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From Marshall Schor <...@schor.com>
Subject Problem with creating type systems with extra features merged from JCas class definitions - needs some creative thinking
Date Fri, 19 Jan 2018 02:37:37 GMT
A recent Jira, https://issues.apache.org/jira/browse/UIMA-5698 changed how type
systems are committed, by adding features to types that were found in the JCas
class definition but were missing in the type system.

This was done to help a use case where JCas classes are loaded, once, but used
for different versions of type system definitions, having different numbers of
features.

The trouble with this is that it breaks several serializations (where the type
system is required to be "known", for example Cas Complete serialization),
because the layout of the serialized format is with respect to the type system
which created the serialization.

I'm not sure what a reasonable solution to this issue is; thoughts welcomed :-)

-Marshall


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