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https://issues.apache.org/jira/browse/CTAKES-266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13821424#comment-13821424
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ASF subversion and git services commented on CTAKES-266:
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Commit 1541553 from [~tmill] in branch 'ctakes/trunk'
[ https://svn.apache.org/r1541553 ]
Fixes CTAKES-266. Checks for zero-length word token before creating token
before contraction.
> tokenizer creates empty tokens before contractions
> --------------------------------------------------
>
> Key: CTAKES-266
> URL: https://issues.apache.org/jira/browse/CTAKES-266
> Project: cTAKES
> Issue Type: Bug
> Components: ctakes-core
> Affects Versions: 3.1
> Reporter: Tim Miller
> Assignee: Tim Miller
> Priority: Minor
> Fix For: 3.1.1
>
>
> Normally contractions are tokenized as follows:
> don't = do + n't
> And the code in ContractionsPTB will create a WordToken for the do and a
> ContractionToken for the n't. (There is some special logic for n't.) There
> are some weird cases with n't with no preceding text. In my case it was some
> non-clinical text ("surf n'turf") but you can imagine typos as well (do n't).
> In these cases the preceding text is actually empty since it is the start of
> the token, and the code will create an empty WordToken, which can screw up
> downstream components (I noticed it in the parser). This can be fixed easily
> by checking for token length of 0 before creating the word token.
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