hxt-8.0.0: doc/hdoc/src/Text-XML-HXT-DTDValidation-DocValidation.html
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<pre><a name="line-1"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='comment'>{- |
<a name="line-4"></a> Module : Text.XML.HXT.DTDValidation.TypeDefs
<a name="line-5"></a> Copyright : Copyright (C) 2008 Uwe Schmidt
<a name="line-6"></a> License : MIT
<a name="line-7"></a>
<a name="line-8"></a> Maintainer : Uwe Schmidt (uwe@fh-wedel.de)
<a name="line-9"></a> Stability : experimental
<a name="line-10"></a> Portability: portable
<a name="line-11"></a>
<a name="line-12"></a> This module provides functions for validating XML Documents represented as
<a name="line-13"></a> XmlTree.
<a name="line-14"></a>
<a name="line-15"></a> Unlike other popular XML validation tools the validation process returns
<a name="line-16"></a> a list of errors instead of aborting after the first error was found.
<a name="line-17"></a>
<a name="line-18"></a> Before the document is validated, a lookup-table is build on the basis of
<a name="line-19"></a> the DTD which maps element names to their validation functions.
<a name="line-20"></a> After this initialization phase the whole document is traversed in preorder
<a name="line-21"></a> and every element is validated by the XmlFilter from the lookup-table.
<a name="line-22"></a>
<a name="line-23"></a>-}</span>
<a name="line-24"></a>
<a name="line-25"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-26"></a>
<a name="line-27"></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'>DTDValidation</span><span class='varop'>.</span><span class='conid'>DocValidation</span>
<a name="line-28"></a> <span class='layout'>(</span> <span class='varid'>validateDoc</span>
<a name="line-29"></a> <span class='layout'>)</span>
<a name="line-30"></a><span class='keyword'>where</span>
<a name="line-31"></a>
<a name="line-32"></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'>DTDValidation</span><span class='varop'>.</span><span class='conid'>TypeDefs</span>
<a name="line-33"></a>
<a name="line-34"></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'>DTDValidation</span><span class='varop'>.</span><span class='conid'>AttributeValueValidation</span>
<a name="line-35"></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'>DTDValidation</span><span class='varop'>.</span><span class='conid'>XmlRE</span>
<a name="line-36"></a>
<a name="line-37"></a><span class='keyword'>import</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>Maybe</span>
<a name="line-38"></a>
<a name="line-39"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-40"></a>
<a name="line-41"></a><span class='comment'>-- |</span>
<a name="line-42"></a><span class='comment'>-- Lookup-table which maps element names to their validation functions. The</span>
<a name="line-43"></a><span class='comment'>-- validation functions are XmlArrows.</span>
<a name="line-44"></a>
<a name="line-45"></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-46"></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-47"></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-48"></a><a name="ValFct"></a><span class='keyword'>type</span> <span class='conid'>ValFct</span> <span class='keyglyph'>=</span> <span class='conid'>XmlArrow</span>
<a name="line-49"></a>
<a name="line-50"></a>
<a name="line-51"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-52"></a>
<a name="line-53"></a><span class='comment'>-- |</span>
<a name="line-54"></a><span class='comment'>-- Validate a document.</span>
<a name="line-55"></a><span class='comment'>--</span>
<a name="line-56"></a><span class='comment'>-- * 1.parameter dtdPart : the DTD subset (Node @DOCTYPE@) of the XmlTree</span>
<a name="line-57"></a><span class='comment'>--</span>
<a name="line-58"></a><span class='comment'>-- - 2.parameter doc : the document subset of the XmlTree</span>
<a name="line-59"></a><span class='comment'>--</span>
<a name="line-60"></a><span class='comment'>-- - returns : a list of errors</span>
<a name="line-61"></a>
<a name="line-62"></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'>XmlArrow</span>
<a name="line-63"></a><span class='definition'>validateDoc</span> <span class='varid'>dtdPart</span>
<a name="line-64"></a> <span class='keyglyph'>=</span> <span class='varid'>traverseTree</span> <span class='varid'>valTable</span>
<a name="line-65"></a> <span class='keyword'>where</span>
<a name="line-66"></a> <span class='varid'>valTable</span> <span class='keyglyph'>=</span> <span class='varid'>buildAllValidationFunctions</span> <span class='varid'>dtdPart</span>
<a name="line-67"></a>
<a name="line-68"></a>
<a name="line-69"></a><span class='comment'>-- |</span>
<a name="line-70"></a><span class='comment'>-- Traverse the XmlTree in preorder.</span>
<a name="line-71"></a><span class='comment'>--</span>
<a name="line-72"></a><span class='comment'>-- * 1.parameter valiEnv : lookup-table which maps element names to their validation functions</span>
<a name="line-73"></a><span class='comment'>--</span>
<a name="line-74"></a><span class='comment'>-- - returns : list of errors</span>
<a name="line-75"></a>
<a name="line-76"></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'>XmlArrow</span>
<a name="line-77"></a><span class='definition'>traverseTree</span> <span class='varid'>valiEnv</span>
<a name="line-78"></a> <span class='keyglyph'>=</span> <span class='varid'>choiceA</span> <span class='keyglyph'>[</span> <span class='varid'>isElem</span> <span class='conop'>:-></span> <span class='layout'>(</span><span class='varid'>valFct</span> <span class='varop'>$<</span> <span class='varid'>getQName</span><span class='layout'>)</span>
<a name="line-79"></a> <span class='layout'>,</span> <span class='varid'>this</span> <span class='conop'>:-></span> <span class='varid'>none</span>
<a name="line-80"></a> <span class='keyglyph'>]</span>
<a name="line-81"></a> <span class='varop'><+></span>
<a name="line-82"></a> <span class='layout'>(</span> <span class='varid'>getChildren</span> <span class='varop'>>>></span> <span class='varid'>traverseTree</span> <span class='varid'>valiEnv</span> <span class='layout'>)</span>
<a name="line-83"></a> <span class='keyword'>where</span>
