[xml] Multiple XML Schema Includes

[Adam Trachtenberg <adam trachtenberg com>]

I'm trying to validate a file against an XML Schema that includes the 
same schema file multiple times. libxml2 2.6.3 considers this a schema 
redefinition error. However, I believe this is a bug.

According the the spec, you are explicitly allowed to reinclude a 
schema. See http://www.w3.org/TR/xmlschema-1/#compound-schema, 
specifically the part at the bottom that says:

> NOTE: The above is carefully worded so that multiple <include>ing of 
> the same schema document will not constitute a violation of clause 2 
> of Schema Properties Correct (§3.15.6), but applications are allowed, 
> indeed encouraged, to avoid<include>ing the same schema document more 
> than once to forestall the necessity of establishing identity 
> component by component.

While I take their encouragement to heart, I'm merely validating 
against a third-party schema here, so I'm unable to alter the schema 
design.

Do other people agree this is a bug in libxml2 or am I misreading the 
spec? I am far from an XML Schema expert.

-adam

--
adam trachtenberg
adam trachtenberg com