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List:       xerces-j-user
Subject:    RE: passive grammar caching + invalid schemas
From:       "Aleksandar Milanovic" <amilanovic () galdosinc ! com>
Date:       2002-08-21 5:43:25
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Just a small clarification:

The invalid schema could be (I am not sure) one of the "external" schemas or
any schema that the external schemas include or import, directly or
indirectly. So, it is needed for completeness of the schema, but it may be
that its definitions are not used in the instance document that is being
validated.

Alex

-----Original Message-----
From: Aleksandar Milanovic [mailto:amilanovic@galdosinc.com]
Sent: August 20, 2002 10:40 PM
To: xerces-j-user@xml.apache.org
Subject: passive grammar caching + invalid schemas


Hi,

My app uses passive schema caching with external schema locations. If one of
the schemas is invalid (might be an included schema too), document
validation fails at first attempt but succeeds on subsequent attempts. On
the first and failed validation attempt, Xerces complains about schema
errors. However, on subsequent validations it has already parsed the schemas
so document validation is then successful. To be honest, right now I am not
sure if the invalid schema is needed for the validation of the document,
i.e. it may be that document validation is successful because it doesn't
require the invalid schema.

It'd be interesting to hear what Xerces developers have to say about this,
i.e. how does an erroneous schema influence document validation (using the
new grammar [caching] capabilities).

thx
Alex



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