hxt-8.0.0: doc/hdoc/src/Text-XML-HXT-DTDValidation-DTDValidation.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 the DTD of XML documents
<a name="line-13"></a> represented as 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>
<a name="line-19"></a> Unlike validation of the document, the DTD branch is traversed four times:
<a name="line-20"></a>
<a name="line-21"></a> - Validation of Notations
<a name="line-22"></a>
<a name="line-23"></a> - Validation of Unparsed Entities
<a name="line-24"></a>
<a name="line-25"></a> - Validation of Element declarations
<a name="line-26"></a>
<a name="line-27"></a> - Validation of Attribute declarations
<a name="line-28"></a>
<a name="line-29"></a>-}</span>
<a name="line-30"></a>
<a name="line-31"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-32"></a>
<a name="line-33"></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'>DTDValidation</span>
<a name="line-34"></a> <span class='layout'>(</span> <span class='varid'>removeDoublicateDefs</span>
<a name="line-35"></a> <span class='layout'>,</span> <span class='varid'>validateDTD</span>
<a name="line-36"></a> <span class='layout'>)</span>
<a name="line-37"></a><span class='keyword'>where</span>
<a name="line-38"></a>
<a name="line-39"></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-40"></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-41"></a>
<a name="line-42"></a><span class='comment'>-- |</span>
<a name="line-43"></a><span class='comment'>-- Validate a DTD.</span>
<a name="line-44"></a><span class='comment'>--</span>
<a name="line-45"></a><span class='comment'>-- - returns : a functions which takes the DTD subset of the XmlTree, checks</span>
<a name="line-46"></a><span class='comment'>-- if the DTD is valid and returns a list of errors</span>
<a name="line-47"></a>
<a name="line-48"></a><a name="validateDTD"></a><span class='definition'>validateDTD</span> <span class='keyglyph'>::</span> <span class='conid'>XmlArrow</span>
<a name="line-49"></a><span class='definition'>validateDTD</span> <span class='comment'>-- dtdPart</span>
<a name="line-50"></a> <span class='keyglyph'>=</span> <span class='varid'>isDTDDoctype</span>
<a name="line-51"></a> <span class='varop'>`guards`</span>
<a name="line-52"></a> <span class='layout'>(</span> <span class='varid'>listA</span> <span class='varid'>getChildren</span>
<a name="line-53"></a> <span class='varop'>>>></span>
<a name="line-54"></a> <span class='layout'>(</span> <span class='varid'>validateParts</span> <span class='varop'>$<<</span> <span class='layout'>(</span><span class='varid'>getNotationNames</span> <span class='varop'>&&&</span> <span class='varid'>getElemNames</span><span class='layout'>)</span> <span class='layout'>)</span>
<a name="line-55"></a> <span class='layout'>)</span>
<a name="line-56"></a> <span class='keyword'>where</span>
<a name="line-57"></a> <span class='varid'>validateParts</span> <span class='varid'>notationNames</span> <span class='varid'>elemNames</span>
<a name="line-58"></a> <span class='keyglyph'>=</span> <span class='varid'>validateNotations</span>
<a name="line-59"></a> <span class='varop'><+></span>
<a name="line-60"></a> <span class='varid'>validateEntities</span> <span class='varid'>notationNames</span>
<a name="line-61"></a> <span class='varop'><+></span>
<a name="line-62"></a> <span class='varid'>validateElements</span> <span class='varid'>elemNames</span>
<a name="line-63"></a> <span class='varop'><+></span>
<a name="line-64"></a> <span class='varid'>validateAttributes</span> <span class='varid'>elemNames</span> <span class='varid'>notationNames</span>
<a name="line-65"></a>
<a name="line-66"></a> <span class='varid'>getNotationNames</span> <span class='keyglyph'>::</span> <span class='conid'>LA</span> <span class='keyglyph'>[</span><span class='conid'>XmlTree</span><span class='keyglyph'>]</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span>
<a name="line-67"></a> <span class='varid'>getNotationNames</span> <span class='keyglyph'>=</span> <span class='varid'>listA</span> <span class='varop'>$</span> <span class='varid'>unlistA</span> <span class='varop'>>>></span> <span class='varid'>isDTDNotation</span> <span class='varop'>>>></span> <span class='varid'>getDTDAttrValue</span> <span class='varid'>a_name</span>
<a name="line-68"></a>
<a name="line-69"></a> <span class='varid'>getElemNames</span> <span class='keyglyph'>::</span> <span class='conid'>LA</span> <span class='keyglyph'>[</span><span class='conid'>XmlTree</span><span class='keyglyph'>]</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span>
<a name="line-70"></a> <span class='varid'>getElemNames</span> <span class='keyglyph'>=</span> <span class='varid'>listA</span> <span class='varop'>$</span> <span class='varid'>unlistA</span> <span class='varop'>>>></span> <span class='varid'>isDTDElement</span> <span class='varop'>>>></span> <span class='varid'>getDTDAttrValue</span> <span class='varid'>a_name</span>
<a name="line-71"></a>
<a name="line-72"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-73"></a>
<a name="line-74"></a><a name="checkName"></a><span class='definition'>checkName</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>SLA</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>SLA</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-75"></a><span class='definition'>checkName</span> <span class='varid'>name</span> <span class='varid'>msg</span>
<a name="line-76"></a> <span class='keyglyph'>=</span> <span class='varid'>ifA</span> <span class='layout'>(</span> <span class='varid'>getState</span>
<a name="line-77"></a> <span class='varop'>>>></span>
<a name="line-78"></a> <span class='varid'>isA</span> <span class='layout'>(</span><span class='varid'>name</span> <span class='varop'>`elem`</span><span class='layout'>)</span>
<a name="line-79"></a> <span class='layout'>)</span>
<a name="line-80"></a> <span class='varid'>msg</span>
<a name="line-81"></a> <span class='layout'>(</span><span class='varid'>nextState</span> <span class='layout'>(</span><span class='varid'>name</span><span class='conop'>:</span><span class='layout'>)</span> <span class='varop'>>>></span> <span class='varid'>none</span><span class='layout'>)</span>
<a name="line-82"></a>
<a name="line-83"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-84"></a>
<a name="line-85"></a><span class='comment'>-- |</span>
<a name="line-86"></a><span class='comment'>-- Validation of Notations, checks if all notation names are unique.</span>
<a name="line-87"></a><span class='comment'>-- Validity constraint: Unique Notation Name (4.7 \/ p.44 in Spec)</span>
<a name="line-88"></a><span class='comment'>--</span>
<a name="line-89"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-90"></a><span class='comment'>--</span>
<a name="line-91"></a><span class='comment'>-- - returns : a list of errors</span>
<a name="line-92"></a>
<a name="line-93"></a><a name="validateNotations"></a><span class='definition'>validateNotations</span> <span class='keyglyph'>::</span> <span class='conid'>LA</span> <span class='conid'>XmlTrees</span> <span class='conid'>XmlTree</span>
<a name="line-94"></a><span class='definition'>validateNotations</span>
<a name="line-95"></a> <span class='keyglyph'>=</span> <span class='varid'>fromSLA</span> <span class='conid'>[]</span> <span class='layout'>(</span> <span class='varid'>unlistA</span>
<a name="line-96"></a> <span class='varop'>>>></span>
<a name="line-97"></a> <span class='varid'>isDTDNotation</span>
