ</span> <span class='varop'>==</span> <span class='varid'>k_any</span> <span class='keyglyph'>=</span> <span class='varid'>contentValidationAny</span>
<a name="line-188"></a> <span class='keyglyph'>|</span> <span class='varid'>typ</span> <span class='varop'>==</span> <span class='varid'>v_children</span> <span class='keyglyph'>=</span> <span class='varid'>contentValidationChildren</span> <span class='varid'>cs</span>
<a name="line-189"></a> <span class='keyglyph'>|</span> <span class='varid'>typ</span> <span class='varop'>==</span> <span class='varid'>v_mixed</span> <span class='keyglyph'>=</span> <span class='varid'>contentValidationMixed</span> <span class='varid'>cs</span>
<a name="line-190"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"contentValidation: unknown type: "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>typ</span><span class='layout'>)</span>
<a name="line-191"></a>
<a name="line-192"></a> <span class='varid'>contentValidation</span> <span class='keyword'>_</span> <span class='varid'>nd'</span>
<a name="line-193"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"contentValidation: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>nd'</span><span class='layout'>)</span>
<a name="line-194"></a>
<a name="line-195"></a>
<a name="line-196"></a> <span class='comment'>-- Checks #PCDATA content models</span>
<a name="line-197"></a> <span class='varid'>contentValidationPcdata</span> <span class='keyglyph'>::</span> <span class='conid'>XmlFilter</span>
<a name="line-198"></a> <span class='varid'>contentValidationPcdata</span> <span class='varid'>n</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XTag</span> <span class='varid'>name</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='varid'>cs</span><span class='layout'>)</span>
<a name="line-199"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>msg</span> <span class='varop'>==</span> <span class='str'>""</span>
<a name="line-200"></a> <span class='keyword'>then</span> <span class='conid'>[]</span>
<a name="line-201"></a> <span class='keyword'>else</span> <span class='varid'>err</span> <span class='layout'>(</span><span class='str'>"The content of element "</span><span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>qualifiedName</span> <span class='varid'>name</span><span class='layout'>)</span> <span class='varop'>++</span>
<a name="line-202"></a> <span class='str'>" must match (#PCDATA). "</span><span class='varop'>++</span> <span class='varid'>msg</span><span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-203"></a> <span class='keyword'>where</span>
<a name="line-204"></a> <span class='varid'>re</span> <span class='keyglyph'>=</span> <span class='varid'>re_rep</span> <span class='layout'>(</span><span class='varid'>re_sym</span> <span class='varid'>k_pcdata</span><span class='layout'>)</span>
<a name="line-205"></a> <span class='varid'>msg</span> <span class='keyglyph'>=</span> <span class='varid'>checkRE</span> <span class='layout'>(</span><span class='varid'>matches</span> <span class='varid'>re</span> <span class='varid'>cs</span><span class='layout'>)</span>
<a name="line-206"></a>
<a name="line-207"></a> <span class='varid'>contentValidationPcdata</span> <span class='varid'>n</span>
<a name="line-208"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"contentValidationPcdata: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-209"></a>
<a name="line-210"></a>
<a name="line-211"></a> <span class='comment'>-- Checks EMPTY content models</span>
<a name="line-212"></a> <span class='varid'>contentValidationEmpty</span> <span class='keyglyph'>::</span> <span class='conid'>XmlFilter</span>
<a name="line-213"></a> <span class='varid'>contentValidationEmpty</span> <span class='varid'>n</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XTag</span> <span class='varid'>name</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='varid'>cs</span><span class='layout'>)</span>
<a name="line-214"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>msg</span> <span class='varop'>==</span> <span class='str'>""</span>
<a name="line-215"></a> <span class='keyword'>then</span> <span class='conid'>[]</span>
<a name="line-216"></a> <span class='keyword'>else</span> <span class='varid'>err</span> <span class='layout'>(</span><span class='str'>"The content of element "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>qualifiedName</span> <span class='varid'>name</span><span class='layout'>)</span> <span class='varop'>++</span>
<a name="line-217"></a> <span class='str'>" must match EMPTY. "</span> <span class='varop'>++</span> <span class='varid'>msg</span><span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-218"></a> <span class='keyword'>where</span>
<a name="line-219"></a> <span class='varid'>re</span> <span class='keyglyph'>=</span> <span class='varid'>re_unit</span>
<a name="line-220"></a> <span class='varid'>msg</span> <span class='keyglyph'>=</span> <span class='varid'>checkRE</span> <span class='layout'>(</span><span class='varid'>matches</span> <span class='varid'>re</span> <span class='varid'>cs</span><span class='layout'>)</span>
<a name="line-221"></a>
<a name="line-222"></a> <span class='varid'>contentValidationEmpty</span> <span class='varid'>n</span>
<a name="line-223"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"contentValidationEmpty: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-224"></a>
<a name="line-225"></a>
<a name="line-226"></a> <span class='comment'>-- Checks ANY content models</span>
<a name="line-227"></a> <span class='varid'>contentValidationAny</span> <span class='keyglyph'>::</span> <span class='conid'>XmlFilter</span>
<a name="line-228"></a> <span class='varid'>contentValidationAny</span> <span class='varid'>n</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XTag</span> <span class='varid'>name</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='varid'>cs</span><span class='layout'>)</span>