<a name="line-84"></a> <span class='varid'>valFct</span> <span class='keyglyph'>::</span> <span class='conid'>QName</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-85"></a> <span class='varid'>valFct</span> <span class='varid'>name</span> <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-86"></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-87"></a> <span class='conid'>Just</span> <span class='varid'>f</span> <span class='keyglyph'>-></span> <span class='varid'>f</span>
<a name="line-88"></a>
<a name="line-89"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-90"></a>
<a name="line-91"></a><span class='comment'>-- |</span>
<a name="line-92"></a><span class='comment'>-- Build all validation functions.</span>
<a name="line-93"></a><span class='comment'>--</span>
<a name="line-94"></a><span class='comment'>-- * 1.parameter dtdPart : DTD subset, root node should be of type @DOCTYPE@</span>
<a name="line-95"></a><span class='comment'>--</span>
<a name="line-96"></a><span class='comment'>-- - returns : lookup-table which maps element names to their validation functions</span>
<a name="line-97"></a>
<a name="line-98"></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-99"></a><span class='definition'>buildAllValidationFunctions</span> <span class='varid'>dtdPart</span>
<a name="line-100"></a> <span class='keyglyph'>=</span> <span class='varid'>concat</span> <span class='varop'>$</span>
<a name="line-101"></a> <span class='varid'>buildValidateRoot</span> <span class='varid'>dtdPart</span> <span class='conop'>:</span> <span class='comment'>-- construct a list of validation filters for all element declarations</span>
<a name="line-102"></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='varid'>dtdNodes</span>
<a name="line-103"></a> <span class='keyword'>where</span>
<a name="line-104"></a> <span class='varid'>dtdNodes</span> <span class='keyglyph'>=</span> <span class='varid'>runLA</span> <span class='varid'>getChildren</span> <span class='varid'>dtdPart</span>
<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='keyglyph'>[</span><span class='conid'>ValiEnv</span><span class='keyglyph'>]</span>
<a name="line-115"></a><span class='definition'>buildValidateRoot</span> <span class='varid'>dn</span>
<a name="line-116"></a> <span class='keyglyph'>|</span> <span class='varid'>isDTDDoctypeNode</span> <span class='varid'>dn</span> <span class='keyglyph'>=</span> <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><span class='keyglyph'>]</span>
<a name="line-117"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='conid'>[]</span>
<a name="line-118"></a> <span class='keyword'>where</span>
<a name="line-119"></a> <span class='varid'>name</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varop'>.</span> <span class='varid'>getDTDAttributes</span> <span class='varop'>$</span> <span class='varid'>dn</span>
<a name="line-120"></a>
<a name="line-121"></a> <span class='varid'>valFct</span> <span class='keyglyph'>::</span> <span class='conid'>XmlArrow</span>
<a name="line-122"></a> <span class='varid'>valFct</span> <span class='keyglyph'>=</span> <span class='varid'>isElem</span>
<a name="line-123"></a> <span class='varop'>`guards`</span>
<a name="line-124"></a> <span class='layout'>(</span> <span class='varid'>checkRegex</span> <span class='layout'>(</span><span class='varid'>re_sym</span> <span class='varid'>name</span><span class='layout'>)</span>
<a name="line-125"></a> <span class='varop'>>>></span>
<a name="line-126"></a> <span class='varid'>msgToErr</span> <span class='layout'>(</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='layout'>)</span> <span class='varop'>++</span><span class='layout'>)</span>
<a name="line-127"></a> <span class='layout'>)</span>
<a name="line-128"></a>
<a name="line-129"></a><a name="checkRegex"></a><span class='definition'>checkRegex</span> <span class='keyglyph'>::</span> <span class='conid'>RE</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='conid'>String</span>
<a name="line-130"></a><span class='definition'>checkRegex</span> <span class='varid'>re</span> <span class='keyglyph'>=</span> <span class='varid'>listA</span> <span class='varid'>getChildren</span>
<a name="line-131"></a> <span class='varop'>>>></span> <span class='varid'>arr</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='varid'>cs</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><span class='layout'>)</span>
<a name="line-132"></a>
<a name="line-133"></a><span class='comment'>-- |</span>
<a name="line-134"></a><span class='comment'>-- Build validation functions for an element.</span>
<a name="line-135"></a><span class='comment'>--</span>
<a name="line-136"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-137"></a><span class='comment'>--</span>
<a name="line-138"></a><span class='comment'>-- - 2.parameter nd : element declaration for which the validation functions are</span>
<a name="line-139"></a><span class='comment'>-- created</span>
<a name="line-140"></a><span class='comment'>--</span>
<a name="line-141"></a><span class='comment'>-- - returns : entry for the lookup-table</span>
<a name="line-142"></a>
<a name="line-143"></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='keyglyph'>[</span><span class='conid'>ValiEnv</span><span class='keyglyph'>]</span>
<a name="line-144"></a>
<a name="line-145"></a><span class='definition'>buildValidateFunctions</span> <span class='varid'>dtdPart</span> <span class='varid'>dn</span>
<a name="line-146"></a> <span class='keyglyph'>|</span> <span class='varid'>isDTDElementNode</span> <span class='varid'>dn</span> <span class='keyglyph'>=</span> <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><span class='keyglyph'>]</span>
<a name="line-147"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='conid'>[]</span>
<a name="line-148"></a> <span class='keyword'>where</span>
<a name="line-149"></a> <span class='varid'>elemName</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varop'>.</span> <span class='varid'>getDTDAttributes</span> <span class='varop'>$</span> <span class='varid'>dn</span>
<a name="line-150"></a>
<a name="line-151"></a> <span class='varid'>valFct</span> <span class='keyglyph'>::</span> <span class='conid'>XmlArrow</span>
<a name="line-152"></a> <span class='varid'>valFct</span> <span class='keyglyph'>=</span> <span class='varid'>buildContentValidation</span> <span class='varid'>dn</span>