<a name="line-98"></a> <span class='varop'>>>></span>
<a name="line-99"></a> <span class='layout'>(</span><span class='varid'>checkForUniqueNotation</span> <span class='varop'>$<</span> <span class='varid'>getDTDAttrl</span><span class='layout'>)</span>
<a name="line-100"></a> <span class='layout'>)</span>
<a name="line-101"></a> <span class='keyword'>where</span>
<a name="line-102"></a> <span class='varid'>checkForUniqueNotation</span> <span class='keyglyph'>::</span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>SLA</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-103"></a> <span class='varid'>checkForUniqueNotation</span> <span class='varid'>al</span>
<a name="line-104"></a> <span class='keyglyph'>=</span> <span class='varid'>checkName</span> <span class='varid'>name</span> <span class='varop'>$</span>
<a name="line-105"></a> <span class='varid'>err</span> <span class='layout'>(</span> <span class='str'>"Notation "</span><span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>name</span> <span class='varop'>++</span> <span class='str'>" was already specified."</span> <span class='layout'>)</span>
<a name="line-106"></a> <span class='keyword'>where</span>
<a name="line-107"></a> <span class='varid'>name</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al</span>
<a name="line-108"></a>
<a name="line-109"></a><span class='comment'>-- |</span>
<a name="line-110"></a><span class='comment'>-- Validation of Entities.</span>
<a name="line-111"></a><span class='comment'>--</span>
<a name="line-112"></a><span class='comment'>-- 1. Issues a warning if entities are declared multiple times.</span>
<a name="line-113"></a><span class='comment'>--</span>
<a name="line-114"></a><span class='comment'>-- Optional warning: (4.2 \/ p.35 in Spec) </span>
<a name="line-115"></a><span class='comment'>--</span>
<a name="line-116"></a><span class='comment'>--</span>
<a name="line-117"></a><span class='comment'>-- 2. Validates that a notation is declared for an unparsed entity.</span>
<a name="line-118"></a><span class='comment'>--</span>
<a name="line-119"></a><span class='comment'>-- Validity constraint: Notation Declared (4.2.2 \/ p.36 in Spec)</span>
<a name="line-120"></a><span class='comment'>--</span>
<a name="line-121"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-122"></a><span class='comment'>--</span>
<a name="line-123"></a><span class='comment'>-- - 2.parameter notationNames : list of all notation names declared in the DTD</span>
<a name="line-124"></a><span class='comment'>--</span>
<a name="line-125"></a><span class='comment'>-- - returns : a list of errors</span>
<a name="line-126"></a>
<a name="line-127"></a><a name="validateEntities"></a><span class='definition'>validateEntities</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'>LA</span> <span class='conid'>XmlTrees</span> <span class='conid'>XmlTree</span>
<a name="line-128"></a><span class='definition'>validateEntities</span> <span class='varid'>notationNames</span>
<a name="line-129"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span> <span class='varid'>fromSLA</span> <span class='conid'>[]</span> <span class='layout'>(</span> <span class='varid'>unlistA</span>
<a name="line-130"></a> <span class='varop'>>>></span>
<a name="line-131"></a> <span class='varid'>isDTDEntity</span>
<a name="line-132"></a> <span class='varop'>>>></span>
<a name="line-133"></a> <span class='layout'>(</span><span class='varid'>checkForUniqueEntity</span> <span class='varop'>$<</span> <span class='varid'>getDTDAttrl</span><span class='layout'>)</span>
<a name="line-134"></a> <span class='layout'>)</span>
<a name="line-135"></a> <span class='layout'>)</span>
<a name="line-136"></a> <span class='varop'><+></span>
<a name="line-137"></a> <span class='layout'>(</span> <span class='varid'>unlistA</span>
<a name="line-138"></a> <span class='varop'>>>></span>
<a name="line-139"></a> <span class='varid'>isUnparsedEntity</span>
<a name="line-140"></a> <span class='varop'>>>></span>
<a name="line-141"></a> <span class='layout'>(</span><span class='varid'>checkNotationDecl</span> <span class='varop'>$<</span> <span class='varid'>getDTDAttrl</span><span class='layout'>)</span>
<a name="line-142"></a> <span class='layout'>)</span>
<a name="line-143"></a> <span class='keyword'>where</span>
<a name="line-144"></a>
<a name="line-145"></a> <span class='comment'>-- Check if entities are declared multiple times</span>
<a name="line-146"></a>
<a name="line-147"></a> <span class='varid'>checkForUniqueEntity</span> <span class='keyglyph'>::</span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>SLA</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-148"></a> <span class='varid'>checkForUniqueEntity</span> <span class='varid'>al</span>
<a name="line-149"></a> <span class='keyglyph'>=</span> <span class='varid'>checkName</span> <span class='varid'>name</span> <span class='varop'>$</span>
<a name="line-150"></a> <span class='varid'>warn</span> <span class='layout'>(</span> <span class='str'>"Entity "</span><span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>name</span> <span class='varop'>++</span> <span class='str'>" was already specified. "</span> <span class='varop'>++</span>
<a name="line-151"></a> <span class='str'>"First declaration will be used."</span> <span class='layout'>)</span>
<a name="line-152"></a> <span class='keyword'>where</span>
<a name="line-153"></a> <span class='varid'>name</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al</span>
<a name="line-154"></a>
<a name="line-155"></a> <span class='comment'>-- Find unparsed entities for which no notation is specified</span>
<a name="line-156"></a>
<a name="line-157"></a> <span class='varid'>checkNotationDecl</span> <span class='keyglyph'>::</span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-158"></a> <span class='varid'>checkNotationDecl</span> <span class='varid'>al</span>
<a name="line-159"></a> <span class='keyglyph'>|</span> <span class='varid'>notationName</span> <span class='varop'>`elem`</span> <span class='varid'>notationNames</span>
<a name="line-160"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-161"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-162"></a> <span class='keyglyph'>=</span> <span class='varid'>err</span> <span class='layout'>(</span> <span class='str'>"The notation "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>notationName</span> <span class='varop'>++</span> <span class='str'>" must be declared "</span> <span class='varop'>++</span>
<a name="line-163"></a> <span class='str'>"when referenced in the unparsed entity declaration for "</span> <span class='varop'>++</span>
<a name="line-164"></a> <span class='varid'>show</span> <span class='varid'>upEntityName</span> <span class='varop'>++</span> <span class='str'>"."</span>
<a name="line-165"></a> <span class='layout'>)</span>
<a name="line-166"></a> <span class='keyword'>where</span>
<a name="line-167"></a> <span class='varid'>notationName</span> <span class='keyglyph'>=</span> <span class='varid'>lookup1</span> <span class='varid'>k_ndata</span> <span class='varid'>al</span>
<a name="line-168"></a> <span class='varid'>upEntityName</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al</span>
<a name="line-169"></a>
<a name="line-170"></a><span class='comment'>-- |</span>
<a name="line-171"></a><span class='comment'>-- Validation of Element declarations.</span>
<a name="line-172"></a><span class='comment'>--</span>