<a name="line-229"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>msg</span> <span class='varop'>==</span> <span class='str'>""</span>
<a name="line-230"></a> <span class='keyword'>then</span> <span class='conid'>[]</span>
<a name="line-231"></a> <span class='keyword'>else</span> <span class='varid'>err</span> <span class='layout'>(</span><span class='str'>"The content of element "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>qualifiedName</span> <span class='varid'>name</span><span class='layout'>)</span> <span class='varop'>++</span>
<a name="line-232"></a> <span class='str'>" must match ANY. "</span> <span class='varop'>++</span> <span class='varid'>msg</span><span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-233"></a> <span class='keyword'>where</span>
<a name="line-234"></a> <span class='varid'>re</span> <span class='keyglyph'>=</span> <span class='varid'>re_rep</span> <span class='layout'>(</span><span class='varid'>re_dot</span><span class='layout'>)</span>
<a name="line-235"></a> <span class='varid'>msg</span> <span class='keyglyph'>=</span> <span class='varid'>checkRE</span> <span class='layout'>(</span><span class='varid'>matches</span> <span class='varid'>re</span> <span class='varid'>cs</span><span class='layout'>)</span>
<a name="line-236"></a>
<a name="line-237"></a> <span class='varid'>contentValidationAny</span> <span class='varid'>n</span>
<a name="line-238"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"contentValidationAny: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-239"></a>
<a name="line-240"></a>
<a name="line-241"></a> <span class='comment'>-- Checks "children" content models</span>
<a name="line-242"></a> <span class='varid'>contentValidationChildren</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlFilter</span>
<a name="line-243"></a> <span class='varid'>contentValidationChildren</span> <span class='varid'>cm</span> <span class='varid'>n</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XTag</span> <span class='varid'>name</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='varid'>cs</span><span class='layout'>)</span>
<a name="line-244"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>msg</span> <span class='varop'>==</span> <span class='str'>""</span>
<a name="line-245"></a> <span class='keyword'>then</span> <span class='conid'>[]</span>
<a name="line-246"></a> <span class='keyword'>else</span> <span class='varid'>err</span> <span class='layout'>(</span><span class='str'>"The content of element "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>qualifiedName</span> <span class='varid'>name</span><span class='layout'>)</span> <span class='varop'>++</span>
<a name="line-247"></a> <span class='str'>" must match "</span> <span class='varop'>++</span> <span class='varid'>printRE</span> <span class='varid'>re</span> <span class='varop'>++</span> <span class='str'>". "</span> <span class='varop'>++</span> <span class='varid'>msg</span><span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-248"></a> <span class='keyword'>where</span>
<a name="line-249"></a> <span class='varid'>re</span> <span class='keyglyph'>=</span> <span class='varid'>createRE</span> <span class='layout'>(</span><span class='varid'>head</span> <span class='varid'>cm</span><span class='layout'>)</span>
<a name="line-250"></a> <span class='varid'>msg</span> <span class='keyglyph'>=</span> <span class='varid'>checkRE</span> <span class='layout'>(</span><span class='varid'>matches</span> <span class='varid'>re</span> <span class='varid'>cs</span><span class='layout'>)</span>
<a name="line-251"></a>
<a name="line-252"></a> <span class='varid'>contentValidationChildren</span> <span class='keyword'>_</span> <span class='varid'>n</span>
<a name="line-253"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"contentValidationChildren: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-254"></a>
<a name="line-255"></a>
<a name="line-256"></a> <span class='comment'>-- Checks "mixed content" content models</span>
<a name="line-257"></a> <span class='varid'>contentValidationMixed</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlFilter</span>
<a name="line-258"></a> <span class='varid'>contentValidationMixed</span> <span class='varid'>cm</span> <span class='varid'>n</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XTag</span> <span class='varid'>name</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='varid'>cs</span><span class='layout'>)</span>
<a name="line-259"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>msg</span> <span class='varop'>==</span> <span class='str'>""</span>
<a name="line-260"></a> <span class='keyword'>then</span> <span class='conid'>[]</span>
<a name="line-261"></a> <span class='keyword'>else</span> <span class='varid'>err</span> <span class='layout'>(</span><span class='str'>"The content of element "</span><span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>qualifiedName</span> <span class='varid'>name</span><span class='layout'>)</span> <span class='varop'>++</span>
<a name="line-262"></a> <span class='str'>" must match "</span> <span class='varop'>++</span> <span class='varid'>printRE</span> <span class='varid'>re</span> <span class='varop'>++</span> <span class='str'>". "</span> <span class='varop'>++</span> <span class='varid'>msg</span><span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-263"></a> <span class='keyword'>where</span>
<a name="line-264"></a> <span class='varid'>re</span> <span class='keyglyph'>=</span> <span class='varid'>re_rep</span> <span class='layout'>(</span><span class='varid'>re_alt</span> <span class='layout'>(</span><span class='varid'>re_sym</span> <span class='varid'>k_pcdata</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>createRE</span> <span class='layout'>(</span><span class='varid'>head</span> <span class='varid'>cm</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-265"></a> <span class='varid'>msg</span> <span class='keyglyph'>=</span> <span class='varid'>checkRE</span> <span class='layout'>(</span><span class='varid'>matches</span> <span class='varid'>re</span> <span class='varid'>cs</span><span class='layout'>)</span>