<a name="line-153"></a> <span class='varop'><+></span>
<a name="line-154"></a> <span class='varid'>buildAttributeValidation</span> <span class='varid'>dtdPart</span> <span class='varid'>dn</span>
<a name="line-155"></a>
<a name="line-156"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-157"></a>
<a name="line-158"></a>
<a name="line-159"></a><span class='comment'>-- |</span>
<a name="line-160"></a><span class='comment'>-- Build validation functions for the content model of an element.</span>
<a name="line-161"></a><span class='comment'>-- Validity constraint: Element Valid (3 \/ p.18 in Spec)</span>
<a name="line-162"></a><span class='comment'>--</span>
<a name="line-163"></a><span class='comment'>-- * 1.parameter nd : element declaration for which the content validation functions</span>
<a name="line-164"></a><span class='comment'>-- are built</span>
<a name="line-165"></a><span class='comment'>--</span>
<a name="line-166"></a><span class='comment'>-- - returns : a function which takes an element (XTag), checks if its</span>
<a name="line-167"></a><span class='comment'>-- children match its content model and returns a list of errors</span>
<a name="line-168"></a>
<a name="line-169"></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'>XmlArrow</span>
<a name="line-170"></a><span class='definition'>buildContentValidation</span> <span class='varid'>nd</span>
<a name="line-171"></a> <span class='keyglyph'>=</span> <span class='varid'>contentValidation</span> <span class='varid'>attrType</span> <span class='varid'>nd</span>
<a name="line-172"></a> <span class='keyword'>where</span>
<a name="line-173"></a> <span class='varid'>attrType</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_type</span> <span class='varop'>.</span> <span class='varid'>getDTDAttributes</span> <span class='varop'>$</span> <span class='varid'>nd</span>
<a name="line-174"></a>
<a name="line-175"></a>
<a name="line-176"></a> <span class='comment'>-- Delegates construction of the validation function on the basis of the</span>
<a name="line-177"></a> <span class='comment'>-- content model type</span>
<a name="line-178"></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'>XmlArrow</span>
<a name="line-179"></a> <span class='varid'>contentValidation</span> <span class='varid'>typ</span> <span class='varid'>dn</span>
<a name="line-180"></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-181"></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-182"></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-183"></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-184"></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-185"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-186"></a> <span class='keyword'>where</span>
<a name="line-187"></a> <span class='varid'>cs</span> <span class='keyglyph'>=</span> <span class='varid'>runLA</span> <span class='varid'>getChildren</span> <span class='varid'>dn</span>
<a name="line-188"></a>
<a name="line-189"></a> <span class='comment'>-- Checks #PCDATA content models</span>
<a name="line-190"></a> <span class='varid'>contentValidationPcdata</span> <span class='keyglyph'>::</span> <span class='conid'>XmlArrow</span>
<a name="line-191"></a> <span class='varid'>contentValidationPcdata</span>
<a name="line-192"></a> <span class='keyglyph'>=</span> <span class='varid'>isElem</span> <span class='varop'>`guards`</span> <span class='layout'>(</span><span class='varid'>contentVal</span> <span class='varop'>$<</span> <span class='varid'>getQName</span><span class='layout'>)</span>
<a name="line-193"></a> <span class='keyword'>where</span>
<a name="line-194"></a> <span class='varid'>contentVal</span> <span class='varid'>name</span>
<a name="line-195"></a> <span class='keyglyph'>=</span> <span class='varid'>checkRegex</span> <span class='layout'>(</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><span class='layout'>)</span>
<a name="line-196"></a> <span class='varop'>>>></span>
<a name="line-197"></a> <span class='varid'>msgToErr</span> <span class='layout'>(</span> <span class='layout'>(</span> <span class='str'>"The content of element "</span> <span class='varop'>++</span>
<a name="line-198"></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>
<a name="line-199"></a> <span class='str'>" must match (#PCDATA). "</span>
<a name="line-200"></a> <span class='layout'>)</span> <span class='varop'>++</span>
<a name="line-201"></a> <span class='layout'>)</span>
<a name="line-202"></a>
<a name="line-203"></a> <span class='comment'>-- Checks EMPTY content models</span>
<a name="line-204"></a> <span class='varid'>contentValidationEmpty</span> <span class='keyglyph'>::</span> <span class='conid'>XmlArrow</span>
<a name="line-205"></a> <span class='varid'>contentValidationEmpty</span>
<a name="line-206"></a> <span class='keyglyph'>=</span> <span class='varid'>isElem</span> <span class='varop'>`guards`</span> <span class='layout'>(</span><span class='varid'>contentVal</span> <span class='varop'>$<</span> <span class='varid'>getQName</span><span class='layout'>)</span>
<a name="line-207"></a> <span class='keyword'>where</span>
<a name="line-208"></a> <span class='varid'>contentVal</span> <span class='varid'>name</span>
<a name="line-209"></a> <span class='keyglyph'>=</span> <span class='varid'>checkRegex</span> <span class='varid'>re_unit</span>
<a name="line-210"></a> <span class='varop'>>>></span>
<a name="line-211"></a> <span class='varid'>msgToErr</span> <span class='layout'>(</span> <span class='layout'>(</span> <span class='str'>"The content of element "</span> <span class='varop'>++</span>
<a name="line-212"></a> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>qualifiedName</span> <span class='varid'>name</span><span class='layout'>)</span> <span class='varop'>++</span>
<a name="line-213"></a> <span class='str'>" must match EMPTY. "</span>
<a name="line-214"></a> <span class='layout'>)</span> <span class='varop'>++</span>
<a name="line-215"></a> <span class='layout'>)</span>
<a name="line-216"></a>
<a name="line-217"></a> <span class='comment'>-- Checks ANY content models</span>
<a name="line-218"></a> <span class='varid'>contentValidationAny</span> <span class='keyglyph'>::</span> <span class='conid'>XmlArrow</span>