<a name="line-173"></a><span class='comment'>-- 1. Validates that an element is not declared multiple times.</span>
<a name="line-174"></a><span class='comment'>--</span>
<a name="line-175"></a><span class='comment'>-- Validity constraint: Unique Element Type Declaration (3.2 \/ p.21 in Spec) </span>
<a name="line-176"></a><span class='comment'>--</span>
<a name="line-177"></a><span class='comment'>--</span>
<a name="line-178"></a><span class='comment'>-- 2. Validates that an element name only appears once in a mixed-content declaration.</span>
<a name="line-179"></a><span class='comment'>--</span>
<a name="line-180"></a><span class='comment'>-- Validity constraint: No Duplicate Types (3.2 \/ p.21 in Spec) </span>
<a name="line-181"></a><span class='comment'>--</span>
<a name="line-182"></a><span class='comment'>--</span>
<a name="line-183"></a><span class='comment'>-- 3. Issues a warning if an element mentioned in a content model is not declared in the</span>
<a name="line-184"></a><span class='comment'>-- DTD.</span>
<a name="line-185"></a><span class='comment'>--</span>
<a name="line-186"></a><span class='comment'>-- Optional warning: (3.2 \/ p.21 in Spec)</span>
<a name="line-187"></a><span class='comment'>--</span>
<a name="line-188"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-189"></a><span class='comment'>--</span>
<a name="line-190"></a><span class='comment'>-- - 2.parameter elemNames : list of all element names declared in the DTD</span>
<a name="line-191"></a><span class='comment'>--</span>
<a name="line-192"></a><span class='comment'>-- - returns : a list of errors</span>
<a name="line-193"></a>
<a name="line-194"></a>
<a name="line-195"></a><a name="validateElements"></a><span class='definition'>validateElements</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'>LA</span> <span class='conid'>XmlTrees</span> <span class='conid'>XmlTree</span>
<a name="line-196"></a><span class='definition'>validateElements</span> <span class='varid'>elemNames</span> <span class='comment'>-- dtdPart</span>
<a name="line-197"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span> <span class='varid'>fromSLA</span> <span class='conid'>[]</span> <span class='layout'>(</span> <span class='varid'>unlistA</span>
<a name="line-198"></a> <span class='varop'>>>></span>
<a name="line-199"></a> <span class='varid'>isDTDElement</span>
<a name="line-200"></a> <span class='varop'>>>></span>
<a name="line-201"></a> <span class='layout'>(</span><span class='varid'>checkForUniqueElement</span> <span class='varop'>$<</span> <span class='varid'>getDTDAttrl</span><span class='layout'>)</span>
<a name="line-202"></a> <span class='layout'>)</span>
<a name="line-203"></a> <span class='layout'>)</span>
<a name="line-204"></a> <span class='varop'><+></span>
<a name="line-205"></a> <span class='layout'>(</span> <span class='varid'>unlistA</span>
<a name="line-206"></a> <span class='varop'>>>></span>
<a name="line-207"></a> <span class='varid'>isMixedContentElement</span>
<a name="line-208"></a> <span class='varop'>>>></span>
<a name="line-209"></a> <span class='layout'>(</span><span class='varid'>checkMixedContent</span> <span class='varop'>$<</span> <span class='varid'>getDTDAttrl</span><span class='layout'>)</span>
<a name="line-210"></a> <span class='layout'>)</span>
<a name="line-211"></a> <span class='varop'><+></span>
<a name="line-212"></a> <span class='layout'>(</span> <span class='varid'>unlistA</span>
<a name="line-213"></a> <span class='varop'>>>></span>
<a name="line-214"></a> <span class='varid'>isDTDElement</span>
<a name="line-215"></a> <span class='varop'>>>></span>
<a name="line-216"></a> <span class='layout'>(</span><span class='varid'>checkContentModel</span> <span class='varid'>elemNames</span> <span class='varop'>$<</span> <span class='varid'>getDTDAttrl</span><span class='layout'>)</span>
<a name="line-217"></a> <span class='layout'>)</span>
<a name="line-218"></a> <span class='keyword'>where</span>
<a name="line-219"></a>
<a name="line-220"></a> <span class='comment'>-- Validates that an element is not declared multiple times</span>
<a name="line-221"></a>
<a name="line-222"></a> <span class='varid'>checkForUniqueElement</span> <span class='keyglyph'>::</span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>SLA</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-223"></a> <span class='varid'>checkForUniqueElement</span> <span class='varid'>al</span>
<a name="line-224"></a> <span class='keyglyph'>=</span> <span class='varid'>checkName</span> <span class='varid'>name</span> <span class='varop'>$</span>
<a name="line-225"></a> <span class='varid'>err</span> <span class='layout'>(</span> <span class='str'>"Element type "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>name</span> <span class='varop'>++</span>
<a name="line-226"></a> <span class='str'>" must not be declared more than once."</span> <span class='layout'>)</span>
<a name="line-227"></a> <span class='keyword'>where</span>
<a name="line-228"></a> <span class='varid'>name</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al</span>
<a name="line-229"></a>
<a name="line-230"></a> <span class='comment'>-- Validates that an element name only appears once in a mixed-content declaration</span>
<a name="line-231"></a>
<a name="line-232"></a> <span class='varid'>checkMixedContent</span> <span class='keyglyph'>::</span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-233"></a> <span class='varid'>checkMixedContent</span> <span class='varid'>al</span>
<a name="line-234"></a> <span class='keyglyph'>=</span> <span class='varid'>fromSLA</span> <span class='conid'>[]</span> <span class='layout'>(</span> <span class='varid'>getChildren</span>
<a name="line-235"></a> <span class='varop'>>>></span>
<a name="line-236"></a> <span class='varid'>getChildren</span>
<a name="line-237"></a> <span class='varop'>>>></span>
<a name="line-238"></a> <span class='varid'>isDTDName</span>
<a name="line-239"></a> <span class='varop'>>>></span>
<a name="line-240"></a> <span class='layout'>(</span><span class='varid'>check</span> <span class='varop'>$<</span> <span class='varid'>getDTDAttrl</span><span class='layout'>)</span>
<a name="line-241"></a> <span class='layout'>)</span>
<a name="line-242"></a> <span class='keyword'>where</span>
<a name="line-243"></a> <span class='varid'>elemName</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al</span>
<a name="line-244"></a> <span class='varid'>check</span> <span class='varid'>al'</span>
<a name="line-245"></a> <span class='keyglyph'>=</span> <span class='varid'>checkName</span> <span class='varid'>name</span> <span class='varop'>$</span>
<a name="line-246"></a> <span class='varid'>err</span> <span class='layout'>(</span> <span class='str'>"The element type "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>name</span> <span class='varop'>++</span>
<a name="line-247"></a> <span class='str'>" was already specified in the mixed-content model of the element declaration "</span> <span class='varop'>++</span>
<a name="line-248"></a> <span class='varid'>show</span> <span class='varid'>elemName</span> <span class='varop'>++</span> <span class='str'>"."</span> <span class='layout'>)</span>
<a name="line-249"></a> <span class='keyword'>where</span>
<a name="line-250"></a> <span class='varid'>name</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al'</span>
<a name="line-251"></a>
<a name="line-252"></a> <span class='comment'>-- Issues a warning if an element mentioned in a content model is not</span>