<a name="line-266"></a>
<a name="line-267"></a> <span class='varid'>contentValidationMixed</span> <span class='keyword'>_</span> <span class='varid'>n</span>
<a name="line-268"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"contentValidationMixed: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-269"></a>
<a name="line-270"></a>
<a name="line-271"></a><span class='definition'>buildContentValidation</span> <span class='varid'>nd</span>
<a name="line-272"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"buildContentValidation: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>nd</span><span class='layout'>)</span>
<a name="line-273"></a>
<a name="line-274"></a>
<a name="line-275"></a>
<a name="line-276"></a><span class='comment'>-- |</span>
<a name="line-277"></a><span class='comment'>-- Build a regular expression from the content model. The regular expression</span>
<a name="line-278"></a><span class='comment'>-- is provided by the module XmlRE.</span>
<a name="line-279"></a><span class='comment'>--</span>
<a name="line-280"></a><span class='comment'>-- * 1.parameter nd : node of the content model. Expected: @CONTENT@ or</span>
<a name="line-281"></a><span class='comment'>-- @NAME@</span>
<a name="line-282"></a><span class='comment'>--</span>
<a name="line-283"></a><span class='comment'>-- - returns : regular expression of the content model</span>
<a name="line-284"></a>
<a name="line-285"></a><a name="createRE"></a><span class='definition'>createRE</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>RE</span> <span class='conid'>String</span>
<a name="line-286"></a><span class='definition'>createRE</span> <span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XDTD</span> <span class='conid'>CONTENT</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='varid'>cs</span><span class='layout'>)</span>
<a name="line-287"></a> <span class='keyglyph'>=</span> <span class='varid'>processModifier</span> <span class='varid'>modifier</span>
<a name="line-288"></a> <span class='keyword'>where</span>
<a name="line-289"></a> <span class='varid'>modifier</span> <span class='keyglyph'>=</span> <span class='varid'>lookup1</span> <span class='varid'>a_modifier</span> <span class='varid'>al</span>
<a name="line-290"></a> <span class='varid'>kind</span> <span class='keyglyph'>=</span> <span class='varid'>lookup1</span> <span class='varid'>a_kind</span> <span class='varid'>al</span>
<a name="line-291"></a>
<a name="line-292"></a> <span class='varid'>processModifier</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>RE</span> <span class='conid'>String</span>
<a name="line-293"></a> <span class='varid'>processModifier</span> <span class='varid'>m</span>
<a name="line-294"></a> <span class='keyglyph'>|</span> <span class='varid'>m</span> <span class='varop'>==</span> <span class='varid'>v_plus</span> <span class='keyglyph'>=</span> <span class='varid'>re_plus</span> <span class='layout'>(</span><span class='varid'>processKind</span> <span class='varid'>kind</span><span class='layout'>)</span>
<a name="line-295"></a> <span class='keyglyph'>|</span> <span class='varid'>m</span> <span class='varop'>==</span> <span class='varid'>v_star</span> <span class='keyglyph'>=</span> <span class='varid'>re_rep</span> <span class='layout'>(</span><span class='varid'>processKind</span> <span class='varid'>kind</span><span class='layout'>)</span>
<a name="line-296"></a> <span class='keyglyph'>|</span> <span class='varid'>m</span> <span class='varop'>==</span> <span class='varid'>v_option</span> <span class='keyglyph'>=</span> <span class='varid'>re_opt</span> <span class='layout'>(</span><span class='varid'>processKind</span> <span class='varid'>kind</span><span class='layout'>)</span>
<a name="line-297"></a> <span class='keyglyph'>|</span> <span class='varid'>m</span> <span class='varop'>==</span> <span class='varid'>v_null</span> <span class='keyglyph'>=</span> <span class='varid'>processKind</span> <span class='varid'>kind</span>
<a name="line-298"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"Unknown modifier: "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>m</span><span class='layout'>)</span>
<a name="line-299"></a>
<a name="line-300"></a> <span class='varid'>processKind</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>RE</span> <span class='conid'>String</span>
<a name="line-301"></a> <span class='varid'>processKind</span> <span class='varid'>k</span>
<a name="line-302"></a> <span class='keyglyph'>|</span> <span class='varid'>k</span> <span class='varop'>==</span> <span class='varid'>v_seq</span> <span class='keyglyph'>=</span> <span class='varid'>makeSequence</span> <span class='varid'>cs</span>
<a name="line-303"></a> <span class='keyglyph'>|</span> <span class='varid'>k</span> <span class='varop'>==</span> <span class='varid'>v_choice</span> <span class='keyglyph'>=</span> <span class='varid'>makeChoice</span> <span class='varid'>cs</span>
<a name="line-304"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"Unknown kind: "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>k</span><span class='layout'>)</span>
<a name="line-305"></a>
<a name="line-306"></a> <span class='varid'>makeSequence</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>RE</span> <span class='conid'>String</span>
<a name="line-307"></a> <span class='varid'>makeSequence</span> <span class='conid'>[]</span> <span class='keyglyph'>=</span> <span class='varid'>re_unit</span>