<a name="line-219"></a> <span class='varid'>contentValidationAny</span>
<a name="line-220"></a> <span class='keyglyph'>=</span> <span class='varid'>isElem</span> <span class='varop'>`guards`</span> <span class='layout'>(</span><span class='varid'>contentVal</span> <span class='varop'>$<</span> <span class='varid'>getName</span><span class='layout'>)</span>
<a name="line-221"></a> <span class='keyword'>where</span>
<a name="line-222"></a> <span class='varid'>contentVal</span> <span class='varid'>name</span>
<a name="line-223"></a> <span class='keyglyph'>=</span> <span class='varid'>checkRegex</span> <span class='layout'>(</span><span class='varid'>re_rep</span> <span class='layout'>(</span><span class='varid'>re_dot</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-224"></a> <span class='varop'>>>></span>
<a name="line-225"></a> <span class='varid'>msgToErr</span> <span class='layout'>(</span> <span class='layout'>(</span> <span class='str'>"The content of element "</span> <span class='varop'>++</span>
<a name="line-226"></a> <span class='varid'>show</span> <span class='varid'>name</span> <span class='varop'>++</span>
<a name="line-227"></a> <span class='str'>" must match ANY. "</span>
<a name="line-228"></a> <span class='layout'>)</span> <span class='varop'>++</span>
<a name="line-229"></a> <span class='layout'>)</span>
<a name="line-230"></a>
<a name="line-231"></a> <span class='comment'>-- Checks "children" content models</span>
<a name="line-232"></a> <span class='varid'>contentValidationChildren</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-233"></a> <span class='varid'>contentValidationChildren</span> <span class='varid'>cm</span>
<a name="line-234"></a> <span class='keyglyph'>=</span> <span class='varid'>isElem</span> <span class='varop'>`guards`</span> <span class='layout'>(</span><span class='varid'>contentVal</span> <span class='varop'>$<</span> <span class='varid'>getName</span><span class='layout'>)</span>
<a name="line-235"></a> <span class='keyword'>where</span>
<a name="line-236"></a> <span class='varid'>contentVal</span> <span class='varid'>name</span>
<a name="line-237"></a> <span class='keyglyph'>=</span> <span class='varid'>checkRegex</span> <span class='varid'>re</span>
<a name="line-238"></a> <span class='varop'>>>></span>
<a name="line-239"></a> <span class='varid'>msgToErr</span> <span class='layout'>(</span> <span class='layout'>(</span> <span class='str'>"The content of element "</span> <span class='varop'>++</span>
<a name="line-240"></a> <span class='varid'>show</span> <span class='varid'>name</span> <span class='varop'>++</span>
<a name="line-241"></a> <span class='str'>" must match "</span> <span class='varop'>++</span> <span class='varid'>printRE</span> <span class='varid'>re</span> <span class='varop'>++</span> <span class='str'>". "</span>
<a name="line-242"></a> <span class='layout'>)</span> <span class='varop'>++</span>
<a name="line-243"></a> <span class='layout'>)</span>
<a name="line-244"></a> <span class='varid'>re</span> <span class='keyglyph'>=</span> <span class='varid'>createRE</span> <span class='layout'>(</span><span class='varid'>head</span> <span class='varid'>cm</span><span class='layout'>)</span>
<a name="line-245"></a>
<a name="line-246"></a> <span class='comment'>-- Checks "mixed content" content models</span>
<a name="line-247"></a> <span class='varid'>contentValidationMixed</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-248"></a> <span class='varid'>contentValidationMixed</span> <span class='varid'>cm</span>
<a name="line-249"></a> <span class='keyglyph'>=</span> <span class='varid'>isElem</span> <span class='varop'>`guards`</span> <span class='layout'>(</span><span class='varid'>contentVal</span> <span class='varop'>$<</span> <span class='varid'>getName</span><span class='layout'>)</span>
<a name="line-250"></a> <span class='keyword'>where</span>
<a name="line-251"></a> <span class='varid'>contentVal</span> <span class='varid'>name</span>
<a name="line-252"></a> <span class='keyglyph'>=</span> <span class='varid'>checkRegex</span> <span class='varid'>re</span>
<a name="line-253"></a> <span class='varop'>>>></span>
<a name="line-254"></a> <span class='varid'>msgToErr</span> <span class='layout'>(</span> <span class='layout'>(</span> <span class='str'>"The content of element "</span> <span class='varop'>++</span>
<a name="line-255"></a> <span class='varid'>show</span> <span class='varid'>name</span> <span class='varop'>++</span>
<a name="line-256"></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>
<a name="line-257"></a> <span class='layout'>)</span> <span class='varop'>++</span>
<a name="line-258"></a> <span class='layout'>)</span>
<a name="line-259"></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-260"></a>
<a name="line-261"></a><span class='comment'>-- |</span>
<a name="line-262"></a><span class='comment'>-- Build a regular expression from the content model. The regular expression</span>
<a name="line-263"></a><span class='comment'>-- is provided by the module XmlRE.</span>
<a name="line-264"></a><span class='comment'>--</span>
<a name="line-265"></a><span class='comment'>-- * 1.parameter nd : node of the content model. Expected: @CONTENT@ or</span>
<a name="line-266"></a><span class='comment'>-- @NAME@</span>
<a name="line-267"></a><span class='comment'>--</span>
<a name="line-268"></a><span class='comment'>-- - returns : regular expression of the content model</span>
<a name="line-269"></a>
<a name="line-270"></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-271"></a><span class='definition'>createRE</span> <span class='varid'>dn</span>
<a name="line-272"></a> <span class='keyglyph'>|</span> <span class='varid'>isDTDContentNode</span> <span class='varid'>dn</span>
<a name="line-273"></a> <span class='keyglyph'>=</span> <span class='varid'>processModifier</span> <span class='varid'>modifier</span>
<a name="line-274"></a> <span class='keyglyph'>|</span> <span class='varid'>isDTDNameNode</span> <span class='varid'>dn</span>
<a name="line-275"></a> <span class='keyglyph'>=</span> <span class='varid'>re_sym</span> <span class='varid'>name</span>
<a name="line-276"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-277"></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'>dn</span><span class='layout'>)</span>
