hxt-8.3.0: doc/hdoc/src/Text-XML-HXT-Arrow-Namespace.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<!-- Generated by HsColour, http://www.cs.york.ac.uk/fp/darcs/hscolour/ -->
<title>Haskell Code by HsColour</title>
<link type='text/css' rel='stylesheet' href='hscolour.css' />
</head>
<body>
<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.Arrow.Namespace
<a name="line-5"></a> Copyright : Copyright (C) 2005-2008 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> namespace specific arrows
<a name="line-13"></a>
<a name="line-14"></a>-}</span>
<a name="line-15"></a>
<a name="line-16"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-17"></a>
<a name="line-18"></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'>Arrow</span><span class='varop'>.</span><span class='conid'>Namespace</span>
<a name="line-19"></a> <span class='layout'>(</span> <span class='varid'>attachNsEnv</span>
<a name="line-20"></a> <span class='layout'>,</span> <span class='varid'>cleanupNamespaces</span>
<a name="line-21"></a> <span class='layout'>,</span> <span class='varid'>collectNamespaceDecl</span>
<a name="line-22"></a> <span class='layout'>,</span> <span class='varid'>collectPrefixUriPairs</span>
<a name="line-23"></a> <span class='layout'>,</span> <span class='varid'>isNamespaceDeclAttr</span>
<a name="line-24"></a> <span class='layout'>,</span> <span class='varid'>getNamespaceDecl</span>
<a name="line-25"></a> <span class='layout'>,</span> <span class='varid'>processWithNsEnv</span>
<a name="line-26"></a> <span class='layout'>,</span> <span class='varid'>processWithNsEnvWithoutAttrl</span>
<a name="line-27"></a> <span class='layout'>,</span> <span class='varid'>propagateNamespaces</span>
<a name="line-28"></a> <span class='layout'>,</span> <span class='varid'>uniqueNamespaces</span>
<a name="line-29"></a> <span class='layout'>,</span> <span class='varid'>uniqueNamespacesFromDeclAndQNames</span>
<a name="line-30"></a> <span class='layout'>,</span> <span class='varid'>validateNamespaces</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><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span> <span class='comment'>-- arrow classes</span>
<a name="line-35"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ArrowList</span>
<a name="line-36"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ArrowIf</span>
<a name="line-37"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ArrowTree</span>
<a name="line-38"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ListArrow</span>
<a name="line-39"></a>
<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'>DOM</span><span class='varop'>.</span><span class='conid'>Interface</span>
<a name="line-41"></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'>Arrow</span><span class='varop'>.</span><span class='conid'>XmlArrow</span>
<a name="line-42"></a>
<a name="line-43"></a><span class='keyword'>import</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>Maybe</span> <span class='layout'>(</span> <span class='varid'>isNothing</span>
<a name="line-44"></a> <span class='layout'>,</span> <span class='varid'>fromJust</span>
<a name="line-45"></a> <span class='layout'>)</span>
<a name="line-46"></a><span class='keyword'>import</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>List</span> <span class='layout'>(</span> <span class='varid'>nub</span> <span class='layout'>)</span>
<a name="line-47"></a>
<a name="line-48"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-49"></a>
<a name="line-50"></a><span class='comment'>-- | test whether an attribute node contains an XML Namespace declaration</span>
<a name="line-51"></a>
<a name="line-52"></a><a name="isNamespaceDeclAttr"></a><span class='definition'>isNamespaceDeclAttr</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-53"></a><span class='definition'>isNamespaceDeclAttr</span>
<a name="line-54"></a> <span class='keyglyph'>=</span> <span class='varid'>fromLA</span> <span class='varop'>$</span>
<a name="line-55"></a> <span class='layout'>(</span><span class='varid'>getAttrName</span> <span class='varop'>>>></span> <span class='varid'>isA</span> <span class='varid'>isNameSpaceName</span><span class='layout'>)</span> <span class='varop'>`guards`</span> <span class='varid'>this</span>
<a name="line-56"></a>
<a name="line-57"></a><span class='comment'>-- | get the namespace prefix and the namespace URI out of</span>
<a name="line-58"></a><span class='comment'>-- an attribute tree with a namespace declaration (see 'isNamespaceDeclAttr')</span>
<a name="line-59"></a><span class='comment'>-- for all other nodes this arrow fails</span>
<a name="line-60"></a>
<a name="line-61"></a><a name="getNamespaceDecl"></a><span class='definition'>getNamespaceDecl</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='layout'>(</span><span class='conid'>String</span><span class='layout'>,</span> <span class='conid'>String</span><span class='layout'>)</span>
<a name="line-62"></a><span class='definition'>getNamespaceDecl</span>
<a name="line-63"></a> <span class='keyglyph'>=</span> <span class='varid'>fromLA</span> <span class='varop'>$</span>
<a name="line-64"></a> <span class='varid'>isNamespaceDeclAttr</span>
<a name="line-65"></a> <span class='varop'>>>></span>
<a name="line-66"></a> <span class='layout'>(</span> <span class='layout'>(</span> <span class='varid'>getAttrName</span>
<a name="line-67"></a> <span class='varop'>>>></span>
<a name="line-68"></a> <span class='varid'>arr</span> <span class='varid'>getNsPrefix</span>
<a name="line-69"></a> <span class='layout'>)</span>
<a name="line-70"></a> <span class='varop'>&&&</span> <span class='varid'>xshow</span> <span class='varid'>getChildren</span>
<a name="line-71"></a> <span class='layout'>)</span>
<a name="line-72"></a> <span class='keyword'>where</span>
<a name="line-73"></a> <span class='varid'>getNsPrefix</span> <span class='keyglyph'>=</span> <span class='varid'>drop</span> <span class='num'>6</span> <span class='varop'>.</span> <span class='varid'>qualifiedName</span> <span class='comment'>-- drop "xmlns:"</span>
<a name="line-74"></a>
<a name="line-75"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-76"></a>
<a name="line-77"></a><span class='comment'>-- | collect all namespace declarations contained in a document</span>
<a name="line-78"></a><span class='comment'>--</span>
<a name="line-79"></a><span class='comment'>-- apply 'getNamespaceDecl' to a whole XmlTree</span>
<a name="line-80"></a>
