hxt-8.0.0: doc/hdoc/src/Text-XML-HXT-Validator-IdValidation.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 checking special ID/IDREF/IDREFS constraints.</span>
<a name="line-3"></a>
<a name="line-4"></a><span class='comment'>-- Checking special ID/IDREF/IDREFS constraints means:</span>
<a name="line-5"></a><span class='comment'>--</span>
<a name="line-6"></a><span class='comment'>-- - checking that all ID values are unique.</span>
<a name="line-7"></a><span class='comment'>--</span>
<a name="line-8"></a><span class='comment'>-- - checking that all IDREF/IDREFS values match the value of some ID attribute</span>
<a name="line-9"></a><span class='comment'>--</span>
<a name="line-10"></a>
<a name="line-11"></a>
<a name="line-12"></a><span class='comment'>-- ID-Validation should be started before or after validating the document.</span>
<a name="line-13"></a>
<a name="line-14"></a>
<a name="line-15"></a><span class='comment'>-- First all nodes with ID attributes are collected from the document, then</span>
<a name="line-16"></a><span class='comment'>-- it is validated that values of ID attributes do not occure more than once.</span>
<a name="line-17"></a><span class='comment'>-- During a second iteration over the document it is validated that there exists</span>
<a name="line-18"></a><span class='comment'>-- an ID attribute value for IDREF/IDREFS attribute values.</span>
<a name="line-19"></a>
<a name="line-20"></a><span class='comment'>-- Special namings in source code:</span>
<a name="line-21"></a><span class='comment'>--</span>
<a name="line-22"></a><span class='comment'>-- - nd - XDTD node</span>
<a name="line-23"></a><span class='comment'>--</span>
<a name="line-24"></a><span class='comment'>-- - n - XTag node</span>
<a name="line-25"></a><span class='comment'>--</span>
<a name="line-26"></a><span class='comment'>-- Author : .\\artin Schmidt</span>
<a name="line-27"></a><span class='comment'>-- Version : $Id: IdValidation.hs,v 1.1 2004/09/02 19:12:03 hxml Exp $</span>
<a name="line-28"></a>
<a name="line-29"></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'>IdValidation</span>
<a name="line-30"></a> <span class='layout'>(</span> <span class='varid'>validateIds</span>
<a name="line-31"></a> <span class='layout'>)</span>
<a name="line-32"></a><span class='keyword'>where</span>
<a name="line-33"></a>
<a name="line-34"></a>
<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'>DOM</span><span class='varop'>.</span><span class='conid'>XmlTree</span>
<a name="line-36"></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-37"></a>
<a name="line-38"></a>
<a name="line-39"></a>
<a name="line-40"></a><span class='comment'>-- |</span>
<a name="line-41"></a><span class='comment'>-- Lookup-table which maps element names to their validation functions. The</span>
<a name="line-42"></a><span class='comment'>-- validation functions are XmlFilters.</span>
<a name="line-43"></a>
<a name="line-44"></a><a name="IdEnvTable"></a><span class='keyword'>type</span> <span class='conid'>IdEnvTable</span> <span class='keyglyph'>=</span> <span class='keyglyph'>[</span><span class='conid'>IdEnv</span><span class='keyglyph'>]</span>
<a name="line-45"></a><a name="IdEnv"></a><span class='keyword'>type</span> <span class='conid'>IdEnv</span> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='conid'>ElemName</span><span class='layout'>,</span> <span class='conid'>IdFct</span><span class='layout'>)</span>
<a name="line-46"></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-47"></a><a name="IdFct"></a><span class='keyword'>type</span> <span class='conid'>IdFct</span> <span class='keyglyph'>=</span> <span class='conid'>XmlFilter</span>
<a name="line-48"></a>
<a name="line-49"></a>
<a name="line-50"></a>
<a name="line-51"></a><span class='comment'>-- |</span>
<a name="line-52"></a><span class='comment'>-- Perform the validation of the ID/IDREF/IDREFS constraints.</span>
<a name="line-53"></a><span class='comment'>--</span>
<a name="line-54"></a><span class='comment'>-- * 1.parameter dtdPart : the DTD subset (Node @DOCTYPE@) of the XmlTree</span>
<a name="line-55"></a><span class='comment'>--</span>
<a name="line-56"></a><span class='comment'>-- - 2.parameter doc : the document subset of the XmlTree</span>
<a name="line-57"></a><span class='comment'>--</span>
<a name="line-58"></a><span class='comment'>-- - returns : a list of errors</span>