<a name="line-278"></a> <span class='keyword'>where</span>
<a name="line-279"></a> <span class='varid'>al</span> <span class='keyglyph'>=</span> <span class='varid'>getDTDAttributes</span> <span class='varid'>dn</span>
<a name="line-280"></a> <span class='varid'>name</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al</span>
<a name="line-281"></a> <span class='varid'>modifier</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_modifier</span> <span class='varid'>al</span>
<a name="line-282"></a> <span class='varid'>kind</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_kind</span> <span class='varid'>al</span>
<a name="line-283"></a> <span class='varid'>cs</span> <span class='keyglyph'>=</span> <span class='varid'>runLA</span> <span class='varid'>getChildren</span> <span class='varid'>dn</span>
<a name="line-284"></a>
<a name="line-285"></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-286"></a> <span class='varid'>processModifier</span> <span class='varid'>m</span>
<a name="line-287"></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-288"></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-289"></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-290"></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-291"></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-292"></a>
<a name="line-293"></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-294"></a> <span class='varid'>processKind</span> <span class='varid'>k</span>
<a name="line-295"></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-296"></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-297"></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-298"></a>
<a name="line-299"></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-300"></a> <span class='varid'>makeSequence</span> <span class='conid'>[]</span> <span class='keyglyph'>=</span> <span class='varid'>re_unit</span>
<a name="line-301"></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-302"></a>
<a name="line-303"></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-304"></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-305"></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-306"></a>
<a name="line-307"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-308"></a>
<a name="line-309"></a><span class='comment'>-- |</span>
<a name="line-310"></a><span class='comment'>-- Build validation functions for the attributes of an element.</span>
<a name="line-311"></a><span class='comment'>--</span>
<a name="line-312"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-313"></a><span class='comment'>--</span>
<a name="line-314"></a><span class='comment'>-- - 2.parameter nd : element declaration for which the attribute validation functions</span>
<a name="line-315"></a><span class='comment'>-- are created</span>
<a name="line-316"></a><span class='comment'>--</span>
<a name="line-317"></a><span class='comment'>-- - returns : a function which takes an element (XTag), checks if its</span>
<a name="line-318"></a><span class='comment'>-- attributes are valid and returns a list of errors</span>
<a name="line-319"></a>
<a name="line-320"></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'>XmlArrow</span>
<a name="line-321"></a><span class='definition'>buildAttributeValidation</span> <span class='varid'>dtdPart</span> <span class='varid'>nd</span> <span class='keyglyph'>=</span>
<a name="line-322"></a> <span class='varid'>noDoublicateAttributes</span>
<a name="line-323"></a> <span class='varop'><+></span>
<a name="line-324"></a> <span class='varid'>checkNotDeclardAttributes</span> <span class='varid'>attrDecls</span> <span class='varid'>nd</span>
<a name="line-325"></a> <span class='varop'><+></span>
<a name="line-326"></a> <span class='varid'>checkRequiredAttributes</span> <span class='varid'>attrDecls</span> <span class='varid'>nd</span>
<a name="line-327"></a> <span class='varop'><+></span>
<a name="line-328"></a> <span class='varid'>checkFixedAttributes</span> <span class='varid'>attrDecls</span> <span class='varid'>nd</span>
<a name="line-329"></a> <span class='varop'><+></span>
<a name="line-330"></a> <span class='varid'>checkValuesOfAttributes</span> <span class='varid'>attrDecls</span> <span class='varid'>dtdPart</span> <span class='varid'>nd</span>
<a name="line-331"></a> <span class='keyword'>where</span>
<a name="line-332"></a> <span class='varid'>attrDecls</span> <span class='keyglyph'>=</span> <span class='varid'>isDTDAttlist</span> <span class='varop'>$$</span> <span class='varid'>dtdPart</span>
<a name="line-333"></a>
<a name="line-334"></a>
<a name="line-335"></a><span class='comment'>-- |</span>
<a name="line-336"></a><span class='comment'>-- Validate that all attributes of an element are unique.</span>
<a name="line-337"></a><span class='comment'>-- Well-formdness constraint: Unique AttSpec (3.1 \/ p.19 in Spec)</span>
<a name="line-338"></a><span class='comment'>--</span>
<a name="line-339"></a><span class='comment'>-- - returns : a function which takes an element (XTag), checks if its</span>
<a name="line-340"></a><span class='comment'>-- attributes are unique and returns a list of errors</span>
<a name="line-341"></a>
<a name="line-342"></a><a name="noDoublicateAttributes"></a><span class='definition'>noDoublicateAttributes</span> <span class='keyglyph'>::</span> <span class='conid'>XmlArrow</span>
<a name="line-343"></a><span class='definition'>noDoublicateAttributes</span>
<a name="line-344"></a> <span class='keyglyph'>=</span> <span class='varid'>isElem</span>
<a name="line-345"></a> <span class='varop'>`guards`</span>
<a name="line-346"></a> <span class='layout'>(</span> <span class='varid'>noDoubles'</span> <span class='varop'>$<</span> <span class='varid'>getName</span> <span class='layout'>)</span>
<a name="line-347"></a> <span class='keyword'>where</span>
<a name="line-348"></a> <span class='varid'>noDoubles'</span> <span class='varid'>elemName</span>
<a name="line-349"></a> <span class='keyglyph'>=</span> <span class='varid'>listA</span> <span class='layout'>(</span><span class='varid'>getAttrl</span> <span class='varop'>>>></span> <span class='varid'>getName</span><span class='layout'>)</span>
