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https://issues.apache.org/jira/browse/UIMA-1257?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on UIMA-1257 started by Adam Lally.
> Type System Merging Should Produce Consistent Ordering of Types
> ---------------------------------------------------------------
>
> Key: UIMA-1257
> URL: https://issues.apache.org/jira/browse/UIMA-1257
> Project: UIMA
> Issue Type: Improvement
> Components: Core Java Framework
> Affects Versions: 2.2.2
> Reporter: Adam Lally
> Assignee: Adam Lally
> Priority: Minor
> Fix For: 2.3
>
>
> Currently when type systems are merged across annotators, the ordering of the
> types produced by the merge method is not defined, and varies according to
> the ordering in which the individual type system descriptors are passed to
> the merge method. The ordering depends on the order in which individual AEs
> are initialized, which is also not defined, and may even vary according to
> JVM version.
> One reason to improve this is that UIMA-AS has a feature to allow binary
> serialization, but it requires that type systems be identical on both sides
> of the connection, and it is difficult to ensure this if ordering cannot be
> relied on.
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