<a name="line-253"></a> <span class='comment'>-- declared in the DTD.</span>
<a name="line-254"></a> <span class='varid'>checkContentModel</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'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-255"></a> <span class='varid'>checkContentModel</span> <span class='varid'>names</span> <span class='varid'>al</span>
<a name="line-256"></a> <span class='keyglyph'>|</span> <span class='varid'>cm</span> <span class='varop'>`elem`</span> <span class='keyglyph'>[</span><span class='varid'>v_children</span><span class='layout'>,</span> <span class='varid'>v_mixed</span><span class='keyglyph'>]</span>
<a name="line-257"></a> <span class='keyglyph'>=</span> <span class='varid'>getChildren</span> <span class='varop'>>>></span> <span class='varid'>checkContent</span>
<a name="line-258"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-259"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-260"></a> <span class='keyword'>where</span>
<a name="line-261"></a> <span class='varid'>elemName</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al</span>
<a name="line-262"></a> <span class='varid'>cm</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_type</span> <span class='varid'>al</span>
<a name="line-263"></a>
<a name="line-264"></a> <span class='varid'>checkContent</span> <span class='keyglyph'>::</span> <span class='conid'>XmlArrow</span>
<a name="line-265"></a> <span class='varid'>checkContent</span>
<a name="line-266"></a> <span class='keyglyph'>=</span> <span class='varid'>choiceA</span>
<a name="line-267"></a> <span class='keyglyph'>[</span> <span class='varid'>isDTDName</span> <span class='conop'>:-></span> <span class='layout'>(</span> <span class='varid'>checkName'</span> <span class='varop'>$<</span> <span class='varid'>getDTDAttrl</span> <span class='layout'>)</span>
<a name="line-268"></a> <span class='layout'>,</span> <span class='varid'>isDTDContent</span> <span class='conop'>:-></span> <span class='layout'>(</span> <span class='varid'>getChildren</span> <span class='varop'>>>></span> <span class='varid'>checkContent</span> <span class='layout'>)</span>
<a name="line-269"></a> <span class='layout'>,</span> <span class='varid'>this</span> <span class='conop'>:-></span> <span class='varid'>none</span>
<a name="line-270"></a> <span class='keyglyph'>]</span>
<a name="line-271"></a> <span class='keyword'>where</span>
<a name="line-272"></a> <span class='varid'>checkName'</span> <span class='varid'>al'</span>
<a name="line-273"></a> <span class='keyglyph'>|</span> <span class='varid'>childElemName</span> <span class='varop'>`elem`</span> <span class='varid'>names</span>
<a name="line-274"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-275"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-276"></a> <span class='keyglyph'>=</span> <span class='varid'>warn</span> <span class='layout'>(</span> <span class='str'>"The element type "</span><span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>childElemName</span> <span class='varop'>++</span>
<a name="line-277"></a> <span class='str'>", used in content model of element "</span><span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>elemName</span> <span class='varop'>++</span>
<a name="line-278"></a> <span class='str'>", is not declared."</span>
<a name="line-279"></a> <span class='layout'>)</span>
<a name="line-280"></a> <span class='keyword'>where</span>
<a name="line-281"></a> <span class='varid'>childElemName</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al'</span>
<a name="line-282"></a>
<a name="line-283"></a><span class='comment'>-- |</span>
<a name="line-284"></a><span class='comment'>-- Validation of Attribute declarations.</span>
<a name="line-285"></a><span class='comment'>--</span>
<a name="line-286"></a><span class='comment'>-- (1) Issues a warning if an attribute is declared for an element type not itself</span>
<a name="line-287"></a><span class='comment'>-- decared.</span>
<a name="line-288"></a><span class='comment'>--</span>
<a name="line-289"></a><span class='comment'>-- Optinal warning: (3.3 \/ p. 24 in Spec)</span>
<a name="line-290"></a><span class='comment'>--</span>
<a name="line-291"></a><span class='comment'>--</span>
<a name="line-292"></a><span class='comment'>-- 2. Issues a warning if more than one definition is provided for the same</span>
<a name="line-293"></a><span class='comment'>-- attribute of a given element type. Fist declaration is binding, later</span>
<a name="line-294"></a><span class='comment'>-- definitions are ignored.</span>
<a name="line-295"></a><span class='comment'>--</span>
<a name="line-296"></a><span class='comment'>-- Optional warning: (3.3 \/ p.24 in Spec)</span>
<a name="line-297"></a><span class='comment'>--</span>
<a name="line-298"></a><span class='comment'>--</span>
<a name="line-299"></a><span class='comment'>-- 3. Issues a warning if the same Nmtoken occures more than once in enumerated</span>
<a name="line-300"></a><span class='comment'>-- attribute types of a single element type.</span>
<a name="line-301"></a><span class='comment'>--</span>
<a name="line-302"></a><span class='comment'>-- Optional warning: (3.3.1 \/ p.27 in Spec) </span>
<a name="line-303"></a><span class='comment'>--</span>
<a name="line-304"></a><span class='comment'>--</span>
<a name="line-305"></a><span class='comment'>-- 4. Validates that an element type has not more than one ID attribute defined.</span>
<a name="line-306"></a><span class='comment'>--</span>
<a name="line-307"></a><span class='comment'>-- Validity constraint: One ID per Element Type (3.3.1 \/ p.26 in Spec) </span>
<a name="line-308"></a><span class='comment'>--</span>
<a name="line-309"></a><span class='comment'>--</span>
<a name="line-310"></a><span class='comment'>-- 5. Validates that an element type has not more than one NOTATION attribute defined.</span>
<a name="line-311"></a><span class='comment'>--</span>
<a name="line-312"></a><span class='comment'>-- Validity constraint: One Notation per Element Type (3.3.1 \/ p.27 in Spec) </span>
<a name="line-313"></a><span class='comment'>--</span>
<a name="line-314"></a><span class='comment'>--</span>
<a name="line-315"></a><span class='comment'>-- 6. Validates that an ID attributes has the type #IMPLIED or #REQUIRED.</span>
<a name="line-316"></a><span class='comment'>--</span>
<a name="line-317"></a><span class='comment'>-- Validity constraint: ID Attribute Default (3.3.1 \/ p.26 in Spec) </span>
<a name="line-318"></a><span class='comment'>--</span>
<a name="line-319"></a><span class='comment'>--</span>
<a name="line-320"></a><span class='comment'>-- 7. Validates that all referenced notations are declared.</span>
<a name="line-321"></a><span class='comment'>--</span>
<a name="line-322"></a><span class='comment'>-- Validity constraint: Notation Attributes (3.3.1 \/ p.27 in Spec) </span>
<a name="line-323"></a><span class='comment'>--</span>
<a name="line-324"></a><span class='comment'>--</span>
<a name="line-325"></a><span class='comment'>-- 8. Validates that notations are not declared for EMPTY elements.</span>
<a name="line-326"></a><span class='comment'>--</span>
<a name="line-327"></a><span class='comment'>-- Validity constraint: No Notation on Empty Element (3.3.1 \/p.27 in Spec) </span>
<a name="line-328"></a><span class='comment'>--</span>
<a name="line-329"></a><span class='comment'>--</span>