<a name="line-350"></a> <span class='varop'>>>></span> <span class='varid'>applyA</span> <span class='layout'>(</span><span class='varid'>arr</span> <span class='layout'>(</span><span class='varid'>catA</span> <span class='varop'>.</span> <span class='varid'>map</span> <span class='varid'>toErr</span> <span class='varop'>.</span> <span class='varid'>doubles</span> <span class='varop'>.</span> <span class='varid'>reverse</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-351"></a> <span class='keyword'>where</span>
<a name="line-352"></a> <span class='varid'>toErr</span> <span class='varid'>n1</span> <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='varid'>n1</span> <span class='varop'>++</span>
<a name="line-353"></a> <span class='str'>" was already specified for element "</span> <span class='varop'>++</span>
<a name="line-354"></a> <span class='varid'>show</span> <span class='varid'>elemName</span> <span class='varop'>++</span> <span class='str'>"."</span>
<a name="line-355"></a> <span class='layout'>)</span>
<a name="line-356"></a>
<a name="line-357"></a><span class='comment'>-- |</span>
<a name="line-358"></a><span class='comment'>-- Validate that all \#REQUIRED attributes are provided.</span>
<a name="line-359"></a><span class='comment'>-- Validity constraint: Required Attributes (3.3.2 \/ p.28 in Spec)</span>
<a name="line-360"></a><span class='comment'>--</span>
<a name="line-361"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-362"></a><span class='comment'>--</span>
<a name="line-363"></a><span class='comment'>-- - 2.parameter nd : element declaration which attributes have to be checked</span>
<a name="line-364"></a><span class='comment'>--</span>
<a name="line-365"></a><span class='comment'>-- - returns : a function which takes an element (XTag), checks if all</span>
<a name="line-366"></a><span class='comment'>-- required attributes are provided and returns a list of errors</span>
<a name="line-367"></a>
<a name="line-368"></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'>XmlArrow</span>
<a name="line-369"></a><span class='definition'>checkRequiredAttributes</span> <span class='varid'>attrDecls</span> <span class='varid'>dn</span>
<a name="line-370"></a> <span class='keyglyph'>|</span> <span class='varid'>isDTDElementNode</span> <span class='varid'>dn</span>
<a name="line-371"></a> <span class='keyglyph'>=</span> <span class='varid'>isElem</span>
<a name="line-372"></a> <span class='varop'>`guards`</span>
<a name="line-373"></a> <span class='layout'>(</span> <span class='varid'>checkRequired</span> <span class='varop'>$<</span> <span class='varid'>getName</span> <span class='layout'>)</span>
<a name="line-374"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-375"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-376"></a> <span class='keyword'>where</span>
<a name="line-377"></a> <span class='varid'>elemName</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varop'>.</span> <span class='varid'>getDTDAttributes</span> <span class='varop'>$</span> <span class='varid'>dn</span>
<a name="line-378"></a> <span class='varid'>requiredAtts</span> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='varid'>isAttlistOfElement</span> <span class='varid'>elemName</span> <span class='varop'>>>></span> <span class='varid'>isRequiredAttrKind</span><span class='layout'>)</span> <span class='varop'>$$</span> <span class='varid'>attrDecls</span>
<a name="line-379"></a>
<a name="line-380"></a> <span class='varid'>checkRequired</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-381"></a> <span class='varid'>checkRequired</span> <span class='varid'>name</span>
<a name="line-382"></a> <span class='keyglyph'>=</span> <span class='varid'>catA</span> <span class='varop'>.</span> <span class='varid'>map</span> <span class='varid'>checkReq</span> <span class='varop'>$</span> <span class='varid'>requiredAtts</span>
<a name="line-383"></a> <span class='keyword'>where</span>
<a name="line-384"></a> <span class='varid'>checkReq</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-385"></a> <span class='varid'>checkReq</span> <span class='varid'>attrDecl</span>
<a name="line-386"></a> <span class='keyglyph'>=</span> <span class='varid'>neg</span> <span class='layout'>(</span><span class='varid'>hasAttr</span> <span class='varid'>attName</span><span class='layout'>)</span>
<a name="line-387"></a> <span class='varop'>`guards`</span>
<a name="line-388"></a> <span class='varid'>err</span> <span class='layout'>(</span> <span class='str'>"Attribute "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>attName</span> <span class='varop'>++</span> <span class='str'>" must be declared for element type "</span> <span class='varop'>++</span>
<a name="line-389"></a> <span class='varid'>show</span> <span class='varid'>name</span> <span class='varop'>++</span> <span class='str'>"."</span> <span class='layout'>)</span>
<a name="line-390"></a> <span class='keyword'>where</span>
<a name="line-391"></a> <span class='varid'>attName</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_value</span> <span class='varop'>.</span> <span class='varid'>getDTDAttributes</span> <span class='varop'>$</span> <span class='varid'>attrDecl</span>
<a name="line-392"></a>
<a name="line-393"></a><span class='comment'>-- |</span>
<a name="line-394"></a><span class='comment'>-- Validate that \#FIXED attributes match the default value.</span>
<a name="line-395"></a><span class='comment'>-- Validity constraint: Fixed Attribute Default (3.3.2 \/ p.28 in Spec)</span>
<a name="line-396"></a><span class='comment'>--</span>
<a name="line-397"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-398"></a><span class='comment'>--</span>
<a name="line-399"></a><span class='comment'>-- - 2.parameter nd : element declaration which attributes have to be checked</span>
<a name="line-400"></a><span class='comment'>--</span>
<a name="line-401"></a><span class='comment'>-- - returns : a function which takes an element (XTag), checks if all</span>
<a name="line-402"></a><span class='comment'>-- fixed attributes match the default value and returns a list of errors</span>
<a name="line-403"></a>
<a name="line-404"></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'>XmlArrow</span>
<a name="line-405"></a><span class='definition'>checkFixedAttributes</span> <span class='varid'>attrDecls</span> <span class='varid'>dn</span>