<a name="line-59"></a>
<a name="line-60"></a><a name="validateIds"></a><span class='definition'>validateIds</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-61"></a><span class='definition'>validateIds</span> <span class='varid'>dtdPart</span> <span class='varid'>doc</span>
<a name="line-62"></a> <span class='keyglyph'>=</span> <span class='comment'>{-# SCC "checkForUniqueIds" #-}</span> <span class='varid'>checkForUniqueIds</span> <span class='varid'>idNodeList</span> <span class='varid'>dtdNodes</span>
<a name="line-63"></a> <span class='varop'>++</span>
<a name="line-64"></a> <span class='comment'>{-# SCC "checkIdReferences" #-}</span> <span class='varid'>checkIdReferences</span> <span class='varid'>idRefEnv</span> <span class='varid'>doc</span>
<a name="line-65"></a> <span class='keyword'>where</span>
<a name="line-66"></a> <span class='varid'>idEnv</span> <span class='keyglyph'>=</span> <span class='varid'>buildIdCollectorFcts</span> <span class='varid'>dtdNodes</span>
<a name="line-67"></a> <span class='varid'>idRefEnv</span> <span class='keyglyph'>=</span> <span class='varid'>buildIdrefValidationFcts</span> <span class='varid'>dtdNodes</span> <span class='varid'>idNodeList</span>
<a name="line-68"></a> <span class='varid'>idNodeList</span> <span class='keyglyph'>=</span> <span class='varid'>traverseTree</span> <span class='varid'>idEnv</span> <span class='varid'>doc</span>
<a name="line-69"></a> <span class='varid'>dtdNodes</span> <span class='keyglyph'>=</span> <span class='varid'>getChildren</span> <span class='varid'>dtdPart</span>
<a name="line-70"></a>
<a name="line-71"></a>
<a name="line-72"></a><span class='comment'>-- |</span>
<a name="line-73"></a><span class='comment'>-- Traverse the XmlTree in preorder.</span>
<a name="line-74"></a><span class='comment'>--</span>
<a name="line-75"></a><span class='comment'>-- * 1.parameter idEnv : lookup-table which maps element names to their validation functions</span>
<a name="line-76"></a><span class='comment'>--</span>
<a name="line-77"></a><span class='comment'>-- - returns : list of errors</span>
<a name="line-78"></a>
<a name="line-79"></a><a name="traverseTree"></a><span class='definition'>traverseTree</span> <span class='keyglyph'>::</span> <span class='conid'>IdEnvTable</span> <span class='keyglyph'>-></span> <span class='conid'>XmlFilter</span>
<a name="line-80"></a><span class='definition'>traverseTree</span> <span class='varid'>idEnv</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-81"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='varid'>idFct</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'>idEnv</span><span class='layout'>)</span> <span class='varid'>cs</span>
<a name="line-82"></a> <span class='keyword'>where</span>
<a name="line-83"></a> <span class='varid'>idFct</span> <span class='keyglyph'>::</span> <span class='conid'>XmlFilter</span>
<a name="line-84"></a> <span class='varid'>idFct</span>
<a name="line-85"></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'>idEnv</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'>none</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='definition'>traverseTree</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>[]</span>
<a name="line-90"></a>
<a name="line-91"></a>
<a name="line-92"></a>
<a name="line-93"></a><span class='comment'>-- |</span>
<a name="line-94"></a><span class='comment'>-- Returns the value of an element's ID attribute. The attribute name has to be</span>
<a name="line-95"></a><span class='comment'>-- retrieved first from the DTD.</span>
<a name="line-96"></a><span class='comment'>--</span>
<a name="line-97"></a><span class='comment'>-- * 1.parameter dtdPart : list of ID attribute definitions from the DTD</span>
<a name="line-98"></a><span class='comment'>--</span>
<a name="line-99"></a><span class='comment'>-- - 2.parameter n : element which ID attribute value should be returned</span>
<a name="line-100"></a><span class='comment'>--</span>
<a name="line-101"></a><span class='comment'>-- - returns : normalized value of the ID attribute</span>
<a name="line-102"></a>
<a name="line-103"></a><a name="getIdValue"></a><span class='definition'>getIdValue</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'>String</span>
<a name="line-104"></a><span class='definition'>getIdValue</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='sel'>_al'</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span>