<a name="line-330"></a><span class='comment'>-- 9. Validates that the default value matches the lexical constraints of it's type.</span>
<a name="line-331"></a><span class='comment'>--</span>
<a name="line-332"></a><span class='comment'>-- Validity constraint: Attribute default legal (3.3.2 \/ p.28 in Spec)</span>
<a name="line-333"></a><span class='comment'>--</span>
<a name="line-334"></a><span class='comment'>--</span>
<a name="line-335"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-336"></a><span class='comment'>--</span>
<a name="line-337"></a><span class='comment'>-- - 2.parameter elemNames : list of all element names declared in the DTD</span>
<a name="line-338"></a><span class='comment'>--</span>
<a name="line-339"></a><span class='comment'>-- - 3.parameter notationNames : list of all notation names declared in the DTD</span>
<a name="line-340"></a><span class='comment'>--</span>
<a name="line-341"></a><span class='comment'>-- - returns : a list of errors</span>
<a name="line-342"></a>
<a name="line-343"></a><a name="validateAttributes"></a><span class='definition'>validateAttributes</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</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'>LA</span> <span class='conid'>XmlTrees</span> <span class='conid'>XmlTree</span>
<a name="line-344"></a><span class='definition'>validateAttributes</span> <span class='varid'>elemNames</span> <span class='varid'>notationNames</span>
<a name="line-345"></a> <span class='keyglyph'>=</span> <span class='comment'>-- 1. Find attributes for which no elements are declared</span>
<a name="line-346"></a> <span class='layout'>(</span> <span class='varid'>runCheck</span> <span class='varid'>this</span> <span class='layout'>(</span><span class='varid'>checkDeclaredElements</span> <span class='varid'>elemNames</span><span class='layout'>)</span> <span class='layout'>)</span>
<a name="line-347"></a> <span class='varop'><+></span>
<a name="line-348"></a> <span class='comment'>-- 2. Find attributes which are declared more than once</span>
<a name="line-349"></a> <span class='layout'>(</span> <span class='varid'>runNameCheck</span> <span class='varid'>this</span> <span class='varid'>checkForUniqueAttributeDeclaration</span> <span class='layout'>)</span>
<a name="line-350"></a> <span class='varop'><+></span>
<a name="line-351"></a> <span class='comment'>-- 3. Find enumerated attribute types which nmtokens are declared more than once</span>
<a name="line-352"></a> <span class='layout'>(</span> <span class='varid'>runCheck</span> <span class='layout'>(</span><span class='varid'>isEnumAttrType</span> <span class='varop'>`orElse`</span> <span class='varid'>isNotationAttrType</span><span class='layout'>)</span> <span class='varid'>checkEnumeratedTypes</span> <span class='layout'>)</span>
<a name="line-353"></a> <span class='varop'><+></span>
<a name="line-354"></a> <span class='comment'>-- 4. Validate that there exists only one ID attribute for an element</span>
<a name="line-355"></a> <span class='layout'>(</span> <span class='varid'>runNameCheck</span> <span class='varid'>isIdAttrType</span> <span class='varid'>checkForUniqueId</span> <span class='layout'>)</span>
<a name="line-356"></a> <span class='varop'><+></span>
<a name="line-357"></a> <span class='comment'>-- 5. Validate that there exists only one NOTATION attribute for an element</span>
<a name="line-358"></a> <span class='layout'>(</span> <span class='varid'>runNameCheck</span> <span class='varid'>isNotationAttrType</span> <span class='varid'>checkForUniqueNotation</span> <span class='layout'>)</span>
<a name="line-359"></a> <span class='varop'><+></span>
<a name="line-360"></a> <span class='comment'>-- 6. Validate that ID attributes have the type #IMPLIED or #REQUIRED</span>
<a name="line-361"></a> <span class='layout'>(</span> <span class='varid'>runCheck</span> <span class='varid'>isIdAttrType</span> <span class='varid'>checkIdKindConstraint</span> <span class='layout'>)</span>
<a name="line-362"></a> <span class='varop'><+></span>
<a name="line-363"></a> <span class='comment'>-- 7. Validate that all referenced notations are declared</span>
<a name="line-364"></a> <span class='layout'>(</span> <span class='varid'>runCheck</span> <span class='varid'>isNotationAttrType</span> <span class='layout'>(</span><span class='varid'>checkNotationDeclaration</span> <span class='varid'>notationNames</span><span class='layout'>)</span> <span class='layout'>)</span>
<a name="line-365"></a> <span class='varop'><+></span>
<a name="line-366"></a> <span class='comment'>-- 8. Validate that notations are not declared for EMPTY elements</span>
<a name="line-367"></a> <span class='layout'>(</span> <span class='varid'>checkNoNotationForEmptyElements</span> <span class='varop'>$<</span> <span class='varid'>listA</span> <span class='layout'>(</span> <span class='varid'>unlistA</span>
<a name="line-368"></a> <span class='varop'>>>></span>
<a name="line-369"></a> <span class='varid'>isEmptyElement</span>
<a name="line-370"></a> <span class='varop'>>>></span>
<a name="line-371"></a> <span class='varid'>getDTDAttrValue</span> <span class='varid'>a_name</span>
<a name="line-372"></a> <span class='layout'>)</span>
<a name="line-373"></a> <span class='layout'>)</span>
<a name="line-374"></a> <span class='varop'><+></span>
<a name="line-375"></a> <span class='comment'>-- 9. Validate that the default value matches the lexical constraints of it's type</span>
<a name="line-376"></a> <span class='layout'>(</span> <span class='varid'>checkDefaultValueTypes</span> <span class='varop'>$<</span> <span class='varid'>this</span> <span class='layout'>)</span>
<a name="line-377"></a>
<a name="line-378"></a> <span class='keyword'>where</span>
<a name="line-379"></a> <span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-380"></a> <span class='comment'>-- control structures</span>
<a name="line-381"></a>
<a name="line-382"></a> <span class='varid'>runCheck</span> <span class='varid'>select</span> <span class='varid'>check</span>
<a name="line-383"></a> <span class='keyglyph'>=</span> <span class='varid'>unlistA</span> <span class='varop'>>>></span> <span class='varid'>isDTDAttlist</span>
<a name="line-384"></a> <span class='varop'>>>></span>
<a name="line-385"></a> <span class='varid'>select</span>
<a name="line-386"></a> <span class='varop'>>>></span>
<a name="line-387"></a> <span class='layout'>(</span><span class='varid'>check</span> <span class='varop'>$<</span> <span class='varid'>getDTDAttrl</span><span class='layout'>)</span>
<a name="line-388"></a>
<a name="line-389"></a> <span class='varid'>runNameCheck</span> <span class='varid'>select</span> <span class='varid'>check</span>
<a name="line-390"></a> <span class='keyglyph'>=</span> <span class='varid'>fromSLA</span> <span class='conid'>[]</span> <span class='varop'>$</span> <span class='varid'>runCheck</span> <span class='varid'>select</span> <span class='varid'>check</span>
<a name="line-391"></a>
<a name="line-392"></a> <span class='comment'>--------------------------------------------------------------------------</span>
<a name="line-393"></a>
<a name="line-394"></a> <span class='comment'>-- 1. Find attributes for which no elements are declared</span>
<a name="line-395"></a>
<a name="line-396"></a> <span class='varid'>checkDeclaredElements</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'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-397"></a> <span class='varid'>checkDeclaredElements</span> <span class='varid'>elemNames'</span> <span class='varid'>al</span>
