52 lines
2.8 KiB
XML
52 lines
2.8 KiB
XML
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<?xml version="1.0" encoding="UTF-8" ?>
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<xs:schema targetNamespace="https://www.rssboard.org/rss-specification/"
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xmlns="https://www.rssboard.org/rss-specification"
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xmlns:rss="https://www.rssboard.org/rss-specification"
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xmlns:xs="http://www.w3.org/2001/XMLSchema"
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elementFormDefault="qualified"
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attributeFormDefault="unqualified">
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<xs:include schemaLocation="../lib/types/net.xsd"/>
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<xs:include schemaLocation="../lib/types/rss2.0.xsd"/>
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<!--
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CURRENT RSS VERSION: 2.0.8
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It should be specified as an <rss> attribute as `version="2.0"`, though.
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-->
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<!-- ROOT -->
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<xs:element name="rss">
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<xs:complexType>
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<xs:all>
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<xs:element name="channel" minOccurs="1" maxOccurs="1">
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<!--
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This is my *opinion*. RSS 2.0 specification does not indicate if the elements should be in order or not.
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I enforce it for easy conformance to spec and to remove any ambiguity.
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I base the ordering on the sample 2.0 feed (https://www.rssboard.org/files/sample-rss-2.xml).
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-->
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<xs:sequence>
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<xs:element name="title" type="xs:normalizedString" minOccurs="1" maxOccurs="1"/>
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<xs:element name="link" type="t_net_http_basic_uri" minOccurs="1" maxOccurs="1"/>
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<xs:element name="description" type="xs:string" minOccurs="1" maxOccurs="1"/>
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<!--
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TODO: This has a pattern definition per:
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https://www.rssboard.org/rss-language-codes
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https://www.w3.org/TR/REC-html40/struct/dirlang.html#langcodes
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Maybe an enumeration at some point? But it's... thousands of possible combinations.
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And allowances are made for non-official ones, too.
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-->
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<xs:element name="language" type="xs:normalizedString" minOccurs="0" maxOccurs="1" default="en-us"/>
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<xs:element name="copyright" type="xs:normalizedString" minOccurs="0" maxOccurs="1"/>
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<xs:element name="managingEditor" type="xs:normalizedString" minOccurs="0" maxOccurs="1"/>
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</xs:sequence>
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</xs:element>
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</xs:all>
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<!--
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There isn't really a well-defined type string in the RSS spec for what version's valid values ARE, as they specify the version.
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"xs:token" should be safe/sane enough.
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-->
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<xs:attribute name="version" type="xs:token" use="required"/>
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</xs:complexType>
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</xs:element>
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</xs:schema>
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