The following schema definition produces an exception in the Xerces
validator (version 1.5.1, line 2964 of TraverseSchema.cpp file, method
TraverseSchema::traverseSimpleContentDecl() ): -
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema";>
<xsd:element name="ServiceCall">
<xsd:complexType>
<xsd:sequence>
<xsd:element ref="MiddlewareHeader" minOccurs='1' maxOccurs='1'/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
<xsd:element name="MiddlewareHeader">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="INF_SVCNAME" type="INF_SVCNAME"
nillable="false"/>
<xsd:element name="INF_VERSIONNO"
type="INF_VERSIONNO" nillable="false"/>
</xsd:sequence>
<xsd:attribute name="version" type="xsd:string" use='required'/>
</xsd:complexType>
</xsd:element>
<xsd:complexType name="INF_SVCNAME">
<xsd:simpleContent>
<xsd:extension base="xsd:string">
<xsd:attribute name="Row" type="xsd:integer"
use="optional"/>
</xsd:extension>
</xsd:simpleContent>
</xsd:complexType>
<xsd:complexType name="INF_VERSIONNO">
<xsd:restriction base="xsd:string">
<xsd:minLength value="1"/>
<xsd:whiteSpace value="preserve"/>
<xsd:maxLength value="50"/>
</xsd:restriction>
</xsd:complexType>
</xsd:schema>
The error message generated is: -
Error at file d:\xerces-c-src1_5_1\samples\data\Abbey test 2.xml, line 2,
char 117
Message: The type 'xsd:string' is a simple type. It cannot be used in a
derivation by RESTRICTION for a complexType
Error at file d:\xerces-c-src1_5_1\samples\data\Abbey test 2.xml, line 7,
char 32
Message: Attribute '{}Row' is not declared for element 'INF_VERSIONNO'
If I change the restriction to an extension, like the INF_SVCNAME element
(obviously removing the min/maxlength and white space elements) then it
works fine. The W3C recommendation implies that restriction is a valid
content type
(http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/#element-simpleContent),
so what am I doing wrong?
Tony.
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