<a name="line-308"></a> <span class='varid'>makeSequence</span> <span class='layout'>(</span><span class='varid'>x</span><span class='conop'>:</span><span class='varid'>xs</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>re_seq</span> <span class='layout'>(</span><span class='varid'>createRE</span> <span class='varid'>x</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>makeSequence</span> <span class='varid'>xs</span><span class='layout'>)</span>
<a name="line-309"></a>
<a name="line-310"></a> <span class='varid'>makeChoice</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>RE</span> <span class='conid'>String</span>
<a name="line-311"></a> <span class='varid'>makeChoice</span> <span class='conid'>[]</span> <span class='keyglyph'>=</span> <span class='varid'>re_zero</span> <span class='str'>""</span>
<a name="line-312"></a> <span class='varid'>makeChoice</span> <span class='layout'>(</span><span class='varid'>x</span><span class='conop'>:</span><span class='varid'>xs</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>re_alt</span> <span class='layout'>(</span><span class='varid'>createRE</span> <span class='varid'>x</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>makeChoice</span> <span class='varid'>xs</span><span class='layout'>)</span>
<a name="line-313"></a>
<a name="line-314"></a><span class='definition'>createRE</span> <span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XDTD</span> <span class='conid'>NAME</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span>
<a name="line-315"></a> <span class='keyglyph'>=</span> <span class='varid'>re_sym</span> <span class='layout'>(</span><span class='varid'>lookup1</span> <span class='varid'>a_name</span> <span class='varid'>al</span><span class='layout'>)</span>
<a name="line-316"></a>
<a name="line-317"></a><span class='definition'>createRE</span> <span class='varid'>nd</span>
<a name="line-318"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"createRE: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>nd</span><span class='layout'>)</span>
<a name="line-319"></a>
<a name="line-320"></a>
<a name="line-321"></a>
<a name="line-322"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-323"></a>
<a name="line-324"></a>
<a name="line-325"></a>
<a name="line-326"></a><span class='comment'>-- |</span>
<a name="line-327"></a><span class='comment'>-- Build validation functions for the attributes of an element.</span>
<a name="line-328"></a><span class='comment'>--</span>
<a name="line-329"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-330"></a><span class='comment'>--</span>
<a name="line-331"></a><span class='comment'>-- - 2.parameter nd : element declaration for which the attribute validation functions</span>
<a name="line-332"></a><span class='comment'>-- are created</span>
<a name="line-333"></a><span class='comment'>--</span>
<a name="line-334"></a><span class='comment'>-- - returns : a function which takes an element (XTag), checks if its</span>
<a name="line-335"></a><span class='comment'>-- attributes are valid and returns a list of errors</span>
<a name="line-336"></a>
<a name="line-337"></a><a name="buildAttributeValidation"></a><span class='definition'>buildAttributeValidation</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlFilter</span>
<a name="line-338"></a><span class='definition'>buildAttributeValidation</span> <span class='varid'>dtdPart</span> <span class='varid'>nd</span> <span class='keyglyph'>=</span>
<a name="line-339"></a> <span class='varid'>noDoublicateAttributes</span>
<a name="line-340"></a> <span class='varop'>+++</span>
<a name="line-341"></a> <span class='varid'>checkNotDeclardAttributes</span> <span class='varid'>attrDecls</span> <span class='varid'>nd</span>
<a name="line-342"></a> <span class='varop'>+++</span>
<a name="line-343"></a> <span class='varid'>checkRequiredAttributes</span> <span class='varid'>attrDecls</span> <span class='varid'>nd</span>
<a name="line-344"></a> <span class='varop'>+++</span>
<a name="line-345"></a> <span class='varid'>checkFixedAttributes</span> <span class='varid'>attrDecls</span> <span class='varid'>nd</span>
<a name="line-346"></a> <span class='varop'>+++</span>
<a name="line-347"></a> <span class='varid'>checkValuesOfAttributes</span> <span class='varid'>attrDecls</span> <span class='varid'>dtdPart</span> <span class='varid'>nd</span>
<a name="line-348"></a> <span class='keyword'>where</span>
<a name="line-349"></a> <span class='varid'>attrDecls</span> <span class='keyglyph'>=</span> <span class='varid'>isAttlist</span> <span class='varop'>$$</span> <span class='varid'>dtdPart</span>
<a name="line-350"></a>
<a name="line-351"></a>
<a name="line-352"></a><span class='comment'>-- |</span>
<a name="line-353"></a><span class='comment'>-- Validate that all attributes of an element are unique.</span>
<a name="line-354"></a><span class='comment'>-- Well-formdness constraint: Unique AttSpec (3.1 \/ p.19 in Spec)</span>
<a name="line-355"></a><span class='comment'>--</span>
<a name="line-356"></a><span class='comment'>-- - returns : a function which takes an element (XTag), checks if its</span>
<a name="line-357"></a><span class='comment'>-- attributes are unique and returns a list of errors</span>
<a name="line-358"></a>
<a name="line-359"></a><a name="noDoublicateAttributes"></a><span class='definition'>noDoublicateAttributes</span> <span class='keyglyph'>::</span> <span class='conid'>XmlFilter</span>
<a name="line-360"></a><span class='definition'>noDoublicateAttributes</span> <span class='varid'>n</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XTag</span> <span class='keyword'>_</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span>
<a name="line-361"></a> <span class='keyglyph'>=</span> <span class='varid'>doubles</span> <span class='varop'>.</span> <span class='varid'>reverse</span> <span class='varop'>$</span> <span class='varid'>names</span>
<a name="line-362"></a> <span class='keyword'>where</span>
<a name="line-363"></a> <span class='varid'>tagname</span> <span class='keyglyph'>=</span> <span class='varid'>nameOf</span> <span class='varid'>n</span>
