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https://issues.apache.org/jira/browse/LUCENE-2358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12851652#action_12851652
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Steven Rowe commented on LUCENE-2358:
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Hi Robert,
I'm working on a change to ShingleFilter to not output "_" filler token
unigrams (or generally, filler-only ngrams, to cover the case where position
increment gaps exceed n).
I needed to be able to mark cached tokens as being filler tokens (or not) - a
boolean attribute. After trying to write a new private-use attribute and
failing (I didn't make both an interface and an implementation, I think - I
should figure it out and improve the docs I guess), I found KeywordAttribute
and have used it to mark whether or not a cached token is a filler token
(keyword:yes => filler-token:yes).
Would it make sense to have a generalized boolean attribute, specialized for
keywords or (fill-in-the-blank)? It's a small leap to say that "iskeyword"
means true for whatever boolean attribute you want to carry, so this isn't
really a big deal, but I thought I'd bring it up while you're thinking about
naming this thing.
(This may be a can of worms: if there is a generic boolean attribute, should
there be generic string/int/float/etc. attributes too?)
Steve
> rename KeywordMarkerTokenFilter
> -------------------------------
>
> Key: LUCENE-2358
> URL: https://issues.apache.org/jira/browse/LUCENE-2358
> Project: Lucene - Java
> Issue Type: Task
> Components: Analysis
> Reporter: Robert Muir
> Priority: Trivial
> Attachments: LUCENE-2358.patch
>
>
> I would like to rename KeywordMarkerTokenFilter to KeywordMarkerFilter.
> We havent released it yet, so its a good time to keep the name brief and
> consistent.
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