<a name="line-81"></a><a name="collectNamespaceDecl"></a><span class='definition'>collectNamespaceDecl</span> <span class='keyglyph'>::</span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='layout'>(</span><span class='conid'>String</span><span class='layout'>,</span> <span class='conid'>String</span><span class='layout'>)</span>
<a name="line-82"></a><span class='definition'>collectNamespaceDecl</span> <span class='keyglyph'>=</span> <span class='varid'>multi</span> <span class='varid'>getAttrl</span> <span class='varop'>>>></span> <span class='varid'>getNamespaceDecl</span>
<a name="line-83"></a>
<a name="line-84"></a><span class='comment'>-- | collect all (namePrefix, namespaceUri) pairs from a tree</span>
<a name="line-85"></a><span class='comment'>--</span>
<a name="line-86"></a><span class='comment'>-- all qualified names are inspected, whether a namespace uri is defined,</span>
<a name="line-87"></a><span class='comment'>-- for these uris the prefix and uri is returned. This arrow is useful for</span>
<a name="line-88"></a><span class='comment'>-- namespace cleanup, e.g. for documents generated with XSLT. It can be used</span>
<a name="line-89"></a><span class='comment'>-- together with 'collectNamespaceDecl' to 'cleanupNamespaces'</span>
<a name="line-90"></a>
<a name="line-91"></a><a name="collectPrefixUriPairs"></a><span class='definition'>collectPrefixUriPairs</span> <span class='keyglyph'>::</span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='layout'>(</span><span class='conid'>String</span><span class='layout'>,</span> <span class='conid'>String</span><span class='layout'>)</span>
<a name="line-92"></a><span class='definition'>collectPrefixUriPairs</span>
<a name="line-93"></a> <span class='keyglyph'>=</span> <span class='varid'>multi</span> <span class='layout'>(</span><span class='varid'>isElem</span> <span class='varop'><+></span> <span class='varid'>getAttrl</span> <span class='varop'><+></span> <span class='varid'>isPi</span><span class='layout'>)</span>
<a name="line-94"></a> <span class='varop'>>>></span>
<a name="line-95"></a> <span class='varid'>getQName</span>
<a name="line-96"></a> <span class='varop'>>>></span>
<a name="line-97"></a> <span class='varid'>arrL</span> <span class='varid'>getPrefixUri</span>
<a name="line-98"></a> <span class='keyword'>where</span>
<a name="line-99"></a> <span class='varid'>getPrefixUri</span> <span class='keyglyph'>::</span> <span class='conid'>QName</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='layout'>(</span><span class='conid'>String</span><span class='layout'>,</span> <span class='conid'>String</span><span class='layout'>)</span><span class='keyglyph'>]</span>
<a name="line-100"></a> <span class='varid'>getPrefixUri</span> <span class='varid'>n</span>
<a name="line-101"></a> <span class='keyglyph'>|</span> <span class='varid'>null</span> <span class='varid'>uri</span> <span class='keyglyph'>=</span> <span class='conid'>[]</span>
<a name="line-102"></a> <span class='keyglyph'>|</span> <span class='varid'>px</span> <span class='varop'>==</span> <span class='varid'>a_xmlns</span>
<a name="line-103"></a> <span class='varop'>||</span>
<a name="line-104"></a> <span class='varid'>px</span> <span class='varop'>==</span> <span class='varid'>a_xml</span> <span class='keyglyph'>=</span> <span class='conid'>[]</span> <span class='comment'>-- these ones are reserved an predefined</span>
<a name="line-105"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='keyglyph'>[</span><span class='layout'>(</span><span class='varid'>namePrefix</span> <span class='varid'>n</span><span class='layout'>,</span> <span class='varid'>uri</span><span class='layout'>)</span><span class='keyglyph'>]</span>
<a name="line-106"></a> <span class='keyword'>where</span>
<a name="line-107"></a> <span class='varid'>uri</span> <span class='keyglyph'>=</span> <span class='varid'>namespaceUri</span> <span class='varid'>n</span>
<a name="line-108"></a> <span class='varid'>px</span> <span class='keyglyph'>=</span> <span class='varid'>namePrefix</span> <span class='varid'>n</span>
<a name="line-109"></a>
<a name="line-110"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-111"></a>
<a name="line-112"></a><span class='comment'>-- | generate unique namespaces and add all namespace declarations to the root element</span>
<a name="line-113"></a><span class='comment'>--</span>
<a name="line-114"></a><span class='comment'>-- Calls 'cleanupNamespaces' with 'collectNamespaceDecl'</span>
<a name="line-115"></a>
<a name="line-116"></a><a name="uniqueNamespaces"></a><span class='definition'>uniqueNamespaces</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-117"></a><span class='definition'>uniqueNamespaces</span>
<a name="line-118"></a> <span class='keyglyph'>=</span> <span class='varid'>fromLA</span> <span class='varop'>$</span>
<a name="line-119"></a> <span class='varid'>cleanupNamespaces</span> <span class='varid'>collectNamespaceDecl</span>
<a name="line-120"></a>
<a name="line-121"></a><span class='comment'>-- | generate unique namespaces and add all namespace declarations for all prefix-uri pairs in all qualified names</span>
<a name="line-122"></a><span class='comment'>--</span>
<a name="line-123"></a><span class='comment'>-- useful for cleanup of namespaces in generated documents.</span>
<a name="line-124"></a><span class='comment'>-- Calls 'cleanupNamespaces' with @ collectNamespaceDecl <+> collectPrefixUriPairs @</span>
<a name="line-125"></a>
<a name="line-126"></a><a name="uniqueNamespacesFromDeclAndQNames"></a><span class='definition'>uniqueNamespacesFromDeclAndQNames</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-127"></a><span class='definition'>uniqueNamespacesFromDeclAndQNames</span>
<a name="line-128"></a> <span class='keyglyph'>=</span> <span class='varid'>fromLA</span> <span class='varop'>$</span>
<a name="line-129"></a> <span class='varid'>cleanupNamespaces</span> <span class='layout'>(</span><span class='varid'>collectNamespaceDecl</span> <span class='varop'><+></span> <span class='varid'>collectPrefixUriPairs</span><span class='layout'>)</span>
<a name="line-130"></a>
<a name="line-131"></a><span class='comment'>-- | does the real work for namespace cleanup.</span>
<a name="line-132"></a><span class='comment'>--</span>
<a name="line-133"></a><span class='comment'>-- The parameter is used for collecting namespace uris and prefixes from the input tree</span>
<a name="line-134"></a>