<a name="line-105"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</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='varid'>elemName</span>
<a name="line-106"></a> <span class='keyword'>then</span> <span class='varid'>attrValue</span>
<a name="line-107"></a> <span class='keyword'>else</span> <span class='varid'>getIdValue</span> <span class='varid'>xs</span> <span class='varid'>n</span>
<a name="line-108"></a> <span class='keyword'>where</span>
<a name="line-109"></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-110"></a> <span class='varid'>attrName</span> <span class='keyglyph'>=</span> <span class='varid'>lookup1</span> <span class='varid'>a_value</span> <span class='varid'>al</span>
<a name="line-111"></a> <span class='varid'>attrValue</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'>attrName</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-112"></a>
<a name="line-113"></a><span class='definition'>getIdValue</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='str'>""</span>
<a name="line-114"></a>
<a name="line-115"></a>
<a name="line-116"></a>
<a name="line-117"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-118"></a>
<a name="line-119"></a>
<a name="line-120"></a><span class='comment'>-- |</span>
<a name="line-121"></a><span class='comment'>-- Build collector functions which return XTag nodes with ID attributes from</span>
<a name="line-122"></a><span class='comment'>-- a document.</span>
<a name="line-123"></a><span class='comment'>--</span>
<a name="line-124"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-125"></a><span class='comment'>--</span>
<a name="line-126"></a><span class='comment'>-- - returns : lookup-table which maps element names to their collector function</span>
<a name="line-127"></a>
<a name="line-128"></a><a name="buildIdCollectorFcts"></a><span class='definition'>buildIdCollectorFcts</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>IdEnvTable</span>
<a name="line-129"></a><span class='definition'>buildIdCollectorFcts</span> <span class='varid'>dtdPart</span>
<a name="line-130"></a> <span class='keyglyph'>=</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>buildIdCollectorFct</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>isIdAttrType</span> <span class='varop'>$$</span> <span class='varid'>dtdPart</span><span class='layout'>)</span>
<a name="line-131"></a> <span class='keyword'>where</span>
<a name="line-132"></a> <span class='varid'>buildIdCollectorFct</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>IdEnv</span>
<a name="line-133"></a> <span class='varid'>buildIdCollectorFct</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>
<a name="line-134"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='varid'>elemName</span><span class='layout'>,</span> <span class='varid'>hasAttr</span> <span class='varid'>attrName</span><span class='layout'>)</span>
<a name="line-135"></a> <span class='keyword'>where</span>
<a name="line-136"></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-137"></a> <span class='varid'>attrName</span> <span class='keyglyph'>=</span> <span class='varid'>lookup1</span> <span class='varid'>a_value</span> <span class='varid'>al</span>
<a name="line-138"></a>
<a name="line-139"></a> <span class='varid'>buildIdCollectorFct</span> <span class='varid'>nd</span>
<a name="line-140"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"buildIdCollectorFct: 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-141"></a>
<a name="line-142"></a>
<a name="line-143"></a><span class='comment'>-- |</span>
<a name="line-144"></a><span class='comment'>-- Build validation functions for checking if IDREF\/IDREFS values match a value</span>
<a name="line-145"></a><span class='comment'>-- of some ID attributes.</span>
<a name="line-146"></a><span class='comment'>--</span>
<a name="line-147"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-148"></a><span class='comment'>--</span>
<a name="line-149"></a><span class='comment'>-- - 2.parameter idNodeList : list of all XTag nodes with ID attributes</span>
<a name="line-150"></a><span class='comment'>--</span>
<a name="line-151"></a><span class='comment'>-- - returns : lookup-table which maps element names to their validation function</span>
<a name="line-152"></a>
