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https://issues.apache.org/jira/browse/DAFFODIL-2916?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Lawrence resolved DAFFODIL-2916.
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Resolution: Fixed
Regression fixed in commit e02ae7fff4ad7cccadcef2bfc03c17c941704d56
> xs:include of no-namespace schema does not chameleon the references properly
> ----------------------------------------------------------------------------
>
> Key: DAFFODIL-2916
> URL: https://issues.apache.org/jira/browse/DAFFODIL-2916
> Project: Daffodil
> Issue Type: Bug
> Components: Front End
> Affects Versions: 3.8.0
> Reporter: Mike Beckerle
> Assignee: Steve Lawrence
> Priority: Major
> Fix For: 3.9.0
>
>
> Discovered when doing experiments trying to combine smaller schemas together
> into larger schemas.
> We want to take a no-namespace schema, such as jpeg.dfdl.xsd (from
> DFDLSchemas), and include it into a schema that gives it a target namespace.
> For example suppose we create jpeg-ns.dfdl.xsd which is supposed to have a
> target namespace and it includes jpeg.dfdl.xsd.
> The symbols in jpeg.dfdl.xsd are supposed to take on the new namespace of the
> file they are included into.
> And here is what isn't working: references within jpeg.dfdl.xsd to global
> elements/types/groups within that schema (which means they are referencing
> global elements with no namespace) are supposed to end up referencing those
> same elmeents, but in the new namespace into which the schema was included.
> This doesn't happen. You get SDEs about there being no definition for
> "{}empty", that is, the reference is to empty is also supposed to "chameleon"
> to be a reference to the new global element in the new chameleon namespace.
> Per: Definitive XML Schema, Walmsley, ISBN: 0-13-065567-8. Chapter 4 (Schema
> Composition) Section 4.4.1 (Include) Example 4-4, pages 67-68.
> In detail, suppose you create jpeg-ns.dfdl.xsd like this:
> {code:java}
> <xs:schema targetNamespace="urn:jpeg" ...>
> <xs:include schemaLocation="jpeg.dfdl.xsd"/>
> </xs:schema>{code}
> That should be all that is required to define a namespace-qualified version
> of jpeg.
> Now you define a combined schema which combines jpeg and other schemas
> together like this:
> {code:java}
> <xs:schema targetNamespace="urn:combined" xmlns:jpeg="urn:jpeg"...>
> <xs:import namespace="urn:jpeg" schemaLocation="jpeg-ns.dfdl.xsd"/>
> ...
> <xs:complexType name="combo">
> <xs:choice>
> <xs:element ref="jpeg:JFIF"/>
> ...
> </xs:choice>
> </xs:complexType>
> </xs:schema>{code}
> That *should* work. It doesn't. There's a global type defined and referenced
> in jpeg.dfdl.xsd named "empty".
> The SDE one gets is that "{}empty" is not found.
> But the xs:include should be converting that reference from one referring to
> the original no-namespace declaration to a reference to the new chameleon
> namespaced insteance of that type.
>
>
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