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In #4105, many improvements were made to simplify the namespace configuration in p2j.cfg.xml.

I have 2 additional requests:

• Let's set default="true" by default. I'm finding that I'm nearly always having to explicitly code this. I think it should be the opposite: if we don't want something defaulted, then we explicitly code default="false".
• By default, all namespaces should automatically get the metadata defined. We should not have to copy <namespace name="standard" /> into every profile.

With 13811, the metadata schema can be loaded twice. This was seen in a customer project which then had ambiguous references (e.g. unexpected token: _file._file-name). The code needs to be protected from this. It should be loaded by default but never loaded twice. We had to force default=false in the global metadata schema namespace to avoid this, but that is just a workaround.

Constantin: Can you provide any other clarification?

What was frustrating was that in my local testing worked, but with the main project it abended - and this was only because the standard namespace (in p2j.cfg.xml) was located first in the <schema> children, while in that project it was last. This somehow triggered loading it twice and abended.