<a name="line-153"></a><a name="buildIdrefValidationFcts"></a><span class='definition'>buildIdrefValidationFcts</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'>IdEnvTable</span>
<a name="line-154"></a><span class='definition'>buildIdrefValidationFcts</span> <span class='varid'>dtdPart</span> <span class='varid'>idNodeList</span>
<a name="line-155"></a> <span class='keyglyph'>=</span> <span class='varid'>map</span> <span class='varid'>buildElemValidationFct</span> <span class='varid'>elements</span>
<a name="line-156"></a> <span class='keyword'>where</span>
<a name="line-157"></a> <span class='varid'>elements</span> <span class='keyglyph'>=</span> <span class='varid'>isElement</span> <span class='varop'>$$</span> <span class='varid'>dtdPart</span>
<a name="line-158"></a> <span class='varid'>idValueList</span> <span class='keyglyph'>=</span> <span class='varid'>getIdValues</span> <span class='layout'>(</span><span class='varid'>isIdAttrType</span> <span class='varop'>$$</span> <span class='varid'>dtdPart</span><span class='layout'>)</span>
<a name="line-159"></a>
<a name="line-160"></a> <span class='varid'>getIdValues</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span>
<a name="line-161"></a> <span class='varid'>getIdValues</span> <span class='varid'>idAttrTypes</span>
<a name="line-162"></a> <span class='keyglyph'>=</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>getIdValue</span> <span class='varid'>idAttrTypes</span><span class='layout'>)</span> <span class='varid'>idNodeList</span>
<a name="line-163"></a>
<a name="line-164"></a>
<a name="line-165"></a> <span class='varid'>buildElemValidationFct</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>IdEnv</span>
<a name="line-166"></a> <span class='varid'>buildElemValidationFct</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-167"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='varid'>elemName</span><span class='layout'>,</span> <span class='varid'>buildIdrefValidationFct</span> <span class='varid'>idRefAttrTypes</span><span class='layout'>)</span>
<a name="line-168"></a> <span class='keyword'>where</span>
<a name="line-169"></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-170"></a> <span class='varid'>idRefAttrTypes</span> <span class='keyglyph'>=</span> <span class='varid'>isIdRefAttrType</span> <span class='varop'>$$</span> <span class='layout'>(</span><span class='varid'>isAttlistOfElement</span> <span class='varid'>elemName</span><span class='layout'>)</span> <span class='varop'>$$</span> <span class='varid'>dtdPart</span>
<a name="line-171"></a>
<a name="line-172"></a> <span class='varid'>buildElemValidationFct</span> <span class='varid'>nd</span>
<a name="line-173"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"buildIdrefValidationFct: 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-174"></a>
<a name="line-175"></a>
<a name="line-176"></a> <span class='varid'>buildIdrefValidationFct</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlFilter</span>
<a name="line-177"></a> <span class='varid'>buildIdrefValidationFct</span> <span class='layout'>(</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'>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>
<a name="line-178"></a> <span class='keyglyph'>=</span> <span class='varid'>checkIdref</span> <span class='varop'>+++</span> <span class='varid'>buildIdrefValidationFct</span> <span class='varid'>xs</span>
<a name="line-179"></a> <span class='keyword'>where</span>
<a name="line-180"></a> <span class='varid'>attrName</span> <span class='keyglyph'>=</span> <span class='varid'>lookup1</span> <span class='varid'>a_value</span> <span class='varid'>al</span>
<a name="line-181"></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-182"></a>
<a name="line-183"></a> <span class='varid'>checkIdref</span> <span class='keyglyph'>::</span> <span class='conid'>XmlFilter</span>
<a name="line-184"></a> <span class='varid'>checkIdref</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-185"></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'>attrName</span><span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-186"></a> <span class='keyword'>then</span> <span class='keyword'>if</span> <span class='varid'>attrType</span> <span class='varop'>==</span> <span class='varid'>k_idref</span>