<a name="line-364"></a> <span class='varid'>names</span> <span class='keyglyph'>=</span> <span class='varid'>map</span> <span class='varid'>nameOf</span> <span class='varop'>.</span> <span class='varid'>getAttrl</span> <span class='varop'>$</span> <span class='varid'>n</span>
<a name="line-365"></a>
<a name="line-366"></a> <span class='varid'>doubles</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTrees</span>
<a name="line-367"></a> <span class='varid'>doubles</span> <span class='conid'>[]</span>
<a name="line-368"></a> <span class='keyglyph'>=</span> <span class='conid'>[]</span>
<a name="line-369"></a> <span class='varid'>doubles</span> <span class='layout'>(</span><span class='varid'>n1</span><span class='conop'>:</span><span class='varid'>ns</span><span class='layout'>)</span>
<a name="line-370"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span> <span class='keyword'>if</span> <span class='varid'>n1</span> <span class='varop'>`elem`</span> <span class='varid'>ns</span>
<a name="line-371"></a> <span class='keyword'>then</span> <span class='varid'>err</span> <span class='layout'>(</span><span class='str'>"Attribute "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n1</span> <span class='varop'>++</span> <span class='str'>" was already specified for element "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>tagname</span> <span class='varop'>++</span> <span class='str'>"."</span><span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-372"></a> <span class='keyword'>else</span> <span class='conid'>[]</span>
<a name="line-373"></a> <span class='layout'>)</span> <span class='varop'>++</span> <span class='varid'>doubles</span> <span class='varid'>ns</span>
<a name="line-374"></a>
<a name="line-375"></a><span class='definition'>noDoublicateAttributes</span> <span class='varid'>n</span>
<a name="line-376"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"noDoublicateAttributes: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-377"></a>
<a name="line-378"></a>
<a name="line-379"></a><span class='comment'>-- |</span>
<a name="line-380"></a><span class='comment'>-- Validate that all \#REQUIRED attributes are provided.</span>
<a name="line-381"></a><span class='comment'>-- Validity constraint: Required Attributes (3.3.2 \/ p.28 in Spec)</span>
<a name="line-382"></a><span class='comment'>--</span>
<a name="line-383"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-384"></a><span class='comment'>--</span>
<a name="line-385"></a><span class='comment'>-- - 2.parameter nd : element declaration which attributes have to be checked</span>
<a name="line-386"></a><span class='comment'>--</span>
<a name="line-387"></a><span class='comment'>-- - returns : a function which takes an element (XTag), checks if all</span>
<a name="line-388"></a><span class='comment'>-- required attributes are provided and returns a list of errors</span>
<a name="line-389"></a>
<a name="line-390"></a><a name="checkRequiredAttributes"></a><span class='definition'>checkRequiredAttributes</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlFilter</span>
<a name="line-391"></a><span class='definition'>checkRequiredAttributes</span> <span class='varid'>attrDecls</span> <span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XDTD</span> <span class='conid'>ELEMENT</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span>
<a name="line-392"></a> <span class='keyglyph'>=</span> <span class='varid'>checkRequired</span> <span class='varid'>requiredAtts</span>
<a name="line-393"></a> <span class='keyword'>where</span>
<a name="line-394"></a> <span class='varid'>elemName</span> <span class='keyglyph'>=</span> <span class='varid'>lookup1</span> <span class='varid'>a_name</span> <span class='varid'>al</span>
<a name="line-395"></a> <span class='varid'>requiredAtts</span> <span class='keyglyph'>=</span> <span class='varid'>isRequiredAttrKind</span> <span class='varop'>$$</span> <span class='layout'>(</span><span class='varid'>isAttlistOfElement</span> <span class='varid'>elemName</span> <span class='varop'>$$</span> <span class='varid'>attrDecls</span><span class='layout'>)</span>
<a name="line-396"></a>
<a name="line-397"></a>
<a name="line-398"></a> <span class='varid'>checkRequired</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlFilter</span>
<a name="line-399"></a> <span class='varid'>checkRequired</span> <span class='layout'>(</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XDTD</span> <span class='conid'>ATTLIST</span> <span class='varid'>al'</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span><span class='conop'>:</span><span class='varid'>xs</span><span class='layout'>)</span> <span class='varid'>n</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XTag</span> <span class='varid'>name</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span>
<a name="line-400"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>satisfies</span> <span class='layout'>(</span><span class='varid'>hasAttr</span> <span class='varid'>attName</span><span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-401"></a> <span class='keyword'>then</span> <span class='varid'>checkRequired</span> <span class='varid'>xs</span> <span class='varid'>n</span>
<a name="line-402"></a> <span class='keyword'>else</span> <span class='varid'>err</span> <span class='layout'>(</span><span class='str'>"Attribute "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>attName</span> <span class='varop'>++</span> <span class='str'>" must be declared for element type "</span> <span class='varop'>++</span>
<a name="line-403"></a> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>qualifiedName</span> <span class='varid'>name</span><span class='layout'>)</span> <span class='varop'>++</span> <span class='str'>"."</span><span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-404"></a> <span class='varop'>++</span>