<a name="line-398"></a> <span class='keyglyph'>|</span> <span class='varid'>en</span> <span class='varop'>`elem`</span> <span class='varid'>elemNames'</span>
<a name="line-399"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-400"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-401"></a> <span class='keyglyph'>=</span> <span class='varid'>warn</span> <span class='layout'>(</span> <span class='str'>"The element type \""</span><span class='varop'>++</span> <span class='varid'>en</span> <span class='varop'>++</span> <span class='str'>"\" used in dclaration "</span><span class='varop'>++</span>
<a name="line-402"></a> <span class='str'>"of attribute \""</span><span class='varop'>++</span> <span class='varid'>an</span> <span class='varop'>++</span><span class='str'>"\" is not declared."</span>
<a name="line-403"></a> <span class='layout'>)</span>
<a name="line-404"></a> <span class='keyword'>where</span>
<a name="line-405"></a> <span class='varid'>en</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al</span>
<a name="line-406"></a> <span class='varid'>an</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_value</span> <span class='varid'>al</span>
<a name="line-407"></a>
<a name="line-408"></a> <span class='comment'>--------------------------------------------------------------------------</span>
<a name="line-409"></a>
<a name="line-410"></a> <span class='comment'>-- 2. Find attributes which are declared more than once</span>
<a name="line-411"></a>
<a name="line-412"></a> <span class='varid'>checkForUniqueAttributeDeclaration</span> <span class='keyglyph'>::</span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>SLA</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-413"></a> <span class='varid'>checkForUniqueAttributeDeclaration</span> <span class='varid'>al</span>
<a name="line-414"></a> <span class='keyglyph'>=</span> <span class='varid'>checkName</span> <span class='varid'>name</span> <span class='varop'>$</span>
<a name="line-415"></a> <span class='varid'>warn</span> <span class='layout'>(</span> <span class='str'>"Attribute \""</span><span class='varop'>++</span> <span class='varid'>aname</span> <span class='varop'>++</span><span class='str'>"\" for element type \""</span><span class='varop'>++</span>
<a name="line-416"></a> <span class='varid'>ename</span> <span class='varop'>++</span><span class='str'>"\" is already declared. First "</span><span class='varop'>++</span>
<a name="line-417"></a> <span class='str'>"declaration will be used."</span> <span class='layout'>)</span>
<a name="line-418"></a> <span class='keyword'>where</span>
<a name="line-419"></a> <span class='varid'>ename</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al</span>
<a name="line-420"></a> <span class='varid'>aname</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_value</span> <span class='varid'>al</span>
<a name="line-421"></a> <span class='varid'>name</span> <span class='keyglyph'>=</span> <span class='varid'>ename</span> <span class='varop'>++</span> <span class='str'>"|"</span> <span class='varop'>++</span> <span class='varid'>aname</span>
<a name="line-422"></a>
<a name="line-423"></a> <span class='comment'>--------------------------------------------------------------------------</span>
<a name="line-424"></a>
<a name="line-425"></a> <span class='comment'>-- 3. Find enumerated attribute types which nmtokens are declared more than once</span>
<a name="line-426"></a>
<a name="line-427"></a> <span class='varid'>checkEnumeratedTypes</span> <span class='keyglyph'>::</span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-428"></a> <span class='varid'>checkEnumeratedTypes</span> <span class='varid'>al</span>
<a name="line-429"></a> <span class='keyglyph'>=</span> <span class='varid'>fromSLA</span> <span class='conid'>[]</span> <span class='layout'>(</span> <span class='varid'>getChildren</span>
<a name="line-430"></a> <span class='varop'>>>></span>
<a name="line-431"></a> <span class='varid'>isDTDName</span>
<a name="line-432"></a> <span class='varop'>>>></span>
<a name="line-433"></a> <span class='layout'>(</span><span class='varid'>checkForUniqueType</span> <span class='varop'>$<</span> <span class='varid'>getDTDAttrl</span><span class='layout'>)</span>
<a name="line-434"></a> <span class='layout'>)</span>
<a name="line-435"></a> <span class='keyword'>where</span>
<a name="line-436"></a> <span class='varid'>checkForUniqueType</span> <span class='keyglyph'>::</span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>SLA</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-437"></a> <span class='varid'>checkForUniqueType</span> <span class='varid'>al'</span>
<a name="line-438"></a> <span class='keyglyph'>=</span> <span class='varid'>checkName</span> <span class='varid'>nmtoken</span> <span class='varop'>$</span>
<a name="line-439"></a> <span class='varid'>warn</span> <span class='layout'>(</span> <span class='str'>"Nmtoken \""</span><span class='varop'>++</span> <span class='varid'>nmtoken</span> <span class='varop'>++</span><span class='str'>"\" should not "</span><span class='varop'>++</span>
<a name="line-440"></a> <span class='str'>"occur more than once in attribute \""</span><span class='varop'>++</span> <span class='varid'>dtd_value</span> <span class='varid'>al</span> <span class='varop'>++</span>
<a name="line-441"></a> <span class='str'>"\" for element \""</span><span class='varop'>++</span> <span class='varid'>dtd_name</span> <span class='varid'>al</span> <span class='varop'>++</span> <span class='str'>"\"."</span> <span class='layout'>)</span>
<a name="line-442"></a> <span class='keyword'>where</span>
<a name="line-443"></a> <span class='varid'>nmtoken</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al'</span>
<a name="line-444"></a>
<a name="line-445"></a> <span class='comment'>--------------------------------------------------------------------------</span>
<a name="line-446"></a>
<a name="line-447"></a> <span class='comment'>-- 4. Validate that there exists only one ID attribute for an element</span>
<a name="line-448"></a>
<a name="line-449"></a> <span class='varid'>checkForUniqueId</span> <span class='keyglyph'>::</span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>SLA</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-450"></a> <span class='varid'>checkForUniqueId</span> <span class='varid'>al</span>
<a name="line-451"></a> <span class='keyglyph'>=</span> <span class='varid'>checkName</span> <span class='varid'>ename</span> <span class='varop'>$</span>
<a name="line-452"></a> <span class='varid'>err</span> <span class='layout'>(</span> <span class='str'>"Element \""</span><span class='varop'>++</span> <span class='varid'>ename</span> <span class='varop'>++</span> <span class='str'>"\" already has attribute of type "</span><span class='varop'>++</span>
<a name="line-453"></a> <span class='str'>"ID, another attribute \""</span><span class='varop'>++</span> <span class='varid'>dtd_value</span> <span class='varid'>al</span> <span class='varop'>++</span> <span class='str'>"\" of type ID is "</span><span class='varop'>++</span>
<a name="line-454"></a> <span class='str'>"not permitted."</span> <span class='layout'>)</span>
<a name="line-455"></a> <span class='keyword'>where</span>
<a name="line-456"></a> <span class='varid'>ename</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al</span>
<a name="line-457"></a>