<a name="line-187"></a> <span class='keyword'>then</span> <span class='varid'>checkValueDeclared</span> <span class='varid'>n</span> <span class='varid'>attrValue</span>
<a name="line-188"></a> <span class='keyword'>else</span> <span class='keyword'>let</span> <span class='varid'>valueList</span> <span class='keyglyph'>=</span> <span class='varid'>words</span> <span class='varid'>attrValue</span>
<a name="line-189"></a> <span class='keyword'>in</span> <span class='keyword'>if</span> <span class='varid'>null</span> <span class='varid'>valueList</span>
<a name="line-190"></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'>attrName</span> <span class='varop'>++</span>
<a name="line-191"></a> <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-192"></a> <span class='str'>" must have at least one name."</span><span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-193"></a> <span class='keyword'>else</span> <span class='varid'>concatMap</span> <span class='layout'>(</span><span class='varid'>checkValueDeclared</span> <span class='varid'>n</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>words</span> <span class='varid'>attrValue</span><span class='layout'>)</span>
<a name="line-194"></a> <span class='keyword'>else</span> <span class='conid'>[]</span>
<a name="line-195"></a> <span class='keyword'>where</span>
<a name="line-196"></a> <span class='varid'>attrValue</span> <span class='keyglyph'>=</span> <span class='varid'>normalizeAttributeValue</span> <span class='layout'>(</span><span class='conid'>Just</span> <span class='varid'>nd</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>valueOf</span> <span class='varid'>attrName</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-197"></a>
<a name="line-198"></a> <span class='varid'>checkIdref</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>[]</span>
<a name="line-199"></a>
<a name="line-200"></a>
<a name="line-201"></a> <span class='varid'>checkValueDeclared</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTrees</span>
<a name="line-202"></a> <span class='varid'>checkValueDeclared</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> <span class='varid'>attrValue</span>
<a name="line-203"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>attrValue</span> <span class='varop'>`elem`</span> <span class='varid'>idValueList</span>
<a name="line-204"></a> <span class='keyword'>then</span> <span class='conid'>[]</span>
<a name="line-205"></a> <span class='keyword'>else</span> <span class='varid'>err</span> <span class='layout'>(</span><span class='str'>"An Element with identifier "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>attrValue</span> <span class='varop'>++</span>
<a name="line-206"></a> <span class='str'>" must appear in the document."</span><span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-207"></a>
<a name="line-208"></a> <span class='varid'>checkValueDeclared</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>[]</span>
<a name="line-209"></a>
<a name="line-210"></a> <span class='varid'>buildIdrefValidationFct</span> <span class='conid'>[]</span>
<a name="line-211"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-212"></a>
<a name="line-213"></a> <span class='varid'>buildIdrefValidationFct</span> <span class='varid'>nd</span>
<a name="line-214"></a> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"buildIdCollectorFct: 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-215"></a>
<a name="line-216"></a>
<a name="line-217"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-218"></a>
<a name="line-219"></a>
<a name="line-220"></a><span class='comment'>-- |</span>
<a name="line-221"></a><span class='comment'>-- Validate that all ID values are unique within a document.</span>
<a name="line-222"></a><span class='comment'>-- Validity constraint: ID (3.3.1 \/p. 25 in Spec)</span>
<a name="line-223"></a><span class='comment'>--</span>
<a name="line-224"></a><span class='comment'>-- * 1.parameter idNodeList : list of all XTag nodes with ID attributes</span>
<a name="line-225"></a><span class='comment'>--</span>
<a name="line-226"></a><span class='comment'>-- - 2.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-227"></a><span class='comment'>--</span>
<a name="line-228"></a><span class='comment'>-- - returns : a list of errors</span>
<a name="line-229"></a>
<a name="line-230"></a><a name="checkForUniqueIds"></a><span class='definition'>checkForUniqueIds</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'>XmlTrees</span>
