Listing 4-1 shows the XML schema file mxmldoc.xsd which is included with Mini-XML. This schema file can be used to convert the XML files produced by mxmldoc into other formats.
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:annotation>
<xsd:documentation xml:lang="en">
Mini-XML 2.0 documentation schema for mxmldoc output.
Copyright 2003-2004 by Michael Sweet.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
</xsd:documentation>
</xsd:annotation>
<!-- basic element definitions -->
<xsd:element name="argument" type="argumentType"/>
<xsd:element name="class" type="classType"/>
<xsd:element name="constant" type="constantType"/>
<xsd:element name="description" type="xsd:string"/>
<xsd:element name="enumeration" type="enumerationType"/>
<xsd:element name="function" type="functionType"/>
<xsd:element name="mxmldoc" type="mxmldocType"/>
<xsd:element name="namespace" type="namespaceType"/>
<xsd:element name="returnvalue" type="returnvalueType"/>
<xsd:element name="seealso" type="identifierList"/>
<xsd:element name="struct" type="structType"/>
<xsd:element name="typedef" type="typedefType"/>
<xsd:element name="type" type="xsd:string"/>
<xsd:element name="union" type="unionType"/>
<xsd:element name="variable" type="variableType"/>
<!-- descriptions of complex elements -->
<xsd:complexType name="argumentType">
<xsd:sequence>
<xsd:element ref="type" minOccurs="1" maxOccurs="1"/>
<xsd:element ref="description" minOccurs="0" maxOccurs="1"/>
</xsd:sequence>
<xsd:attribute name="default" type="xsd:string" use="optional"/>
<xsd:attribute name="name" type="identifier" use="required"/>
<xsd:attribute name="direction" type="direction" use="optional" default="I"/>
</xsd:complexType>
<xsd:complexType name="classType">
<xsd:sequence>
<xsd:element ref="description" minOccurs="0" maxOccurs="1"/>
<xsd:choice minOccurs="0" maxOccurs="unbounded">
<xsd:element ref="class"/>
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<xsd:element ref="enumeration"/>
<xsd:element ref="function"/>
<xsd:element ref="struct"/>
<xsd:element ref="typedef"/>
<xsd:element ref="union"/>
<xsd:element ref="variable"/>
</xsd:choice>
</xsd:sequence>
<xsd:attribute name="name" type="identifier" use="required"/>
<xsd:attribute name="parent" type="xsd:string" use="optional"/>
</xsd:complexType>
<xsd:complexType name="constantType">
<xsd:sequence>
<xsd:element ref="description" minOccurs="0" maxOccurs="1"/>
</xsd:sequence>
<xsd:attribute name="name" type="identifier" use="required"/>
</xsd:complexType>
<xsd:complexType name="enumerationType">
<xsd:sequence>
<xsd:element ref="description" minOccurs="0" maxOccurs="1"/>
<xsd:element ref="constant" minOccurs="1" maxOccurs="unbounded"/>
</xsd:sequence>
<xsd:attribute name="name" type="identifier" use="required"/>
</xsd:complexType>
<xsd:complexType name="functionType">
<xsd:sequence>
<xsd:element ref="returnvalue" minOccurs="0" maxOccurs="1"/>
<xsd:element ref="description" minOccurs="0" maxOccurs="1"/>
<xsd:element ref="argument" minOccurs="1" maxOccurs="unbounded"/>
<xsd:element ref="seealso" minOccurs="0" maxOccurs="1"/>
</xsd:sequence>
<xsd:attribute name="name" type="identifier" use="required"/>
<xsd:attribute name="scope" type="scope" use="optional"/>
</xsd:complexType>
<xsd:complexType name="mxmldocType">
<xsd:choice minOccurs="0" maxOccurs="unbounded">
<xsd:element ref="class"/>
<xsd:element ref="enumeration"/>
<xsd:element ref="function"/>
<xsd:element ref="namespace"/>
<xsd:element ref="struct"/>
<xsd:element ref="typedef"/>
<xsd:element ref="union"/>
<xsd:element ref="variable"/>
</xsd:choice>
</xsd:complexType>
<xsd:complexType name="namespaceType">
<xsd:sequence>
<xsd:element ref="description" minOccurs="0" maxOccurs="1"/>
<xsd:choice minOccurs="0" maxOccurs="unbounded">
<xsd:element ref="class"/>
<xsd:element ref="enumeration"/>
<xsd:element ref="function"/>
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<xsd:element ref="struct"/>
<xsd:element ref="typedef"/>
<xsd:element ref="union"/>
<xsd:element ref="variable"/>
</xsd:choice>
</xsd:sequence>
<xsd:attribute name="name" type="identifier" use="required"/>
</xsd:complexType>
<xsd:complexType name="returnvalueType">
<xsd:sequence>
<xsd:element ref="type" minOccurs="1" maxOccurs="1"/>
<xsd:element ref="description" minOccurs="0" maxOccurs="1"/>
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="structType">
<xsd:sequence>
<xsd:element ref="description" minOccurs="0" maxOccurs="1"/>
<xsd:choice minOccurs="0" maxOccurs="unbounded">
<xsd:element ref="variable"/>
<xsd:element ref="function"/>
</xsd:choice>
</xsd:sequence>
<xsd:attribute name="name" type="identifier" use="required"/>
</xsd:complexType>
<xsd:complexType name="typedefType">
<xsd:sequence>
<xsd:element ref="type" minOccurs="1" maxOccurs="1"/>
<xsd:element ref="description" minOccurs="0" maxOccurs="1"/>
</xsd:sequence>
<xsd:attribute name="name" type="identifier" use="required"/>
</xsd:complexType>
<xsd:complexType name="unionType">
<xsd:sequence>
<xsd:element ref="description" minOccurs="0" maxOccurs="1"/>
<xsd:element ref="variable" minOccurs="0" maxOccurs="unbounded"/>
</xsd:sequence>
<xsd:attribute name="name" type="identifier" use="required"/>
</xsd:complexType>
<xsd:complexType name="variableType">
<xsd:sequence>
<xsd:element ref="type" minOccurs="1" maxOccurs="1"/>
<xsd:element ref="description" minOccurs="0" maxOccurs="1"/>
</xsd:sequence>
<xsd:attribute name="name" type="identifier" use="required"/>
</xsd:complexType>
<!-- data types -->
<xsd:simpleType name="direction">
<xsd:restriction base="xsd:string">
<xsd:enumeration value="I"/>
<xsd:enumeration value="O"/>
<xsd:enumeration value="IO"/>
</xsd:restriction>
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</xsd:simpleType>
<xsd:simpleType name="identifier">
<xsd:restriction base="xsd:string">
<xsd:pattern value="[a-zA-Z_(.]([a-zA-Z_(.,)* 0-9])*"/>
</xsd:restriction>
</xsd:simpleType>
<xsd:simpleType name="identifierList">
<xsd:list itemType="identifier"/>
</xsd:simpleType>
<xsd:simpleType name="scope">
<xsd:restriction base="xsd:string">
<xsd:enumeration value=""/>
<xsd:enumeration value="private"/>
<xsd:enumeration value="protected"/>
<xsd:enumeration value="public"/>
</xsd:restriction>
</xsd:simpleType>
</xsd:schema>
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