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<?xml version="1.0" encoding="UTF-8"?>
<!--
RELAX NG schema for http://people.freedesktop.org/~hughsient/appdata/
Written by Simon Kågedal Reimer 2013 <skagedal@gmail.com>, Peter
Oliver <git@mavit.org.uk>.
Released as Public Domain (CC0 1.0)
appdata.rnc is the source; appdata.rng is generated with trang.
Don't edit appdata.rng.
-->
<grammar xmlns:sch="http://purl.oclc.org/dsdl/schematron" xmlns="http://relaxng.org/ns/structure/1.0" datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
<start>
<ref name="application"/>
</start>
<define name="application">
<element name="application">
<interleave>
<ref name="id"/>
<ref name="licence"/>
<zeroOrMore>
<ref name="name"/>
</zeroOrMore>
<zeroOrMore>
<ref name="summary"/>
</zeroOrMore>
<ref name="description"/>
<optional>
<ref name="screenshots"/>
</optional>
<zeroOrMore>
<ref name="url"/>
</zeroOrMore>
<optional>
<ref name="updatecontact"/>
</optional>
</interleave>
</element>
</define>
<define name="id">
<element name="id">
<!-- Other types? -->
<attribute name="type">
<value type="string" datatypeLibrary="">desktop</value>
</attribute>
<text/>
</element>
</define>
<!-- Other licences? Worth restricting this at all, or use free content? -->
<define name="licence">
<element name="licence">
<choice>
<value type="string" datatypeLibrary="">CC0</value>
<value type="string" datatypeLibrary="">CC BY</value>
<value type="string" datatypeLibrary="">CC BY-SA</value>
</choice>
</element>
</define>
<define name="name">
<element name="name">
<optional>
<ref name="XmlLang"/>
</optional>
<text/>
</element>
</define>
<sch:pattern>
<sch:rule context="/application">
<sch:assert test="count(name[not(@xml:lang)]) < 2">Excluding translations, at most one name element is permitted.</sch:assert>
<sch:assert test="count(name) = count(name[not(@xml:lang=preceding-sibling::name/@xml:lang)])">At most one name element is permitted per language.</sch:assert>
</sch:rule>
</sch:pattern>
<define name="summary">
<element name="summary">
<optional>
<ref name="XmlLang"/>
</optional>
<text/>
</element>
</define>
<sch:pattern>
<sch:rule context="/application">
<sch:assert test="count(summary[not(@xml:lang)]) < 2">Excluding translations, at most one summary element is permitted.</sch:assert>
<sch:assert test="count(summary) = count(summary[not(@xml:lang=preceding-sibling::summary/@xml:lang)])">At most one summary element is permitted per language.</sch:assert>
</sch:rule>
</sch:pattern>
<define name="description">
<element name="description">
<zeroOrMore>
<choice>
<ref name="p"/>
<ref name="ul"/>
<ref name="ol"/>
</choice>
</zeroOrMore>
</element>
</define>
<define name="p">
<element name="p">
<optional>
<ref name="XmlLang"/>
</optional>
<text/>
</element>
</define>
<define name="ul">
<element name="ul">
<optional>
<ref name="XmlLang"/>
</optional>
<ref name="Entries"/>
</element>
</define>
<define name="ol">
<element name="ol">
<optional>
<ref name="XmlLang"/>
</optional>
<ref name="Entries"/>
</element>
</define>
<define name="Entries">
<oneOrMore>
<element name="li">
<optional>
<ref name="XmlLang"/>
</optional>
<text/>
</element>
</oneOrMore>
</define>
<define name="screenshots">
<element name="screenshots">
<oneOrMore>
<ref name="screenshot"/>
</oneOrMore>
</element>
</define>
<define name="screenshot">
<element name="screenshot">
<optional>
<attribute name="type">
<value type="string" datatypeLibrary="">default</value>
</attribute>
</optional>
<!-- Other types? -->
<attribute name="width">
<data type="integer"/>
</attribute>
<attribute name="height">
<data type="integer"/>
</attribute>
<optional>
<ref name="XmlLang"/>
</optional>
<data type="anyURI">
<except>
<value/>
</except>
</data>
</element>
</define>
<define name="url">
<element name="url">
<optional>
<attribute name="type">
<value type="string" datatypeLibrary="">homepage</value>
</attribute>
</optional>
<!-- Other types? -->
<group>
<data type="anyURI">
<except>
<value/>
</except>
</data>
</group>
</element>
</define>
<define name="updatecontact">
<element name="updatecontact">
<text/>
</element>
</define>
<define name="XmlLang">
<attribute name="xml:lang"/>
</define>
</grammar>
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