<a name="line-231"></a><span class='definition'>checkForUniqueIds</span> <span class='varid'>idNodeList</span> <span class='varid'>dtdPart</span>
<a name="line-232"></a> <span class='keyglyph'>=</span> <span class='varid'>checkForUniqueId</span> <span class='varid'>idNodeList</span> <span class='conid'>[]</span>
<a name="line-233"></a> <span class='keyword'>where</span>
<a name="line-234"></a> <span class='varid'>idAttrTypes</span> <span class='keyglyph'>=</span> <span class='varid'>isIdAttrType</span> <span class='varop'>$$</span> <span class='varid'>dtdPart</span>
<a name="line-235"></a>
<a name="line-236"></a> <span class='varid'>checkForUniqueId</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</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-237"></a> <span class='varid'>checkForUniqueId</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'>XTag</span> <span class='varid'>name</span> <span class='keyword'>_</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'>used</span>
<a name="line-238"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>attrValue</span> <span class='varop'>`elem`</span> <span class='varid'>used</span>
<a name="line-239"></a> <span class='keyword'>then</span> <span class='varid'>err</span> <span class='layout'>(</span><span class='str'>"Attribute value "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>attrValue</span> <span class='varop'>++</span> <span class='str'>" of type ID for element "</span> <span class='varop'>++</span>
<a name="line-240"></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'>" must be unique within the document."</span><span class='layout'>)</span> <span class='varid'>x</span>
<a name="line-241"></a> <span class='varop'>++</span>
<a name="line-242"></a> <span class='varid'>checkForUniqueId</span> <span class='varid'>xs</span> <span class='varid'>used</span>
<a name="line-243"></a>
<a name="line-244"></a> <span class='keyword'>else</span> <span class='varid'>checkForUniqueId</span> <span class='varid'>xs</span> <span class='layout'>(</span><span class='varid'>attrValue</span> <span class='conop'>:</span> <span class='varid'>used</span><span class='layout'>)</span>
<a name="line-245"></a> <span class='keyword'>where</span>
<a name="line-246"></a> <span class='varid'>attrValue</span> <span class='keyglyph'>=</span> <span class='varid'>getIdValue</span> <span class='layout'>(</span><span class='varid'>isAttlistOfElement</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='varid'>idAttrTypes</span><span class='layout'>)</span> <span class='varid'>x</span>
<a name="line-247"></a>
<a name="line-248"></a> <span class='varid'>checkForUniqueId</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>[]</span>
<a name="line-249"></a>
<a name="line-250"></a>
<a name="line-251"></a>
<a name="line-252"></a><span class='comment'>-- |</span>
<a name="line-253"></a><span class='comment'>-- Validate that all IDREF\/IDREFS values match the value of some ID attribute.</span>
<a name="line-254"></a><span class='comment'>-- Validity constraint: IDREF (3.3.1 \/ p.26 in Spec)</span>
<a name="line-255"></a><span class='comment'>--</span>
<a name="line-256"></a><span class='comment'>-- * 1.parameter idRefEnv : lookup-table which maps element names to their validation function</span>
<a name="line-257"></a><span class='comment'>--</span>
<a name="line-258"></a><span class='comment'>-- - 2.parameter doc : the document to validate</span>
<a name="line-259"></a><span class='comment'>--</span>
<a name="line-260"></a><span class='comment'>-- - returns : a list of errors</span>
<a name="line-261"></a>
<a name="line-262"></a><a name="checkIdReferences"></a><span class='definition'>checkIdReferences</span> <span class='keyglyph'>::</span> <span class='conid'>IdEnvTable</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTrees</span>
<a name="line-263"></a><span class='definition'>checkIdReferences</span> <span class='varid'>idRefEnv</span> <span class='varid'>doc</span>
<a name="line-264"></a> <span class='keyglyph'>=</span> <span class='varid'>traverseTree</span> <span class='varid'>idRefEnv</span> <span class='varid'>doc</span>
<a name="line-265"></a>
<a name="line-266"></a>
<a name="line-267"></a>
<a name="line-268"></a>
<a name="line-269"></a>
</pre></body>
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