Including a schema without namespace into a schema with namespace is not
possible
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Key: WSCOMMONS-78
URL: http://issues.apache.org/jira/browse/WSCOMMONS-78
Project: WS-Commons
Issue Type: Bug
Components: XmlSchema
Reporter: Jochen Wiedmann
Attachments: XmlSchema-Include-Without-Namespace.patch
The XML Schema specification states in "4.2.1 Assembling a schema for a single
target namespace from multiple schema definition documents":
2 One of the following must be true:
...
2.3 SII has no targetNamespace [attribute] (but SII' does).
3 The appropriate case among the following must be true:
...
3.2 If clause 2.3 above is satisfied, then the schema corresponding to the
<include>d item's parent <schema> must include not only definitions
or declarations corresponding to the appropriate members of its own
[children], but also components identical to all the - schema components- of I,
except that anywhere the - absent- target namespace name would have
appeared, the - actual value- of the targetNamespace [attribute] of SII' is
used.
In particular, it replaces - absent- in the following places:
3.2.1 The {target namespace} of named schema components, both at the top
level and (in the case of nested type definitions and nested attribute and
element declarations whose code was qualified) nested within definitions;
3.2.2 The {namespace constraint} of a wildcard, whether negated or not;
In other words, it is possible to include a schema without namespace, as if it
had the namespace of the including schema.
Unfortunately this fails with XmlSchema, as the attached patch demonstrates.
The patch includes a simple test case and could be applied, if this bug is
fixed.
Suggested resolution, as realized in JaxMeXS: If such a schema is being parsed,
then mutable instances of QName should be created, which would always
return the target namespace of the schema.
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