<a name="line-135"></a><a name="cleanupNamespaces"></a><span class='definition'>cleanupNamespaces</span> <span class='keyglyph'>::</span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='layout'>(</span><span class='conid'>String</span><span class='layout'>,</span> <span class='conid'>String</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-136"></a><span class='definition'>cleanupNamespaces</span> <span class='varid'>collectNamespaces</span>
<a name="line-137"></a> <span class='keyglyph'>=</span> <span class='varid'>renameNamespaces</span> <span class='varop'>$<</span> <span class='layout'>(</span><span class='varid'>listA</span> <span class='varid'>collectNamespaces</span> <span class='varop'>>>^</span> <span class='layout'>(</span><span class='varid'>toNsEnv</span> <span class='varop'>>>></span> <span class='varid'>nub</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-138"></a> <span class='keyword'>where</span>
<a name="line-139"></a> <span class='varid'>renameNamespaces</span> <span class='keyglyph'>::</span> <span class='conid'>NsEnv</span> <span class='keyglyph'>-></span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-140"></a> <span class='varid'>renameNamespaces</span> <span class='varid'>env</span>
<a name="line-141"></a> <span class='keyglyph'>=</span> <span class='varid'>processBottomUp</span>
<a name="line-142"></a> <span class='layout'>(</span> <span class='varid'>processAttrl</span>
<a name="line-143"></a> <span class='layout'>(</span> <span class='layout'>(</span> <span class='varid'>none</span> <span class='varop'>`when`</span> <span class='varid'>isNamespaceDeclAttr</span> <span class='layout'>)</span> <span class='comment'>-- remove all namespace declarations</span>
<a name="line-144"></a> <span class='varop'>>>></span>
<a name="line-145"></a> <span class='varid'>changeQName</span> <span class='varid'>renamePrefix</span> <span class='comment'>-- update namespace prefix of attribute names, if namespace uri is set</span>
<a name="line-146"></a> <span class='layout'>)</span>
<a name="line-147"></a> <span class='varop'>>>></span>
<a name="line-148"></a> <span class='varid'>changeQName</span> <span class='varid'>renamePrefix</span> <span class='comment'>-- update namespace prefix of element names</span>
<a name="line-149"></a> <span class='layout'>)</span>
<a name="line-150"></a> <span class='varop'>>>></span>
<a name="line-151"></a> <span class='varid'>attachEnv</span> <span class='varid'>env1</span> <span class='comment'>-- all all namespaces as attributes to the root node attribute list</span>
<a name="line-152"></a> <span class='keyword'>where</span>
<a name="line-153"></a> <span class='varid'>renamePrefix</span> <span class='keyglyph'>::</span> <span class='conid'>QName</span> <span class='keyglyph'>-></span> <span class='conid'>QName</span>
<a name="line-154"></a> <span class='varid'>renamePrefix</span> <span class='varid'>n</span>
<a name="line-155"></a> <span class='keyglyph'>|</span> <span class='varid'>isNullXName</span> <span class='varid'>uri</span> <span class='keyglyph'>=</span> <span class='varid'>n</span>
<a name="line-156"></a> <span class='keyglyph'>|</span> <span class='varid'>isNothing</span> <span class='varid'>newPx</span> <span class='keyglyph'>=</span> <span class='varid'>n</span>
<a name="line-157"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='varid'>setNamePrefix'</span> <span class='layout'>(</span><span class='varid'>fromJust</span> <span class='varid'>newPx</span><span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-158"></a> <span class='keyword'>where</span>
<a name="line-159"></a> <span class='varid'>uri</span> <span class='keyglyph'>=</span> <span class='varid'>namespaceUri'</span> <span class='varid'>n</span>
<a name="line-160"></a> <span class='varid'>newPx</span> <span class='keyglyph'>=</span> <span class='varid'>lookup</span> <span class='varid'>uri</span> <span class='varid'>revEnv1</span>
<a name="line-161"></a>
<a name="line-162"></a> <span class='varid'>revEnv1</span> <span class='keyglyph'>=</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='layout'>(</span><span class='varid'>x</span><span class='layout'>,</span> <span class='varid'>y</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='layout'>(</span><span class='varid'>y</span><span class='layout'>,</span> <span class='varid'>x</span><span class='layout'>)</span><span class='layout'>)</span> <span class='varid'>env1</span>
<a name="line-163"></a>
<a name="line-164"></a> <span class='varid'>env1</span> <span class='keyglyph'>::</span> <span class='conid'>NsEnv</span>
<a name="line-165"></a> <span class='varid'>env1</span> <span class='keyglyph'>=</span> <span class='varid'>newEnv</span> <span class='conid'>[]</span> <span class='varid'>uris</span>
<a name="line-166"></a>
<a name="line-167"></a> <span class='varid'>uris</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>XName</span><span class='keyglyph'>]</span>
<a name="line-168"></a> <span class='varid'>uris</span> <span class='keyglyph'>=</span> <span class='varid'>nub</span> <span class='varop'>.</span> <span class='varid'>map</span> <span class='varid'>snd</span> <span class='varop'>$</span> <span class='varid'>env</span>
<a name="line-169"></a>
<a name="line-170"></a> <span class='varid'>genPrefixes</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>XName</span><span class='keyglyph'>]</span>
<a name="line-171"></a> <span class='varid'>genPrefixes</span> <span class='keyglyph'>=</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>newXName</span> <span class='varop'>.</span> <span class='layout'>(</span><span class='str'>"ns"</span> <span class='varop'>++</span><span class='layout'>)</span> <span class='varop'>.</span> <span class='varid'>show</span><span class='layout'>)</span> <span class='keyglyph'>[</span><span class='layout'>(</span><span class='num'>0</span><span class='keyglyph'>::</span><span class='conid'>Int</span><span class='layout'>)</span><span class='keyglyph'>..</span><span class='keyglyph'>]</span>
<a name="line-172"></a>
<a name="line-173"></a> <span class='varid'>newEnv</span> <span class='keyglyph'>::</span> <span class='conid'>NsEnv</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>XName</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>NsEnv</span>
<a name="line-174"></a> <span class='varid'>newEnv</span> <span class='varid'>env'</span> <span class='conid'>[]</span>
<a name="line-175"></a> <span class='keyglyph'>=</span> <span class='varid'>env'</span>
<a name="line-176"></a>
<a name="line-177"></a> <span class='varid'>newEnv</span> <span class='varid'>env'</span> <span class='layout'>(</span><span class='varid'>uri</span><span class='conop'>:</span><span class='varid'>rest</span><span class='layout'>)</span>
