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https://issues.apache.org/jira/browse/TINKERPOP-848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17465851#comment-17465851
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ASF GitHub Bot commented on TINKERPOP-848:
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amatiushkin commented on pull request #1485:
URL: https://github.com/apache/tinkerpop/pull/1485#issuecomment-1001710342


   @spmallette Thanks for the ping. I'll close this PR for now and re-open once 
it is ready for a review.


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> Support default attribute values in GraphMLReader
> -------------------------------------------------
>
>                 Key: TINKERPOP-848
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP-848
>             Project: TinkerPop
>          Issue Type: Improvement
>          Components: io
>    Affects Versions: 3.0.2-incubating
>            Reporter: Pavel Klinov
>            Priority: Trivial
>   Original Estimate: 2h
>  Remaining Estimate: 2h
>
> Looking at the code of GraphMLReader I see that it doesn't support default 
> values of attributes, which are allowed by the GraphML spec. This is a bit 
> annoying especially if the input defines default values for attributes which 
> are used for mandatory data, e.g. edge labels. 
> One small example is the sample graph at [1]. "d_e" is the label attribute 
> with a default value. There're <edge .. /> elements w/o body later in the 
> document and reading those will throw a "java.lang.IllegalArgumentException: 
> Label can not be null" exception (if the vendor considers edge labels 
> mandatory).
> I'd personaly squash both keyIdMap and keyTypesMap into a single String -> 
> AttrInfo map, where AttrInfo would contain information about the data 
> attribute name, type, and the default value.
> [1] http://www.eecs.wsu.edu/~yyao/DirectedStudyI/Datasets/AS/sample.graphml



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