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<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Copyright (C) 2009-2013 Simonsoft Nordic AB
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<xsl:stylesheet version="2.0"
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xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
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xmlns:cms="http://www.simonsoft.se/namespace/cms"
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>
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<!-- Experimental support for determining which declared namespaces are not actually used. -->
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<xsl:key name="ns_elem" match="*[namespace-uri() != '']" use="namespace-uri()"/>
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<xsl:key name="ns_attr" match="*/@*[namespace-uri() != '']" use="namespace-uri()"/>
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<xsl:template match="*" mode="#default">
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<xsl:element name="doc">
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<xsl:apply-templates select="." mode="i-ns-unused"/>
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</xsl:element>
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</xsl:template>
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<!-- Experimental support for determining which declared namespaces are not actually used. -->
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<!-- Investigates all namespaces declared on parent, which means they are inherited by this element. -->
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<xsl:template match="*" mode="i-ns-unused">
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<xsl:variable name="namespace-parent" select="parent::node()/namespace::*[string() != 'http://www.w3.org/XML/1998/namespace']"/>
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<xsl:for-each select="$namespace-parent">
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<xsl:variable name="nsuri" select="."></xsl:variable>
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<xsl:if test="count(key('ns_attr', $nsuri)) = 0 and count(key('ns_elem', $nsuri)) = 0">
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<xsl:value-of select="$nsuri"></xsl:value-of>
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<xsl:value-of select="' '"></xsl:value-of>
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</xsl:if>
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</xsl:for-each>
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</xsl:template>
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</xsl:stylesheet>
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.