<a name="line-405"></a> <span class='varid'>checkRequired</span> <span class='varid'>xs</span> <span class='varid'>n</span>
<a name="line-406"></a> <span class='keyword'>where</span>
<a name="line-407"></a> <span class='varid'>attName</span> <span class='keyglyph'>=</span> <span class='varid'>lookup1</span> <span class='varid'>a_value</span> <span class='varid'>al'</span>
<a name="line-408"></a>
<a name="line-409"></a> <span class='varid'>checkRequired</span> <span class='conid'>[]</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>[]</span>
<a name="line-410"></a>
<a name="line-411"></a> <span class='varid'>checkRequired</span> <span class='varid'>nd</span> <span class='varid'>n</span>
<a name="line-412"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"checkRequired: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>nd</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-413"></a>
<a name="line-414"></a>
<a name="line-415"></a><span class='definition'>checkRequiredAttributes</span> <span class='keyword'>_</span> <span class='varid'>nd</span>
<a name="line-416"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"checkRequiredAttributes: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>nd</span><span class='layout'>)</span>
<a name="line-417"></a>
<a name="line-418"></a>
<a name="line-419"></a>
<a name="line-420"></a><span class='comment'>-- |</span>
<a name="line-421"></a><span class='comment'>-- Validate that \#FIXED attributes match the default value.</span>
<a name="line-422"></a><span class='comment'>-- Validity constraint: Fixed Attribute Default (3.3.2 \/ p.28 in Spec)</span>
<a name="line-423"></a><span class='comment'>--</span>
<a name="line-424"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-425"></a><span class='comment'>--</span>
<a name="line-426"></a><span class='comment'>-- - 2.parameter nd : element declaration which attributes have to be checked</span>
<a name="line-427"></a><span class='comment'>--</span>
<a name="line-428"></a><span class='comment'>-- - returns : a function which takes an element (XTag), checks if all</span>
<a name="line-429"></a><span class='comment'>-- fixed attributes match the default value and returns a list of errors</span>
<a name="line-430"></a>
<a name="line-431"></a><a name="checkFixedAttributes"></a><span class='definition'>checkFixedAttributes</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlFilter</span>
<a name="line-432"></a><span class='definition'>checkFixedAttributes</span> <span class='varid'>attrDecls</span> <span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XDTD</span> <span class='conid'>ELEMENT</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span>
<a name="line-433"></a> <span class='keyglyph'>=</span> <span class='varid'>checkFixed</span> <span class='varid'>fixedAtts</span>
<a name="line-434"></a> <span class='keyword'>where</span>
<a name="line-435"></a> <span class='varid'>elemName</span> <span class='keyglyph'>=</span> <span class='varid'>lookup1</span> <span class='varid'>a_name</span> <span class='varid'>al</span>
<a name="line-436"></a> <span class='varid'>fixedAtts</span> <span class='keyglyph'>=</span> <span class='varid'>isFixedAttrKind</span> <span class='varop'>$$</span> <span class='layout'>(</span><span class='varid'>isAttlistOfElement</span> <span class='varid'>elemName</span> <span class='varop'>$$</span> <span class='varid'>attrDecls</span><span class='layout'>)</span>
<a name="line-437"></a>
<a name="line-438"></a>
<a name="line-439"></a> <span class='varid'>checkFixed</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlFilter</span>
<a name="line-440"></a> <span class='varid'>checkFixed</span> <span class='layout'>(</span><span class='varid'>x</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XDTD</span> <span class='conid'>ATTLIST</span> <span class='varid'>al'</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span><span class='conop'>:</span><span class='varid'>xs</span><span class='layout'>)</span> <span class='varid'>n</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XTag</span> <span class='varid'>name</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span>
<a name="line-441"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>satisfies</span> <span class='layout'>(</span><span class='varid'>hasAttr</span> <span class='varid'>attName</span><span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-442"></a> <span class='keyword'>then</span> <span class='keyword'>if</span> <span class='varid'>attValue</span> <span class='varop'>==</span> <span class='varid'>fixedValue</span>
<a name="line-443"></a> <span class='keyword'>then</span> <span class='varid'>checkFixed</span> <span class='varid'>xs</span> <span class='varid'>n</span>
<a name="line-444"></a> <span class='keyword'>else</span> <span class='varid'>err</span> <span class='layout'>(</span><span class='str'>"Attribute "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>attName</span> <span class='varop'>++</span> <span class='str'>" of element "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>qualifiedName</span> <span class='varid'>name</span><span class='layout'>)</span> <span class='varop'>++</span>
<a name="line-445"></a> <span class='str'>" with value "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>attValue</span> <span class='varop'>++</span> <span class='str'>" must have a value of "</span> <span class='varop'>++</span>
<a name="line-446"></a> <span class='varid'>show</span> <span class='varid'>fixedValue</span> <span class='varop'>++</span> <span class='str'>"."</span><span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-447"></a> <span class='varop'>++</span>
<a name="line-448"></a> <span class='varid'>checkFixed</span> <span class='varid'>xs</span> <span class='varid'>n</span>
