2 <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
3 targetNamespace="urn:test:foo"
4 xmlns:foo="urn:test:foo">
6 <!-- Substitution group heads. -->
7 <xsd:element name="gh-A" abstract="true"/>
8 <xsd:element name="gh-B" abstract="true"/>
10 <!-- Substitution group members. -->
11 <xsd:element name="gm-A-1" substitutionGroup="foo:gh-A"/>
12 <xsd:element name="gm-A-2" substitutionGroup="foo:gh-A"/>
14 <xsd:element name="gm-B-1" substitutionGroup="foo:gh-B"/>
15 <xsd:element name="gm-B-2" substitutionGroup="foo:gh-B"/>
17 <xsd:element name="foo">
20 <xsd:element ref="foo:gh-A"/>
21 <xsd:element ref="foo:gh-B"/>