<a name="line-406"></a> <span class='keyglyph'>|</span> <span class='varid'>isDTDElementNode</span> <span class='varid'>dn</span>
<a name="line-407"></a> <span class='keyglyph'>=</span> <span class='varid'>isElem</span>
<a name="line-408"></a> <span class='varop'>`guards`</span>
<a name="line-409"></a> <span class='layout'>(</span> <span class='varid'>checkFixed</span> <span class='varop'>$<</span> <span class='varid'>getName</span> <span class='layout'>)</span>
<a name="line-410"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-411"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-412"></a> <span class='keyword'>where</span>
<a name="line-413"></a> <span class='varid'>elemName</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varop'>.</span> <span class='varid'>getDTDAttributes</span> <span class='varop'>$</span> <span class='varid'>dn</span>
<a name="line-414"></a> <span class='varid'>fixedAtts</span> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='varid'>isAttlistOfElement</span> <span class='varid'>elemName</span> <span class='varop'>>>></span> <span class='varid'>isFixedAttrKind</span><span class='layout'>)</span> <span class='varop'>$$</span> <span class='varid'>attrDecls</span>
<a name="line-415"></a>
<a name="line-416"></a> <span class='varid'>checkFixed</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-417"></a> <span class='varid'>checkFixed</span> <span class='varid'>name</span>
<a name="line-418"></a> <span class='keyglyph'>=</span> <span class='varid'>catA</span> <span class='varop'>.</span> <span class='varid'>map</span> <span class='varid'>checkFix</span> <span class='varop'>$</span> <span class='varid'>fixedAtts</span>
<a name="line-419"></a> <span class='keyword'>where</span>
<a name="line-420"></a> <span class='varid'>checkFix</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-421"></a> <span class='varid'>checkFix</span> <span class='varid'>an</span>
<a name="line-422"></a> <span class='keyglyph'>|</span> <span class='varid'>isDTDAttlistNode</span> <span class='varid'>an</span>
<a name="line-423"></a> <span class='keyglyph'>=</span> <span class='varid'>checkFixedVal</span> <span class='varop'>$<</span> <span class='varid'>getAttrValue</span> <span class='varid'>attName</span>
<a name="line-424"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-425"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-426"></a> <span class='keyword'>where</span>
<a name="line-427"></a> <span class='varid'>al'</span> <span class='keyglyph'>=</span> <span class='varid'>getDTDAttributes</span> <span class='varid'>an</span>
<a name="line-428"></a> <span class='varid'>attName</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_value</span> <span class='varid'>al'</span>
<a name="line-429"></a> <span class='varid'>defa</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_default</span> <span class='varid'>al'</span>
<a name="line-430"></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'>an</span><span class='layout'>)</span> <span class='varid'>defa</span>
<a name="line-431"></a>
<a name="line-432"></a> <span class='varid'>checkFixedVal</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-433"></a> <span class='varid'>checkFixedVal</span> <span class='varid'>val</span>
<a name="line-434"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span> <span class='layout'>(</span> <span class='varid'>hasAttr</span> <span class='varid'>attName</span>
<a name="line-435"></a> <span class='varop'>>>></span>
<a name="line-436"></a> <span class='varid'>isA</span> <span class='layout'>(</span><span class='varid'>const</span> <span class='layout'>(</span><span class='varid'>attValue</span> <span class='varop'>/=</span> <span class='varid'>fixedValue</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-437"></a> <span class='layout'>)</span>
<a name="line-438"></a> <span class='varop'>`guards`</span>
<a name="line-439"></a> <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='varid'>name</span> <span class='varop'>++</span>
<a name="line-440"></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-441"></a> <span class='varid'>show</span> <span class='varid'>fixedValue</span> <span class='varop'>++</span> <span class='str'>"."</span> <span class='layout'>)</span>
<a name="line-442"></a> <span class='layout'>)</span>
<a name="line-443"></a> <span class='keyword'>where</span>
<a name="line-444"></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'>an</span><span class='layout'>)</span> <span class='varid'>val</span>
<a name="line-445"></a>
<a name="line-446"></a><span class='comment'>-- |</span>
<a name="line-447"></a><span class='comment'>-- Validate that an element has no attributes which are not declared.</span>
<a name="line-448"></a><span class='comment'>-- Validity constraint: Attribute Value Type (3.1 \/ p.19 in Spec)</span>
<a name="line-449"></a><span class='comment'>--</span>
<a name="line-450"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-451"></a><span class='comment'>--</span>
<a name="line-452"></a><span class='comment'>-- - 2.parameter nd : element declaration which attributes have to be checked</span>
<a name="line-453"></a><span class='comment'>--</span>
<a name="line-454"></a><span class='comment'>-- - returns : a function which takes an element (XTag), checks if all</span>
<a name="line-455"></a><span class='comment'>-- attributes are declared and returns a list of errors</span>
<a name="line-456"></a>
<a name="line-457"></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'>XmlArrow</span>
<a name="line-458"></a><span class='definition'>checkNotDeclardAttributes</span> <span class='varid'>attrDecls</span> <span class='varid'>elemDescr</span>
<a name="line-459"></a> <span class='keyglyph'>=</span> <span class='varid'>checkNotDeclared</span>
<a name="line-460"></a> <span class='keyword'>where</span>
<a name="line-461"></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-462"></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-463"></a>
<a name="line-464"></a> <span class='varid'>checkNotDeclared</span> <span class='keyglyph'>::</span> <span class='conid'>XmlArrow</span>
<a name="line-465"></a> <span class='varid'>checkNotDeclared</span>
<a name="line-466"></a> <span class='keyglyph'>=</span> <span class='varid'>isElem</span>
<a name="line-467"></a> <span class='varop'>`guards`</span>