<a name="line-458"></a> <span class='comment'>--------------------------------------------------------------------------</span>
<a name="line-459"></a>
<a name="line-460"></a> <span class='comment'>-- 5. Validate that there exists only one NOTATION attribute for an element</span>
<a name="line-461"></a>
<a name="line-462"></a> <span class='varid'>checkForUniqueNotation</span> <span class='keyglyph'>::</span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>SLA</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-463"></a> <span class='varid'>checkForUniqueNotation</span> <span class='varid'>al</span>
<a name="line-464"></a> <span class='keyglyph'>=</span> <span class='varid'>checkName</span> <span class='varid'>ename</span> <span class='varop'>$</span>
<a name="line-465"></a> <span class='varid'>err</span> <span class='layout'>(</span> <span class='str'>"Element \""</span><span class='varop'>++</span> <span class='varid'>ename</span> <span class='varop'>++</span> <span class='str'>"\" already has attribute of type "</span><span class='varop'>++</span>
<a name="line-466"></a> <span class='str'>"NOTATION, another attribute \""</span><span class='varop'>++</span> <span class='varid'>dtd_value</span> <span class='varid'>al</span> <span class='varop'>++</span> <span class='str'>"\" of type NOTATION "</span><span class='varop'>++</span>
<a name="line-467"></a> <span class='str'>"is not permitted."</span> <span class='layout'>)</span>
<a name="line-468"></a> <span class='keyword'>where</span>
<a name="line-469"></a> <span class='varid'>ename</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al</span>
<a name="line-470"></a>
<a name="line-471"></a> <span class='comment'>--------------------------------------------------------------------------</span>
<a name="line-472"></a>
<a name="line-473"></a> <span class='comment'>-- 6. Validate that ID attributes have the type #IMPLIED or #REQUIRED</span>
<a name="line-474"></a>
<a name="line-475"></a> <span class='varid'>checkIdKindConstraint</span> <span class='keyglyph'>::</span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-476"></a> <span class='varid'>checkIdKindConstraint</span> <span class='varid'>al</span>
<a name="line-477"></a> <span class='keyglyph'>|</span> <span class='varid'>attKind</span> <span class='varop'>`elem`</span> <span class='keyglyph'>[</span><span class='varid'>k_implied</span><span class='layout'>,</span> <span class='varid'>k_required</span><span class='keyglyph'>]</span>
<a name="line-478"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-479"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-480"></a> <span class='keyglyph'>=</span> <span class='varid'>err</span> <span class='layout'>(</span> <span class='str'>"ID attribute \""</span><span class='varop'>++</span> <span class='varid'>dtd_value</span> <span class='varid'>al</span> <span class='varop'>++</span><span class='str'>"\" must have a declared default "</span><span class='varop'>++</span>
<a name="line-481"></a> <span class='str'>"of \"#IMPLIED\" or \"REQUIRED\""</span><span class='layout'>)</span>
<a name="line-482"></a> <span class='keyword'>where</span>
<a name="line-483"></a> <span class='varid'>attKind</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_kind</span> <span class='varid'>al</span>
<a name="line-484"></a>
<a name="line-485"></a>
<a name="line-486"></a> <span class='comment'>--------------------------------------------------------------------------</span>
<a name="line-487"></a>
<a name="line-488"></a> <span class='comment'>-- 7. Validate that all referenced notations are declared</span>
<a name="line-489"></a>
<a name="line-490"></a> <span class='varid'>checkNotationDeclaration</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'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-491"></a> <span class='varid'>checkNotationDeclaration</span> <span class='varid'>notations</span> <span class='varid'>al</span>
<a name="line-492"></a> <span class='keyglyph'>=</span> <span class='varid'>getChildren</span>
<a name="line-493"></a> <span class='varop'>>>></span>
<a name="line-494"></a> <span class='varid'>isDTDName</span>
<a name="line-495"></a> <span class='varop'>>>></span>
<a name="line-496"></a> <span class='layout'>(</span><span class='varid'>checkNotations</span> <span class='varop'>$<</span> <span class='varid'>getDTDAttrl</span><span class='layout'>)</span>
<a name="line-497"></a> <span class='keyword'>where</span>
<a name="line-498"></a> <span class='varid'>checkNotations</span> <span class='keyglyph'>::</span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-499"></a> <span class='varid'>checkNotations</span> <span class='varid'>al'</span>
<a name="line-500"></a> <span class='keyglyph'>|</span> <span class='varid'>notation</span> <span class='varop'>`elem`</span> <span class='varid'>notations</span>
<a name="line-501"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-502"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-503"></a> <span class='keyglyph'>=</span> <span class='varid'>err</span> <span class='layout'>(</span> <span class='str'>"The notation \""</span><span class='varop'>++</span> <span class='varid'>notation</span> <span class='varop'>++</span><span class='str'>"\" must be declared when "</span><span class='varop'>++</span>
<a name="line-504"></a> <span class='str'>"referenced in the notation type list for attribute \""</span><span class='varop'>++</span> <span class='varid'>dtd_value</span> <span class='varid'>al</span> <span class='varop'>++</span>
<a name="line-505"></a> <span class='str'>"\" of element \""</span><span class='varop'>++</span> <span class='varid'>dtd_name</span> <span class='varid'>al</span> <span class='varop'>++</span><span class='str'>"\"."</span>
<a name="line-506"></a> <span class='layout'>)</span>
<a name="line-507"></a> <span class='keyword'>where</span>
<a name="line-508"></a> <span class='varid'>notation</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al'</span>
<a name="line-509"></a>
<a name="line-510"></a> <span class='comment'>--------------------------------------------------------------------------</span>
<a name="line-511"></a>
<a name="line-512"></a> <span class='comment'>-- 8. Validate that notations are not declared for EMPTY elements</span>
<a name="line-513"></a>
<a name="line-514"></a> <span class='varid'>checkNoNotationForEmptyElements</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'>LA</span> <span class='conid'>XmlTrees</span> <span class='conid'>XmlTree</span>
<a name="line-515"></a> <span class='varid'>checkNoNotationForEmptyElements</span> <span class='varid'>emptyElems</span>
<a name="line-516"></a> <span class='keyglyph'>=</span> <span class='varid'>unlistA</span>
<a name="line-517"></a> <span class='varop'>>>></span>
<a name="line-518"></a> <span class='varid'>isDTDAttlist</span>
<a name="line-519"></a> <span class='varop'>>>></span>
<a name="line-520"></a> <span class='varid'>isNotationAttrType</span>
<a name="line-521"></a> <span class='varop'>>>></span>
<a name="line-522"></a> <span class='layout'>(</span><span class='varid'>checkNoNotationForEmptyElement</span> <span class='varop'>$<</span> <span class='varid'>getDTDAttrl</span><span class='layout'>)</span>
<a name="line-523"></a> <span class='keyword'>where</span>
<a name="line-524"></a> <span class='varid'>checkNoNotationForEmptyElement</span> <span class='keyglyph'>::</span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-525"></a> <span class='varid'>checkNoNotationForEmptyElement</span> <span class='varid'>al</span>