<a name="line-178"></a> <span class='keyglyph'>=</span> <span class='varid'>newEnv</span> <span class='varid'>env''</span> <span class='varid'>rest</span>
<a name="line-179"></a> <span class='keyword'>where</span>
<a name="line-180"></a> <span class='varid'>env''</span> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='varid'>prefix</span><span class='layout'>,</span> <span class='varid'>uri</span><span class='layout'>)</span> <span class='conop'>:</span> <span class='varid'>env'</span>
<a name="line-181"></a> <span class='varid'>prefix</span>
<a name="line-182"></a> <span class='keyglyph'>=</span> <span class='varid'>head</span> <span class='layout'>(</span><span class='varid'>filter</span> <span class='varid'>notAlreadyUsed</span> <span class='varop'>$</span> <span class='varid'>preferedPrefixes</span> <span class='varop'>++</span> <span class='varid'>genPrefixes</span><span class='layout'>)</span>
<a name="line-183"></a> <span class='varid'>preferedPrefixes</span>
<a name="line-184"></a> <span class='keyglyph'>=</span> <span class='varid'>map</span> <span class='varid'>fst</span> <span class='varop'>.</span> <span class='varid'>filter</span> <span class='layout'>(</span><span class='layout'>(</span><span class='varop'>==</span><span class='varid'>uri</span><span class='layout'>)</span><span class='varop'>.</span><span class='varid'>snd</span><span class='layout'>)</span> <span class='varop'>$</span> <span class='varid'>env</span>
<a name="line-185"></a> <span class='varid'>notAlreadyUsed</span> <span class='varid'>s</span>
<a name="line-186"></a> <span class='keyglyph'>=</span> <span class='varid'>isNothing</span> <span class='varop'>.</span> <span class='varid'>lookup</span> <span class='varid'>s</span> <span class='varop'>$</span> <span class='varid'>env'</span>
<a name="line-187"></a>
<a name="line-188"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-189"></a>
<a name="line-190"></a><span class='comment'>-- | auxiliary arrow for processing with a namespace environment</span>
<a name="line-191"></a><span class='comment'>--</span>
<a name="line-192"></a><span class='comment'>-- process a document tree with an arrow, containing always the</span>
<a name="line-193"></a><span class='comment'>-- valid namespace environment as extra parameter.</span>
<a name="line-194"></a><span class='comment'>-- The namespace environment is implemented as a 'Data.AssocList.AssocList'.</span>
<a name="line-195"></a><span class='comment'>-- Processing of attributes can be controlled by a boolean parameter</span>
<a name="line-196"></a>
<a name="line-197"></a><a name="processWithNsEnv1"></a><span class='definition'>processWithNsEnv1</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='conid'>Bool</span> <span class='keyglyph'>-></span> <span class='layout'>(</span><span class='conid'>NsEnv</span> <span class='keyglyph'>-></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='conid'>NsEnv</span> <span class='keyglyph'>-></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-198"></a><span class='definition'>processWithNsEnv1</span> <span class='varid'>withAttr</span> <span class='varid'>f</span> <span class='varid'>env</span>
<a name="line-199"></a> <span class='keyglyph'>=</span> <span class='varid'>ifA</span> <span class='varid'>isElem</span> <span class='comment'>-- the test is just an optimization</span>
<a name="line-200"></a> <span class='layout'>(</span> <span class='varid'>processWithExtendedEnv</span> <span class='varop'>$<</span> <span class='varid'>arr</span> <span class='layout'>(</span><span class='varid'>extendEnv</span> <span class='varid'>env</span><span class='layout'>)</span> <span class='layout'>)</span> <span class='comment'>-- only element nodes contain namespace declarations</span>
<a name="line-201"></a> <span class='layout'>(</span> <span class='varid'>processWithExtendedEnv</span> <span class='varid'>env</span> <span class='layout'>)</span>
<a name="line-202"></a> <span class='keyword'>where</span>
<a name="line-203"></a> <span class='varid'>processWithExtendedEnv</span> <span class='varid'>env'</span>
<a name="line-204"></a> <span class='keyglyph'>=</span> <span class='varid'>f</span> <span class='varid'>env'</span> <span class='comment'>-- apply the env filter</span>
<a name="line-205"></a> <span class='varop'>>>></span>
<a name="line-206"></a> <span class='layout'>(</span> <span class='layout'>(</span> <span class='keyword'>if</span> <span class='varid'>withAttr</span>
<a name="line-207"></a> <span class='keyword'>then</span> <span class='varid'>processAttrl</span> <span class='layout'>(</span><span class='varid'>f</span> <span class='varid'>env'</span><span class='layout'>)</span> <span class='comment'>-- apply the env to all attributes</span>
<a name="line-208"></a> <span class='keyword'>else</span> <span class='varid'>this</span>
<a name="line-209"></a> <span class='layout'>)</span>
<a name="line-210"></a> <span class='varop'>>>></span>
<a name="line-211"></a> <span class='varid'>processChildren</span> <span class='layout'>(</span><span class='varid'>processWithNsEnv</span> <span class='varid'>f</span> <span class='varid'>env'</span><span class='layout'>)</span> <span class='comment'>-- apply the env recursively to all children</span>
<a name="line-212"></a> <span class='layout'>)</span>
<a name="line-213"></a> <span class='varop'>`when`</span> <span class='varid'>isElem</span> <span class='comment'>-- attrl and children only need processing for elem nodes</span>
<a name="line-214"></a>
<a name="line-215"></a> <span class='varid'>extendEnv</span> <span class='keyglyph'>::</span> <span class='conid'>NsEnv</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>NsEnv</span>
<a name="line-216"></a> <span class='varid'>extendEnv</span> <span class='varid'>env'</span> <span class='varid'>t'</span>
<a name="line-217"></a> <span class='keyglyph'>=</span> <span class='varid'>addEntries</span> <span class='layout'>(</span><span class='varid'>toNsEnv</span> <span class='varid'>newDecls</span><span class='layout'>)</span> <span class='varid'>env'</span>
<a name="line-218"></a> <span class='keyword'>where</span>
<a name="line-219"></a> <span class='varid'>newDecls</span> <span class='keyglyph'>=</span> <span class='varid'>runLA</span> <span class='layout'>(</span> <span class='varid'>getAttrl</span> <span class='varop'>>>></span> <span class='varid'>getNamespaceDecl</span> <span class='layout'>)</span> <span class='varid'>t'</span>
<a name="line-220"></a>
<a name="line-221"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-222"></a>
