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Question
How do you make Attribute and Restriction work together in harmony in an XML schema?
I want to have XML elements that look the following:
<MyElement myAttr="true">5</MyElement
I want a restructed value on my element (1-10) plus an attribute. I can't get the attribute and the restricted type to work together in an XML schema. I've tried the following and always get errors:
<xs:element name="MyElement" default="4">
<xs:complexType mixed="true">
<xs:simpleContent>
<xs:restriction base="xs:unsignedInt">
<xs:minInclusive value="1" />
<xs:maxInclusive value="10" />
</xs:restriction>
<xs:extension base="xs:boolean">
<xs:attribute name="myAttr" type="xs:boolean" use="required" />
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
I've also tried removing the extension and just having:
<xs:element name="MyElement" default="4">
<xs:complexType mixed="true">
<xs:simpleContent>
<xs:restriction base="xs:unsignedInt">
<xs:minInclusive value="1" />
<xs:maxInclusive value="10" />
</xs:restriction>
<xs:attribute name="myAttr" type="xs:boolean" use="required" />
</xs:simpleContent>
</xs:complexType>
</xs:element>
Any ideas what I'm doing wrong here. What can I do to make all of these elements happy together? Thanks!
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by: GertonePosted on 2008-08-07 at 12:49:19ID: 22184659
you have a weird mix of restriction and extension.
I suggest that you make a simpleType which is named and then used as a base for extension
something like this
<xs:element name="MyElement" default="4">
<xs:complexType mixed="true">
<xs:simpleContent>
<xs:extension base="myType">
<xs:attribute name="myAttr" type="xs:boolean" use="required" />
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
<xs:simpleType name="myType">
<xs:restriction base="xs:unsignedInt">
<xs:minInclusive value="1" />
<xs:maxInclusive value="10" />
</xs:restriction>
</xs:simpleType>