<a name="line-449"></a> <span class='keyword'>else</span> <span class='varid'>checkFixed</span> <span class='varid'>xs</span> <span class='varid'>n</span>
<a name="line-450"></a> <span class='keyword'>where</span>
<a name="line-451"></a> <span class='varid'>attName</span> <span class='keyglyph'>=</span> <span class='varid'>lookup1</span> <span class='varid'>a_value</span> <span class='varid'>al'</span>
<a name="line-452"></a> <span class='varid'>fixedValue</span> <span class='keyglyph'>=</span> <span class='varid'>normalizeAttributeValue</span> <span class='layout'>(</span><span class='conid'>Just</span> <span class='varid'>x</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>lookup1</span> <span class='varid'>a_default</span> <span class='varid'>al'</span><span class='layout'>)</span>
<a name="line-453"></a> <span class='varid'>attValue</span> <span class='keyglyph'>=</span> <span class='varid'>normalizeAttributeValue</span> <span class='layout'>(</span><span class='conid'>Just</span> <span class='varid'>x</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>valueOf</span> <span class='varid'>attName</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-454"></a>
<a name="line-455"></a> <span class='varid'>checkFixed</span> <span class='conid'>[]</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>[]</span>
<a name="line-456"></a>
<a name="line-457"></a> <span class='varid'>checkFixed</span> <span class='varid'>nd</span> <span class='varid'>n</span>
<a name="line-458"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"checkFixed: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>nd</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-459"></a>
<a name="line-460"></a>
<a name="line-461"></a><span class='definition'>checkFixedAttributes</span> <span class='keyword'>_</span> <span class='varid'>nd</span>
<a name="line-462"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"checkFixedAttributes: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>nd</span><span class='layout'>)</span>
<a name="line-463"></a>
<a name="line-464"></a>
<a name="line-465"></a><span class='comment'>-- |</span>
<a name="line-466"></a><span class='comment'>-- Validate that an element has no attributes which are not declared.</span>
<a name="line-467"></a><span class='comment'>-- Validity constraint: Attribute Value Type (3.1 \/ p.19 in Spec)</span>
<a name="line-468"></a><span class='comment'>--</span>
<a name="line-469"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-470"></a><span class='comment'>--</span>
<a name="line-471"></a><span class='comment'>-- - 2.parameter nd : element declaration which attributes have to be checked</span>
<a name="line-472"></a><span class='comment'>--</span>
<a name="line-473"></a><span class='comment'>-- - returns : a function which takes an element (XTag), checks if all</span>
<a name="line-474"></a><span class='comment'>-- attributes are declared and returns a list of errors</span>
<a name="line-475"></a>
<a name="line-476"></a><a name="checkNotDeclardAttributes"></a><span class='definition'>checkNotDeclardAttributes</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlFilter</span>
<a name="line-477"></a><span class='definition'>checkNotDeclardAttributes</span> <span class='varid'>attrDecls</span> <span class='varid'>elemDescr</span>
<a name="line-478"></a> <span class='keyglyph'>=</span> <span class='varid'>checkNotDeclared</span>
<a name="line-479"></a> <span class='keyword'>where</span>
<a name="line-480"></a> <span class='varid'>elemName</span> <span class='keyglyph'>=</span> <span class='varid'>valueOfDTD</span> <span class='varid'>a_name</span> <span class='varid'>elemDescr</span>
<a name="line-481"></a> <span class='varid'>decls</span> <span class='keyglyph'>=</span> <span class='varid'>isAttlistOfElement</span> <span class='varid'>elemName</span> <span class='varop'>$$</span> <span class='varid'>attrDecls</span>
<a name="line-482"></a>
<a name="line-483"></a> <span class='varid'>checkNotDeclared</span> <span class='keyglyph'>::</span> <span class='conid'>XmlFilter</span>
<a name="line-484"></a> <span class='varid'>checkNotDeclared</span> <span class='varid'>n</span>
<a name="line-485"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span> <span class='varid'>isXTag</span>
<a name="line-486"></a> <span class='varop'>`guards`</span>
<a name="line-487"></a> <span class='varid'>cat</span> <span class='layout'>(</span><span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>searchForDeclaredAtt</span> <span class='varid'>elemName</span> <span class='varid'>decls</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>getAttrl</span> <span class='varid'>n</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-488"></a> <span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-489"></a>
<a name="line-490"></a> <span class='varid'>searchForDeclaredAtt</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlFilter</span>
<a name="line-491"></a> <span class='varid'>searchForDeclaredAtt</span> <span class='varid'>name</span> <span class='layout'>(</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XDTD</span> <span class='conid'>ATTLIST</span> <span class='varid'>al'</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span><span class='conop'>:</span><span class='varid'>xs</span><span class='layout'>)</span> <span class='varid'>att</span>
<a name="line-492"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='layout'>(</span><span class='varid'>lookup1</span> <span class='varid'>a_value</span> <span class='varid'>al'</span><span class='layout'>)</span> <span class='varop'>==</span> <span class='varid'>nameOf</span> <span class='varid'>att</span>
<a name="line-493"></a> <span class='keyword'>then</span> <span class='varid'>none</span>
<a name="line-494"></a> <span class='keyword'>else</span> <span class='varid'>searchForDeclaredAtt</span> <span class='varid'>name</span> <span class='varid'>xs</span> <span class='varid'>att</span>