<a name="line-223"></a><span class='comment'>-- | process a document tree with an arrow, containing always the</span>
<a name="line-224"></a><span class='comment'>-- valid namespace environment as extra parameter.</span>
<a name="line-225"></a><span class='comment'>--</span>
<a name="line-226"></a><span class='comment'>-- The namespace environment is implemented as a 'Data.AssocList.AssocList'</span>
<a name="line-227"></a>
<a name="line-228"></a><a name="processWithNsEnv"></a><span class='definition'>processWithNsEnv</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='layout'>(</span><span class='conid'>NsEnv</span> <span class='keyglyph'>-></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='conid'>NsEnv</span> <span class='keyglyph'>-></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-229"></a><span class='definition'>processWithNsEnv</span> <span class='keyglyph'>=</span> <span class='varid'>processWithNsEnv1</span> <span class='conid'>True</span>
<a name="line-230"></a>
<a name="line-231"></a><span class='comment'>-- | process all element nodes of a document tree with an arrow, containing always the</span>
<a name="line-232"></a><span class='comment'>-- valid namespace environment as extra parameter. Attribute lists are not processed.</span>
<a name="line-233"></a><span class='comment'>--</span>
<a name="line-234"></a><span class='comment'>-- See also: 'processWithNsEnv'</span>
<a name="line-235"></a>
<a name="line-236"></a><a name="processWithNsEnvWithoutAttrl"></a><span class='definition'>processWithNsEnvWithoutAttrl</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='layout'>(</span><span class='conid'>NsEnv</span> <span class='keyglyph'>-></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='conid'>NsEnv</span> <span class='keyglyph'>-></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-237"></a><span class='definition'>processWithNsEnvWithoutAttrl</span> <span class='keyglyph'>=</span> <span class='varid'>processWithNsEnv1</span> <span class='conid'>False</span>
<a name="line-238"></a>
<a name="line-239"></a><span class='comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-240"></a>
<a name="line-241"></a><span class='comment'>-- | attach all valid namespace declarations to the attribute list of element nodes.</span>
<a name="line-242"></a><span class='comment'>--</span>
<a name="line-243"></a><span class='comment'>-- This arrow is useful for document processing, that requires access to all namespace</span>
<a name="line-244"></a><span class='comment'>-- declarations at any element node, but which cannot be done with a simple 'processWithNsEnv'.</span>
<a name="line-245"></a>
<a name="line-246"></a><a name="attachNsEnv"></a><span class='definition'>attachNsEnv</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='conid'>NsEnv</span> <span class='keyglyph'>-></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-247"></a><span class='definition'>attachNsEnv</span> <span class='varid'>initialEnv</span>
<a name="line-248"></a> <span class='keyglyph'>=</span> <span class='varid'>fromLA</span> <span class='varop'>$</span> <span class='varid'>processWithNsEnvWithoutAttrl</span> <span class='varid'>attachEnv</span> <span class='varid'>initialEnv</span>
<a name="line-249"></a> <span class='keyword'>where</span>
<a name="line-250"></a>
<a name="line-251"></a><a name="attachEnv"></a><span class='definition'>attachEnv</span> <span class='keyglyph'>::</span> <span class='conid'>NsEnv</span> <span class='keyglyph'>-></span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-252"></a><span class='definition'>attachEnv</span> <span class='varid'>env</span>
<a name="line-253"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span> <span class='varid'>processAttrl</span> <span class='layout'>(</span><span class='varid'>none</span> <span class='varop'>`when`</span> <span class='varid'>isNamespaceDeclAttr</span><span class='layout'>)</span>
<a name="line-254"></a> <span class='varop'>>>></span>
<a name="line-255"></a> <span class='varid'>addAttrl</span> <span class='layout'>(</span><span class='varid'>catA</span> <span class='varid'>nsAttrl</span><span class='layout'>)</span>
<a name="line-256"></a> <span class='layout'>)</span>
<a name="line-257"></a> <span class='varop'>`when`</span> <span class='varid'>isElem</span>
<a name="line-258"></a> <span class='keyword'>where</span>
<a name="line-259"></a> <span class='varid'>nsAttrl</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span><span class='keyglyph'>]</span>
<a name="line-260"></a> <span class='varid'>nsAttrl</span> <span class='keyglyph'>=</span> <span class='varid'>map</span> <span class='varid'>nsDeclToAttr</span> <span class='varid'>env</span>
<a name="line-261"></a>
<a name="line-262"></a> <span class='varid'>nsDeclToAttr</span> <span class='keyglyph'>::</span> <span class='layout'>(</span><span class='conid'>XName</span><span class='layout'>,</span> <span class='conid'>XName</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-263"></a> <span class='varid'>nsDeclToAttr</span> <span class='layout'>(</span><span class='varid'>n</span><span class='layout'>,</span> <span class='varid'>uri</span><span class='layout'>)</span>
<a name="line-264"></a> <span class='keyglyph'>=</span> <span class='varid'>mkAttr</span> <span class='varid'>qn</span> <span class='layout'>(</span><span class='varid'>txt</span> <span class='layout'>(</span><span class='varid'>show</span> <span class='varid'>uri</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-265"></a> <span class='keyword'>where</span>
<a name="line-266"></a> <span class='varid'>qn</span> <span class='keyglyph'>::</span> <span class='conid'>QName</span>
<a name="line-267"></a> <span class='varid'>qn</span> <span class='keyglyph'>|</span> <span class='varid'>isNullXName</span> <span class='varid'>n</span> <span class='keyglyph'>=</span> <span class='varid'>mkQName'</span> <span class='varid'>nullXName</span> <span class='varid'>xmlnsXName</span> <span class='varid'>xmlnsNamespaceXName</span>
<a name="line-268"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='varid'>mkQName'</span> <span class='varid'>xmlnsXName</span> <span class='varid'>n</span> <span class='varid'>xmlnsNamespaceXName</span>
<a name="line-269"></a>
<a name="line-270"></a><span class='comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-271"></a>
<a name="line-272"></a><span class='comment'>-- |</span>
<a name="line-273"></a><span class='comment'>-- propagate all namespace declarations \"xmlns:ns=...\" to all element and attribute nodes of a document.</span>
