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Caveat: For this to work, the schemas being combined must have target namespaces, and they all must be distinct target namespaces.
Issue:
is a bug (in Daffodil 3.8.0 and prior) which, until fixed prevents combining from working for schemas with no namespace.
Jira
server ASF JIRA serverId 5aa69414-a9e9-3523-82ec-879b028fb15b key DAFFODIL-2916 Hint: if DFDL schemas follow the style suggestions in DFDL Schema Style Guide, they are much easier to combine/compose together.
Let's assume you have 3 different message types, A, B, and C. Each has a DFDL schema file a.dfdl.xsd, b.dfdl.xsd, and c.dfdl.xsd.
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<schema xmlns xmlns="http://www.w3.org/2001/XMLSchema" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:a="urn:a" targetNamespace="urn:a"> <element name="a_msg" type="a:a_msg_type"/> ... plus type definitions </schema> |
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<schema xmlns xmlns="http://www.w3.org/2001/XMLSchema" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:b="urn:b" targetNamespace="urn:b"> <element name="b_msg" type="b:b_msg_type"/> ... plus type definitions </schema> |
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<schema xmlns xmlns="http://www.w3.org/2001/XMLSchema" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:c="urn:c" targetNamespace="urn:c"> <element name="c_msg" type="c:c_msg_type"/> ... plus type definitions </schema> |
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