<a name="line-495"></a>
<a name="line-496"></a> <span class='varid'>searchForDeclaredAtt</span> <span class='varid'>name</span> <span class='conid'>[]</span> <span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XAttr</span> <span class='varid'>attrName</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span>
<a name="line-497"></a> <span class='keyglyph'>=</span> <span class='varid'>err</span> <span class='layout'>(</span><span class='str'>"Attribute "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>qualifiedName</span> <span class='varid'>attrName</span><span class='layout'>)</span> <span class='varop'>++</span> <span class='str'>" of element "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>name</span> <span class='varop'>++</span> <span class='str'>" is not declared in DTD."</span><span class='layout'>)</span>
<a name="line-498"></a>
<a name="line-499"></a> <span class='varid'>searchForDeclaredAtt</span> <span class='keyword'>_</span> <span class='varid'>nd</span> <span class='varid'>a</span>
<a name="line-500"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"searchForDeclaredAtt: illegeal paramter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>nd</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>a</span><span class='layout'>)</span>
<a name="line-501"></a>
<a name="line-502"></a><span class='comment'>-- |</span>
<a name="line-503"></a><span class='comment'>-- Validate that the attribute value meets the lexical constraints of its type.</span>
<a name="line-504"></a><span class='comment'>-- Validity constaint: Attribute Value Type (3.1 \/ p.19 in Spec)</span>
<a name="line-505"></a><span class='comment'>--</span>
<a name="line-506"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-507"></a><span class='comment'>--</span>
<a name="line-508"></a><span class='comment'>-- - 2.parameter nd : element declaration which attributes have to be checked</span>
<a name="line-509"></a><span class='comment'>--</span>
<a name="line-510"></a><span class='comment'>-- - returns : a function which takes an element (XTag), checks if all</span>
<a name="line-511"></a><span class='comment'>-- attributes meet the lexical constraints and returns a list of errors</span>
<a name="line-512"></a>
<a name="line-513"></a><a name="checkValuesOfAttributes"></a><span class='definition'>checkValuesOfAttributes</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlFilter</span>
<a name="line-514"></a><span class='definition'>checkValuesOfAttributes</span> <span class='varid'>attrDecls</span> <span class='varid'>dtdPart</span> <span class='varid'>elemDescr</span>
<a name="line-515"></a> <span class='keyglyph'>=</span> <span class='varid'>checkValues</span>
<a name="line-516"></a> <span class='keyword'>where</span>
<a name="line-517"></a> <span class='varid'>elemName</span> <span class='keyglyph'>=</span> <span class='varid'>valueOfDTD</span> <span class='varid'>a_name</span> <span class='varid'>elemDescr</span>
<a name="line-518"></a> <span class='varid'>decls</span> <span class='keyglyph'>=</span> <span class='varid'>isAttlistOfElement</span> <span class='varid'>elemName</span> <span class='varop'>$$</span> <span class='varid'>attrDecls</span>
<a name="line-519"></a>
<a name="line-520"></a> <span class='varid'>checkValues</span> <span class='keyglyph'>::</span> <span class='conid'>XmlFilter</span>
<a name="line-521"></a> <span class='varid'>checkValues</span> <span class='varid'>n</span>
<a name="line-522"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span> <span class='varid'>isXTag</span>
<a name="line-523"></a> <span class='varop'>`guards`</span>
<a name="line-524"></a> <span class='varid'>cat</span> <span class='layout'>(</span><span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>checkValue</span> <span class='varid'>decls</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>getAttrl</span> <span class='varid'>n</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-525"></a> <span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-526"></a>
<a name="line-527"></a> <span class='varid'>checkValue</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlFilter</span>
<a name="line-528"></a> <span class='varid'>checkValue</span> <span class='layout'>(</span><span class='varid'>attrDecl</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XDTD</span> <span class='conid'>ATTLIST</span> <span class='varid'>al'</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span><span class='conop'>:</span><span class='varid'>xs</span><span class='layout'>)</span> <span class='varid'>att</span>
<a name="line-529"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='layout'>(</span><span class='varid'>lookup1</span> <span class='varid'>a_value</span> <span class='varid'>al'</span><span class='layout'>)</span> <span class='varop'>==</span> <span class='varid'>nameOf</span> <span class='varid'>att</span>
<a name="line-530"></a> <span class='keyword'>then</span> <span class='varid'>checkAttributeValue</span> <span class='varid'>dtdPart</span> <span class='varid'>attrDecl</span>
<a name="line-531"></a> <span class='keyword'>else</span> <span class='varid'>checkValue</span> <span class='varid'>xs</span> <span class='varid'>att</span>
<a name="line-532"></a>
<a name="line-533"></a> <span class='varid'>checkValue</span> <span class='conid'>[]</span> <span class='keyword'>_</span>
<a name="line-534"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span> <span class='comment'>-- undeclared attribute, reported by separate function</span>
<a name="line-535"></a>
<a name="line-536"></a> <span class='varid'>checkValue</span> <span class='varid'>n</span> <span class='keyword'>_</span>
<a name="line-537"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"checkValue: illegeal parameter:\n"</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-538"></a>
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