XML DB when you have a lot of XSDs....
My client has a data situation where we have a lot of XSD schemas (and multiple versions of each XSD) which describe data that needs to be loaded.
If I wanted to use schema-based / structured-storage....Can the same xmltype column be mapped to multiple XSDs? Or would I have to create a different Oracle xmltype column for every unique XSD that I have?
We have approximately 100 different XSD schemas and up to 7 versions of each schema. If I have to map each xmltype column to a unique schema, then that would require up to 700 different xmltype columns.
Is there a better way?
From reading the documentation "XML DB Developer Guide" (chap 6), it depends on the storage type you assign your schema when you register it. By defaults, it's Object-Relational which must use the same schema for all rows of a XMLType table or column, but if you use Binary XML storage, and specify ANYSCHEMA, then in theory you can have rows using different schemas, as long as the schemas as registered with XML DB. But apparently, you then can't restrict which set of schemas to use, any document confirming to any registered schema can be inserted. Maybe a restriction on which subset of schemas are "valid" can be implemented via triggers, but I don't know.
Note that I "just" read this in the doc. I have no practical experience with this yet. --DD
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Edited by: steffi on Mar 8, 2011 8:56 PM
Edited by: steffi on Mar 8, 2011 8:57 PM
Edited by: steffi on Mar 8, 2011 8:58 PMDear Steffi,
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