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https://issues.apache.org/jira/browse/UIMA-4685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15421405#comment-15421405
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Richard Eckart de Castilho commented on UIMA-4685:
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Well, or the interpretation would simply be to ignore it. My idea is that an 
external TS(I) is used when the user wanted to safe space by saving n form 6 
files with only 1 external TS(I) file - instead of writing the TS(I) to all 
form 6 files. That is a tradeoff between space and convenience. Saving the TSI 
directly in all files "wastes" space but is more convenient e.g. when sharing 
data as the user can never forget to pass the TSI to a colleague along with the 
shared data.

> Add Common Load/Save APIs, including type system and index defs, for various 
> CAS formats
> ----------------------------------------------------------------------------------------
>
>                 Key: UIMA-4685
>                 URL: https://issues.apache.org/jira/browse/UIMA-4685
>             Project: UIMA
>          Issue Type: New Feature
>          Components: CasEditor, Core Java Framework
>    Affects Versions: 2.8.1SDK
>            Reporter: Peter Klügl
>            Assignee: Peter Klügl
>             Fix For: 2.9.0SDK
>
>         Attachments: BinaryCasIOUtils.java, caseditor.csv, 
> caseditor_bincas.csv
>
>
> Create a new CasIOUtils class having common load and save APIs, with optional 
> saving of type system and index definitions, in all the various CAS 
> serialization formats (except JSON).  Implement heuristic discovery for 
> deserialization to support automatic selection of the right kind of 
> deserializer.  Update the headers for binary to support indicating they have 
> the type system included (not used yet).  Update the SerialFormat to support 
> this.  Update the CasEditor and other components to use this new API.



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