<a name="line-274"></a><span class='comment'>--</span>
<a name="line-275"></a><span class='comment'>-- This arrow does not check for illegal use of namespaces.</span>
<a name="line-276"></a><span class='comment'>-- The real work is done by 'propagateNamespaceEnv'.</span>
<a name="line-277"></a><span class='comment'>--</span>
<a name="line-278"></a><span class='comment'>-- The arrow may be applied repeatedly if neccessary.</span>
<a name="line-279"></a>
<a name="line-280"></a><a name="propagateNamespaces"></a><span class='definition'>propagateNamespaces</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-281"></a><span class='definition'>propagateNamespaces</span> <span class='keyglyph'>=</span> <span class='varid'>fromLA</span> <span class='varop'>$</span>
<a name="line-282"></a> <span class='varid'>propagateNamespaceEnv</span> <span class='keyglyph'>[</span> <span class='layout'>(</span><span class='varid'>xmlXName</span><span class='layout'>,</span> <span class='varid'>xmlNamespaceXName</span><span class='layout'>)</span>
<a name="line-283"></a> <span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xmlnsXName</span><span class='layout'>,</span> <span class='varid'>xmlnsNamespaceXName</span><span class='layout'>)</span>
<a name="line-284"></a> <span class='keyglyph'>]</span>
<a name="line-285"></a>
<a name="line-286"></a><span class='comment'>-- |</span>
<a name="line-287"></a><span class='comment'>-- attaches the namespace info given by the namespace table</span>
<a name="line-288"></a><span class='comment'>-- to a tag node and its attributes and children.</span>
<a name="line-289"></a>
<a name="line-290"></a><a name="propagateNamespaceEnv"></a><span class='definition'>propagateNamespaceEnv</span> <span class='keyglyph'>::</span> <span class='conid'>NsEnv</span> <span class='keyglyph'>-></span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-291"></a><span class='definition'>propagateNamespaceEnv</span>
<a name="line-292"></a> <span class='keyglyph'>=</span> <span class='varid'>processWithNsEnv</span> <span class='varid'>addNamespaceUri</span>
<a name="line-293"></a> <span class='keyword'>where</span>
<a name="line-294"></a> <span class='varid'>addNamespaceUri</span> <span class='keyglyph'>::</span> <span class='conid'>NsEnv</span> <span class='keyglyph'>-></span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-295"></a> <span class='varid'>addNamespaceUri</span> <span class='varid'>env'</span>
<a name="line-296"></a> <span class='keyglyph'>=</span> <span class='varid'>choiceA</span> <span class='keyglyph'>[</span> <span class='varid'>isElem</span> <span class='conop'>:-></span> <span class='varid'>changeElemName</span> <span class='layout'>(</span><span class='varid'>setNamespace</span> <span class='varid'>env'</span><span class='layout'>)</span>
<a name="line-297"></a> <span class='layout'>,</span> <span class='varid'>isAttr</span> <span class='conop'>:-></span> <span class='varid'>attachNamespaceUriToAttr</span> <span class='varid'>env'</span>
<a name="line-298"></a> <span class='layout'>,</span> <span class='varid'>isPi</span> <span class='conop'>:-></span> <span class='varid'>changePiName</span> <span class='layout'>(</span><span class='varid'>setNamespace</span> <span class='varid'>env'</span><span class='layout'>)</span>
<a name="line-299"></a> <span class='layout'>,</span> <span class='varid'>this</span> <span class='conop'>:-></span> <span class='varid'>this</span>
<a name="line-300"></a> <span class='keyglyph'>]</span>
<a name="line-301"></a>
<a name="line-302"></a> <span class='varid'>attachNamespaceUriToAttr</span> <span class='keyglyph'>::</span> <span class='conid'>NsEnv</span> <span class='keyglyph'>-></span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-303"></a> <span class='varid'>attachNamespaceUriToAttr</span> <span class='varid'>attrEnv</span>
<a name="line-304"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span> <span class='layout'>(</span> <span class='varid'>getQName</span> <span class='varop'>>>></span> <span class='varid'>isA</span> <span class='layout'>(</span><span class='varid'>not</span> <span class='varop'>.</span> <span class='varid'>null</span> <span class='varop'>.</span> <span class='varid'>namePrefix</span><span class='layout'>)</span> <span class='layout'>)</span>
<a name="line-305"></a> <span class='varop'>`guards`</span>
<a name="line-306"></a> <span class='varid'>changeAttrName</span> <span class='layout'>(</span><span class='varid'>setNamespace</span> <span class='varid'>attrEnv</span><span class='layout'>)</span>
<a name="line-307"></a> <span class='layout'>)</span>
<a name="line-308"></a> <span class='varop'>`orElse`</span>
<a name="line-309"></a> <span class='layout'>(</span> <span class='varid'>changeAttrName</span> <span class='layout'>(</span><span class='varid'>const</span> <span class='varid'>xmlnsQN</span><span class='layout'>)</span>
<a name="line-310"></a> <span class='varop'>`when`</span>
<a name="line-311"></a> <span class='varid'>hasName</span> <span class='varid'>a_xmlns</span>
<a name="line-312"></a> <span class='layout'>)</span>
<a name="line-313"></a>
<a name="line-314"></a><span class='comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-315"></a>
<a name="line-316"></a><span class='comment'>-- |</span>
<a name="line-317"></a><span class='comment'>-- validate the namespace constraints in a whole tree.</span>
<a name="line-318"></a><span class='comment'>--</span>
<a name="line-319"></a><span class='comment'>-- Result is the list of errors concerning namespaces.</span>
<a name="line-320"></a><span class='comment'>-- Predicates 'isWellformedQName', 'isWellformedQualifiedName', 'isDeclaredNamespace'</span>
<a name="line-321"></a><span class='comment'>-- and 'isWellformedNSDecl' are applied to the appropriate elements and attributes.</span>
<a name="line-322"></a>
<a name="line-323"></a><a name="validateNamespaces"></a><span class='definition'>validateNamespaces</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-324"></a><span class='definition'>validateNamespaces</span> <span class='keyglyph'>=</span> <span class='varid'>fromLA</span> <span class='varid'>validateNamespaces1</span>
<a name="line-325"></a>
<a name="line-326"></a><a name="validateNamespaces1"></a><span class='definition'>validateNamespaces1</span> <span class='keyglyph'>::</span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-327"></a><span class='definition'>validateNamespaces1</span>
