I can't see anything wrong with this. It works fine in Saxon.
Perhaps you can ignore the warning?
Michael Kay
http://www.saxonica.com/
> -----Original Message-----
> From: Thorsten Rock [mailto:]
> Sent: 27 June 2008 12:52
> To:
> Subject: [xml-dev] Problem with cascading XML Schemas
>
> For maximum scalability I want to use cascading xml schemas;
> for example one schema for basic datatypes (schema A), one
> for a group of applications (schema B) and one for the
> application itself (schema C). To keep everything clearly
> laid out, I'd prefer every schema to have it's own namespace.
>
> However, if I import schema A into schema B and then import
> schema B into schema C, I can't access schema A's datatypes
> from schema C.
>
> If I import schema A into schema B and then import schema A
> _and_ schema B into schema C, I get an validation error in
> schema C ("Warning - one of the grammar(s) returned from the
> user's grammar pool is in conflict with another grammar").
>
> SCHEMA A (schema_basic.xsd):
>
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema xmlns = "http://www.acme.org/basic"
> targetNamespace = "http://www.acme.org/basic"
> xmlns:xs = "http://www.w3.org/2001/XMLSchema">
> <xs:simpleType name="smallRange">
> <xs:restriction base="xs:integer">
> <xs:minInclusive value="2"/>
> <xs:maxInclusive value="5"/>
> </xs:restriction>
> </xs:simpleType>
> </xs:schema>
>
> SCHEMA B (schema_extended.xsd):
>
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema xmlns:basic = "http://www.acme.org/basic"
> xmlns = "http://www.acme.org/extended"
> targetNamespace = "http://www.acme.org/extended"
> xmlns:xs = "http://www.w3.org/2001/XMLSchema">
> <xs:import namespace="http://www.acme.org/basic"
> schemaLocation="schema_basic.xsd"/>
> <xs:simpleType name="extendedRange">
> <xs:union memberTypes="basic:smallRange">
> <xs:simpleType>
> <xs:restriction base="xs:string">
> <xs:enumeration value="more"/>
> </xs:restriction>
> </xs:simpleType>
> </xs:union>
> </xs:simpleType>
> </xs:schema>
>
> SCHEMA C (schema.xsd):
>
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema xmlns:basic = "http://www.acme.org/basic"
> xmlns:ext = "http://www.acme.org/extended"
> xmlns = "http://www.acme.org/specific"
> targetNamespace = "http://www.acme.org/specific"
> xmlns:xs = "http://www.w3.org/2001/XMLSchema">
> <xs:import namespace="http://www.acme.org/basic"
> schemaLocation="schema_basic.xsd"/>
> <xs:import namespace="http://www.acme.org/extended"
> schemaLocation="schema_extended.xsd"/>
> <xs:element name="quantities">
> <xs:complexType>
> <xs:sequence>
> <xs:element name="quantity"
> type="basic:smallRange"/>
> <xs:element
> name="large_quantity" type="ext:extendedRange"/>
> </xs:sequence>
> </xs:complexType>
> </xs:element>
> </xs:schema>
>
> What's my mistake here? What would be a sensible approach
> when I want to keep schema A, B and C in different namespaces?
>
> Thank you very much
> Thorsten Rock
>
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