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I'm sure this is an old chestnut, but as long as we're on the topic of
expanded value spaces for restricted types:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";>
<xs:element name="root">
<xs:complexType>
<xs:sequence>
<xs:element name="foo" type="testString" maxOccurs="4"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:simpleType name="testString">
<xs:restriction base="xs:string">
<xs:pattern value="This is a test"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="testStringR">
<xs:restriction base="testString">
<xs:whiteSpace value="collapse"/>
</xs:restriction>
</xs:simpleType>
</xs:schema>
The type testStringR is actually less restrictive than it's base in terms of
the values it accepts:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<root
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:noNamespaceSchemaLocation="ws.xsd">
<foo>This is a test</foo>
<foo xsi:type="testStringR">This is a test</foo>
<foo xsi:type="testStringR">This is a test</foo> <!--
restricted type accepts -->
<foo>This is a test</foo>
<!-- base type fails -->
</root>
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