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https://issues.apache.org/jira/browse/LUCENE-5734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14019271#comment-14019271
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David Smiley commented on LUCENE-5734:
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Simply re-stating my expectation of how it should work from IRC:
My expectation is that the startOffset and endOffset of a token should be
directly adjacent to the token text in the original text. This is the case for
startOffset, but with HTMLStripCharFilter (and maybe others?) endOffset isn't;
it follows elided (stripped) characters.
I don't think there's a rule it should be any which way, but I claim it should
work this way -- FWIW I think it's intuitive. Never mind what I said about it
being sensitive to an inner opening tag; I can live without that complication.
> HTMLStripCharFilter end offset should be left of closing tags
> -------------------------------------------------------------
>
> Key: LUCENE-5734
> URL: https://issues.apache.org/jira/browse/LUCENE-5734
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/analysis
> Reporter: David Smiley
> Priority: Minor
>
> Consider this simple input:
> {noformat}
> <em>hello</em>
> {noformat}
> to be analyzed by HTMLStripCharFilter and WhitespaceTokenizer.
> You get back one token for "hello". Good. The start offset of this token is
> at the position of 'h' -- good. But the end offset is surprisingly plus one
> to the adjacent </em>. I argue that it should be plus one to the last
> character of the token (following 'o').
> FYI it behaves as I expect if after hello is an XML entity such as in this
> example: {noformat}hello {noformat} The end offset immediately follows
> the 'o'.
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