<a name="line-328"></a> <span class='keyglyph'>=</span> <span class='varid'>choiceA</span> <span class='keyglyph'>[</span> <span class='varid'>isRoot</span> <span class='conop'>:-></span> <span class='layout'>(</span> <span class='varid'>getChildren</span> <span class='varop'>>>></span> <span class='varid'>validateNamespaces1</span> <span class='layout'>)</span> <span class='comment'>-- root is correct by definition</span>
<a name="line-329"></a> <span class='layout'>,</span> <span class='varid'>this</span> <span class='conop'>:-></span> <span class='varid'>multi</span> <span class='varid'>validate1Namespaces</span>
<a name="line-330"></a> <span class='keyglyph'>]</span>
<a name="line-331"></a>
<a name="line-332"></a><span class='comment'>-- |</span>
<a name="line-333"></a><span class='comment'>-- a single node for namespace constrains.</span>
<a name="line-334"></a>
<a name="line-335"></a><a name="validate1Namespaces"></a><span class='definition'>validate1Namespaces</span> <span class='keyglyph'>::</span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-336"></a><span class='definition'>validate1Namespaces</span>
<a name="line-337"></a> <span class='keyglyph'>=</span> <span class='varid'>choiceA</span>
<a name="line-338"></a> <span class='keyglyph'>[</span> <span class='varid'>isElem</span> <span class='conop'>:-></span> <span class='varid'>catA</span> <span class='keyglyph'>[</span> <span class='layout'>(</span> <span class='varid'>getQName</span> <span class='varop'>>>></span> <span class='varid'>isA</span> <span class='layout'>(</span> <span class='varid'>not</span> <span class='varop'>.</span> <span class='varid'>isWellformedQName</span> <span class='layout'>)</span>
<a name="line-339"></a> <span class='layout'>)</span>
<a name="line-340"></a> <span class='varop'>`guards`</span> <span class='varid'>nsError</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='str'>"element name "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span> <span class='varop'>++</span> <span class='str'>" is not a wellformed qualified name"</span> <span class='layout'>)</span>
<a name="line-341"></a>
<a name="line-342"></a> <span class='layout'>,</span> <span class='layout'>(</span> <span class='varid'>getQName</span> <span class='varop'>>>></span> <span class='varid'>isA</span> <span class='layout'>(</span> <span class='varid'>not</span> <span class='varop'>.</span> <span class='varid'>isDeclaredNamespace</span> <span class='layout'>)</span>
<a name="line-343"></a> <span class='layout'>)</span>
<a name="line-344"></a> <span class='varop'>`guards`</span> <span class='varid'>nsError</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='str'>"namespace for prefix in element name "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span> <span class='varop'>++</span> <span class='str'>" is undefined"</span> <span class='layout'>)</span>
<a name="line-345"></a>
<a name="line-346"></a> <span class='layout'>,</span> <span class='varid'>doubleOcc</span> <span class='varop'>$<</span> <span class='layout'>(</span> <span class='layout'>(</span><span class='varid'>getAttrl</span> <span class='varop'>>>></span> <span class='varid'>getUniversalName</span><span class='layout'>)</span> <span class='varop'>>>.</span> <span class='varid'>doubles</span> <span class='layout'>)</span>
<a name="line-347"></a>
<a name="line-348"></a> <span class='layout'>,</span> <span class='varid'>getAttrl</span> <span class='varop'>>>></span> <span class='varid'>validate1Namespaces</span>
<a name="line-349"></a> <span class='keyglyph'>]</span>
<a name="line-350"></a>
<a name="line-351"></a> <span class='layout'>,</span> <span class='varid'>isAttr</span> <span class='conop'>:-></span> <span class='varid'>catA</span> <span class='keyglyph'>[</span> <span class='layout'>(</span> <span class='varid'>getQName</span> <span class='varop'>>>></span> <span class='varid'>isA</span> <span class='layout'>(</span> <span class='varid'>not</span> <span class='varop'>.</span> <span class='varid'>isWellformedQName</span> <span class='layout'>)</span>
<a name="line-352"></a> <span class='layout'>)</span>
<a name="line-353"></a> <span class='varop'>`guards`</span> <span class='varid'>nsError</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='str'>"attribute name "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span> <span class='varop'>++</span> <span class='str'>" is not a wellformed qualified name"</span> <span class='layout'>)</span>
<a name="line-354"></a>
<a name="line-355"></a> <span class='layout'>,</span> <span class='layout'>(</span> <span class='varid'>getQName</span> <span class='varop'>>>></span> <span class='varid'>isA</span> <span class='layout'>(</span> <span class='varid'>not</span> <span class='varop'>.</span> <span class='varid'>isDeclaredNamespace</span> <span class='layout'>)</span>
<a name="line-356"></a> <span class='layout'>)</span>
<a name="line-357"></a> <span class='varop'>`guards`</span> <span class='varid'>nsError</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='str'>"namespace for prefix in attribute name "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span> <span class='varop'>++</span> <span class='str'>" is undefined"</span> <span class='layout'>)</span>
<a name="line-358"></a>
<a name="line-359"></a> <span class='layout'>,</span> <span class='layout'>(</span> <span class='varid'>hasNamePrefix</span> <span class='varid'>a_xmlns</span> <span class='varop'>>>></span> <span class='varid'>xshow</span> <span class='varid'>getChildren</span> <span class='varop'>>>></span> <span class='varid'>isA</span> <span class='varid'>null</span>
<a name="line-360"></a> <span class='layout'>)</span>
<a name="line-361"></a> <span class='varop'>`guards`</span> <span class='varid'>nsError</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='str'>"namespace value of namespace declaration for "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span> <span class='varop'>++</span> <span class='str'>" has no value"</span> <span class='layout'>)</span>
<a name="line-362"></a>
<a name="line-363"></a> <span class='layout'>,</span> <span class='layout'>(</span> <span class='varid'>getQName</span> <span class='varop'>>>></span> <span class='varid'>isA</span> <span class='layout'>(</span><span class='varid'>not</span> <span class='varop'>.</span> <span class='varid'>isWellformedNSDecl</span> <span class='layout'>)</span>
<a name="line-364"></a> <span class='layout'>)</span>