<a name="line-526"></a> <span class='keyglyph'>|</span> <span class='varid'>ename</span> <span class='varop'>`elem`</span> <span class='varid'>emptyElems</span>
<a name="line-527"></a> <span class='keyglyph'>=</span> <span class='varid'>err</span> <span class='layout'>(</span> <span class='str'>"Attribute \""</span><span class='varop'>++</span> <span class='varid'>dtd_value</span> <span class='varid'>al</span> <span class='varop'>++</span><span class='str'>"\" of type NOTATION must not be "</span><span class='varop'>++</span>
<a name="line-528"></a> <span class='str'>"declared on the element \""</span><span class='varop'>++</span> <span class='varid'>ename</span> <span class='varop'>++</span><span class='str'>"\" declared EMPTY."</span>
<a name="line-529"></a> <span class='layout'>)</span>
<a name="line-530"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-531"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-532"></a> <span class='keyword'>where</span>
<a name="line-533"></a> <span class='varid'>ename</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al</span>
<a name="line-534"></a>
<a name="line-535"></a> <span class='comment'>--------------------------------------------------------------------------</span>
<a name="line-536"></a>
<a name="line-537"></a> <span class='comment'>-- 9. Validate that default values meet the lexical constraints of the attribute types</span>
<a name="line-538"></a>
<a name="line-539"></a> <span class='varid'>checkDefaultValueTypes</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>LA</span> <span class='conid'>XmlTrees</span> <span class='conid'>XmlTree</span>
<a name="line-540"></a> <span class='varid'>checkDefaultValueTypes</span> <span class='varid'>dtdPart'</span>
<a name="line-541"></a> <span class='keyglyph'>=</span> <span class='varid'>unlistA</span> <span class='varop'>>>></span> <span class='varid'>isDTDAttlist</span>
<a name="line-542"></a> <span class='varop'>>>></span>
<a name="line-543"></a> <span class='varid'>isDefaultAttrKind</span>
<a name="line-544"></a> <span class='varop'>>>></span>
<a name="line-545"></a> <span class='layout'>(</span><span class='varid'>checkAttributeValue</span> <span class='varid'>dtdPart'</span> <span class='varop'>$<</span> <span class='varid'>this</span><span class='layout'>)</span>
<a name="line-546"></a>
<a name="line-547"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-548"></a>
<a name="line-549"></a><span class='comment'>-- |</span>
<a name="line-550"></a><span class='comment'>-- Removes doublicate declarations from the DTD, which first declaration is</span>
<a name="line-551"></a><span class='comment'>-- binding. This is the case for ATTLIST and ENTITY declarations.</span>
<a name="line-552"></a><span class='comment'>--</span>
<a name="line-553"></a><span class='comment'>-- - returns : A function that replaces the children of DOCTYPE nodes by a list</span>
<a name="line-554"></a><span class='comment'>-- where all multiple declarations are removed.</span>
<a name="line-555"></a>
<a name="line-556"></a><a name="removeDoublicateDefs"></a><span class='definition'>removeDoublicateDefs</span> <span class='keyglyph'>::</span> <span class='conid'>XmlArrow</span>
<a name="line-557"></a><span class='definition'>removeDoublicateDefs</span>
<a name="line-558"></a> <span class='keyglyph'>=</span> <span class='varid'>replaceChildren</span>
<a name="line-559"></a> <span class='layout'>(</span> <span class='varid'>fromSLA</span> <span class='conid'>[]</span> <span class='layout'>(</span> <span class='varid'>getChildren</span>
<a name="line-560"></a> <span class='varop'>>>></span>
<a name="line-561"></a> <span class='varid'>choiceA</span> <span class='keyglyph'>[</span> <span class='varid'>isDTDAttlist</span> <span class='conop'>:-></span> <span class='layout'>(</span><span class='varid'>removeDoubleAttlist</span> <span class='varop'>$<</span> <span class='varid'>getDTDAttrl</span><span class='layout'>)</span>
<a name="line-562"></a> <span class='layout'>,</span> <span class='varid'>isDTDEntity</span> <span class='conop'>:-></span> <span class='layout'>(</span><span class='varid'>removeDoubleEntity</span> <span class='varop'>$<</span> <span class='varid'>getDTDAttrl</span><span class='layout'>)</span>
<a name="line-563"></a> <span class='layout'>,</span> <span class='varid'>this</span> <span class='conop'>:-></span> <span class='varid'>this</span>
<a name="line-564"></a> <span class='keyglyph'>]</span>
<a name="line-565"></a> <span class='layout'>)</span>
<a name="line-566"></a> <span class='layout'>)</span>
<a name="line-567"></a> <span class='varop'>`when`</span>
<a name="line-568"></a> <span class='varid'>isDTDDoctype</span>
<a name="line-569"></a> <span class='keyword'>where</span>
<a name="line-570"></a> <span class='varid'>checkName'</span> <span class='varid'>n'</span>
<a name="line-571"></a> <span class='keyglyph'>=</span> <span class='varid'>ifA</span> <span class='layout'>(</span> <span class='varid'>getState</span>
<a name="line-572"></a> <span class='varop'>>>></span>
<a name="line-573"></a> <span class='varid'>isA</span> <span class='layout'>(</span><span class='varid'>n'</span> <span class='varop'>`elem`</span><span class='layout'>)</span>
<a name="line-574"></a> <span class='layout'>)</span>
<a name="line-575"></a> <span class='varid'>none</span>
<a name="line-576"></a> <span class='layout'>(</span><span class='varid'>this</span> <span class='varop'>>>></span> <span class='varid'>perform</span> <span class='layout'>(</span><span class='varid'>nextState</span> <span class='layout'>(</span><span class='varid'>n'</span><span class='conop'>:</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-577"></a>
<a name="line-578"></a> <span class='varid'>removeDoubleAttlist</span> <span class='keyglyph'>::</span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>SLA</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-579"></a> <span class='varid'>removeDoubleAttlist</span> <span class='varid'>al</span>
<a name="line-580"></a> <span class='keyglyph'>=</span> <span class='varid'>checkName'</span> <span class='varid'>elemAttr</span>
<a name="line-581"></a> <span class='keyword'>where</span>
<a name="line-582"></a> <span class='varid'>elemAttr</span> <span class='keyglyph'>=</span> <span class='varid'>elemName</span> <span class='varop'>++</span> <span class='str'>"|"</span> <span class='varop'>++</span> <span class='varid'>attrName</span>
<a name="line-583"></a> <span class='varid'>attrName</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_value</span> <span class='varid'>al</span>
<a name="line-584"></a> <span class='varid'>elemName</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_name</span> <span class='varid'>al</span>
<a name="line-585"></a>
<a name="line-586"></a> <span class='varid'>removeDoubleEntity</span> <span class='keyglyph'>::</span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>SLA</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-587"></a> <span class='varid'>removeDoubleEntity</span> <span class='varid'>al</span>
<a name="line-588"></a> <span class='keyglyph'>=</span> <span class='varid'>checkName'</span> <span class='layout'>(</span><span class='varid'>dtd_name</span> <span class='varid'>al</span><span class='layout'>)</span>
<a name="line-589"></a>
<a name="line-590"></a><span class='comment'>-- ------------------------------------------------------------</span>
</pre></body>
</html>