<a name="line-468"></a> <span class='layout'>(</span> <span class='varid'>getAttrl</span> <span class='varop'>>>></span> <span class='varid'>searchForDeclaredAtt</span> <span class='varid'>elemName</span> <span class='varid'>decls</span> <span class='layout'>)</span>
<a name="line-469"></a>
<a name="line-470"></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'>XmlArrow</span>
<a name="line-471"></a> <span class='varid'>searchForDeclaredAtt</span> <span class='varid'>name</span> <span class='layout'>(</span><span class='varid'>dn</span> <span class='conop'>:</span> <span class='varid'>xs</span><span class='layout'>)</span>
<a name="line-472"></a> <span class='keyglyph'>|</span> <span class='varid'>isDTDAttlistNode</span> <span class='varid'>dn</span>
<a name="line-473"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span> <span class='varid'>getName</span> <span class='varop'>>>></span> <span class='varid'>isA</span> <span class='layout'>(</span> <span class='layout'>(</span><span class='varid'>dtd_value</span> <span class='varop'>.</span> <span class='varid'>getDTDAttributes</span> <span class='varop'>$</span> <span class='varid'>dn</span><span class='layout'>)</span> <span class='varop'>/=</span> <span class='layout'>)</span> <span class='layout'>)</span>
<a name="line-474"></a> <span class='varop'>`guards`</span>
<a name="line-475"></a> <span class='varid'>searchForDeclaredAtt</span> <span class='varid'>name</span> <span class='varid'>xs</span>
<a name="line-476"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-477"></a> <span class='keyglyph'>=</span> <span class='varid'>searchForDeclaredAtt</span> <span class='varid'>name</span> <span class='varid'>xs</span>
<a name="line-478"></a>
<a name="line-479"></a> <span class='varid'>searchForDeclaredAtt</span> <span class='varid'>name</span> <span class='conid'>[]</span>
<a name="line-480"></a> <span class='keyglyph'>=</span> <span class='varid'>mkErr</span> <span class='varop'>$<</span> <span class='varid'>getName</span>
<a name="line-481"></a> <span class='keyword'>where</span>
<a name="line-482"></a> <span class='varid'>mkErr</span> <span class='varid'>n</span> <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='varid'>n</span> <span class='varop'>++</span> <span class='str'>" of element "</span> <span class='varop'>++</span>
<a name="line-483"></a> <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-484"></a>
<a name="line-485"></a><span class='comment'>-- |</span>
<a name="line-486"></a><span class='comment'>-- Validate that the attribute value meets the lexical constraints of its type.</span>
<a name="line-487"></a><span class='comment'>-- Validity constaint: Attribute Value Type (3.1 \/ p.19 in Spec)</span>
<a name="line-488"></a><span class='comment'>--</span>
<a name="line-489"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-490"></a><span class='comment'>--</span>
<a name="line-491"></a><span class='comment'>-- - 2.parameter nd : element declaration which attributes have to be checked</span>
<a name="line-492"></a><span class='comment'>--</span>
<a name="line-493"></a><span class='comment'>-- - returns : a function which takes an element (XTag), checks if all</span>
<a name="line-494"></a><span class='comment'>-- attributes meet the lexical constraints and returns a list of errors</span>
<a name="line-495"></a>
<a name="line-496"></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'>XmlArrow</span>
<a name="line-497"></a><span class='definition'>checkValuesOfAttributes</span> <span class='varid'>attrDecls</span> <span class='varid'>dtdPart</span> <span class='varid'>elemDescr</span>
<a name="line-498"></a> <span class='keyglyph'>=</span> <span class='varid'>checkValues</span>
<a name="line-499"></a> <span class='keyword'>where</span>
<a name="line-500"></a> <span class='varid'>elemName</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varop'>.</span> <span class='varid'>getDTDAttributes</span> <span class='varop'>$</span> <span class='varid'>elemDescr</span>
<a name="line-501"></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-502"></a>
<a name="line-503"></a> <span class='varid'>checkValues</span> <span class='keyglyph'>::</span> <span class='conid'>XmlArrow</span>
<a name="line-504"></a> <span class='varid'>checkValues</span>
<a name="line-505"></a> <span class='keyglyph'>=</span> <span class='varid'>isElem</span>
<a name="line-506"></a> <span class='varop'>`guards`</span>
<a name="line-507"></a> <span class='layout'>(</span> <span class='varid'>checkValue</span> <span class='varop'>$<</span> <span class='varid'>getAttrl</span> <span class='layout'>)</span>
<a name="line-508"></a>
<a name="line-509"></a> <span class='varid'>checkValue</span> <span class='varid'>att</span>
<a name="line-510"></a> <span class='keyglyph'>=</span> <span class='varid'>catA</span> <span class='varop'>.</span> <span class='varid'>map</span> <span class='varid'>checkVal</span> <span class='varop'>$</span> <span class='varid'>decls</span>
<a name="line-511"></a> <span class='keyword'>where</span>
<a name="line-512"></a> <span class='varid'>checkVal</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-513"></a> <span class='varid'>checkVal</span> <span class='varid'>attrDecl</span>
<a name="line-514"></a> <span class='keyglyph'>|</span> <span class='varid'>isDTDAttlistNode</span> <span class='varid'>attrDecl</span>
<a name="line-515"></a> <span class='varop'>&&</span>
<a name="line-516"></a> <span class='varid'>nameOfAttr</span> <span class='varid'>att</span> <span class='varop'>==</span> <span class='varid'>dtd_value</span> <span class='varid'>al'</span>
<a name="line-517"></a> <span class='keyglyph'>=</span> <span class='varid'>checkAttributeValue</span> <span class='varid'>dtdPart</span> <span class='varid'>attrDecl</span>
<a name="line-518"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-519"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-520"></a> <span class='keyword'>where</span>
<a name="line-521"></a> <span class='varid'>al'</span> <span class='keyglyph'>=</span> <span class='varid'>getDTDAttributes</span> <span class='varid'>attrDecl</span>
<a name="line-522"></a>
<a name="line-523"></a><span class='comment'>-- ------------------------------------------------------------</span>
</pre></body>
</html>