<a name="line-365"></a> <span class='varop'>`guards`</span> <span class='varid'>nsError</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='str'>"illegal namespace declaration for name "</span> <span class='varop'>++</span> <span class='varid'>n</span> <span class='varop'>++</span> <span class='str'>" starting with reserved prefix "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='str'>"xml"</span> <span class='layout'>)</span>
<a name="line-366"></a> <span class='keyglyph'>]</span>
<a name="line-367"></a>
<a name="line-368"></a> <span class='layout'>,</span> <span class='varid'>isDTD</span> <span class='conop'>:-></span> <span class='varid'>catA</span> <span class='keyglyph'>[</span> <span class='varid'>isDTDDoctype</span> <span class='varop'><+></span> <span class='varid'>isDTDAttlist</span> <span class='varop'><+></span> <span class='varid'>isDTDElement</span> <span class='varop'><+></span> <span class='varid'>isDTDName</span>
<a name="line-369"></a> <span class='varop'>>>></span>
<a name="line-370"></a> <span class='varid'>getDTDAttrValue</span> <span class='varid'>a_name</span>
<a name="line-371"></a> <span class='varop'>>>></span>
<a name="line-372"></a> <span class='layout'>(</span> <span class='varid'>isA</span> <span class='layout'>(</span><span class='varid'>not</span> <span class='varop'>.</span> <span class='varid'>isWellformedQualifiedName</span><span class='layout'>)</span>
<a name="line-373"></a> <span class='varop'>`guards`</span>
<a name="line-374"></a> <span class='varid'>nsErr</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='str'>"a DTD part contains a not wellformed qualified Name: "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-375"></a> <span class='layout'>)</span>
<a name="line-376"></a>
<a name="line-377"></a> <span class='layout'>,</span> <span class='varid'>isDTDAttlist</span>
<a name="line-378"></a> <span class='varop'>>>></span>
<a name="line-379"></a> <span class='varid'>getDTDAttrValue</span> <span class='varid'>a_value</span>
<a name="line-380"></a> <span class='varop'>>>></span>
<a name="line-381"></a> <span class='layout'>(</span> <span class='varid'>isA</span> <span class='layout'>(</span><span class='varid'>not</span> <span class='varop'>.</span> <span class='varid'>isWellformedQualifiedName</span><span class='layout'>)</span>
<a name="line-382"></a> <span class='varop'>`guards`</span>
<a name="line-383"></a> <span class='varid'>nsErr</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='str'>"an ATTLIST declaration contains as attribute name a not wellformed qualified Name: "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-384"></a> <span class='layout'>)</span>
<a name="line-385"></a>
<a name="line-386"></a> <span class='layout'>,</span> <span class='varid'>isDTDEntity</span> <span class='varop'><+></span> <span class='varid'>isDTDPEntity</span> <span class='varop'><+></span> <span class='varid'>isDTDNotation</span>
<a name="line-387"></a> <span class='varop'>>>></span>
<a name="line-388"></a> <span class='varid'>getDTDAttrValue</span> <span class='varid'>a_name</span>
<a name="line-389"></a> <span class='varop'>>>></span>
<a name="line-390"></a> <span class='layout'>(</span> <span class='varid'>isA</span> <span class='layout'>(</span><span class='varid'>not</span> <span class='varop'>.</span> <span class='varid'>isNCName</span><span class='layout'>)</span>
<a name="line-391"></a> <span class='varop'>`guards`</span>
<a name="line-392"></a> <span class='varid'>nsErr</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='str'>"an entity or notation declaration contains a not wellformed NCName: "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-393"></a> <span class='layout'>)</span>
<a name="line-394"></a> <span class='keyglyph'>]</span>
<a name="line-395"></a> <span class='layout'>,</span> <span class='varid'>isPi</span> <span class='conop'>:-></span> <span class='varid'>catA</span> <span class='keyglyph'>[</span> <span class='varid'>getName</span>
<a name="line-396"></a> <span class='varop'>>>></span>
<a name="line-397"></a> <span class='layout'>(</span> <span class='varid'>isA</span> <span class='layout'>(</span><span class='varid'>not</span> <span class='varop'>.</span> <span class='varid'>isNCName</span><span class='layout'>)</span>
<a name="line-398"></a> <span class='varop'>`guards`</span>
<a name="line-399"></a> <span class='varid'>nsErr</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='str'>"a PI contains a not wellformed NCName: "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-400"></a> <span class='layout'>)</span>
<a name="line-401"></a> <span class='keyglyph'>]</span>
<a name="line-402"></a> <span class='keyglyph'>]</span>
<a name="line-403"></a> <span class='keyword'>where</span>
<a name="line-404"></a> <span class='varid'>nsError</span> <span class='keyglyph'>::</span> <span class='layout'>(</span><span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-405"></a> <span class='varid'>nsError</span> <span class='varid'>msg</span>
<a name="line-406"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='varid'>getQName</span> <span class='varop'>>>></span> <span class='varid'>arr</span> <span class='varid'>show</span><span class='layout'>)</span> <span class='varop'>>>></span> <span class='varid'>nsErr</span> <span class='varid'>msg</span>
<a name="line-407"></a>
<a name="line-408"></a> <span class='varid'>nsErr</span> <span class='keyglyph'>::</span> <span class='layout'>(</span><span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='conid'>LA</span> <span class='conid'>String</span> <span class='conid'>XmlTree</span>
<a name="line-409"></a> <span class='varid'>nsErr</span> <span class='varid'>msg</span> <span class='keyglyph'>=</span> <span class='varid'>arr</span> <span class='varid'>msg</span> <span class='varop'>>>></span> <span class='varid'>mkError</span> <span class='varid'>c_err</span>
<a name="line-410"></a>
<a name="line-411"></a> <span class='varid'>doubleOcc</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-412"></a> <span class='varid'>doubleOcc</span> <span class='varid'>an</span>
<a name="line-413"></a> <span class='keyglyph'>=</span> <span class='varid'>nsError</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='str'>"multiple occurences of universal name for attributes of tag "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>n</span> <span class='varop'>++</span> <span class='str'>" : "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>an</span> <span class='layout'>)</span>
<a name="line-414"></a>
<a name="line-415"></a><span class='comment'>-- ------------------------------------------------------------</span>
</pre></body>
</html>