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https://issues.apache.org/jira/browse/LUCENE-5763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14031891#comment-14031891
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Steve Rowe edited comment on LUCENE-5763 at 6/15/14 2:00 PM:
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Apparently the HTML5 named character entity set is almost a superset of 
HTML4's, but not quite: {{⟨}} and {{⟩}} expand to different 
characters.  I don't think this blocks switching, just something that needs to 
be documented.  Some background here: 
https://www.w3.org/Bugs/Public/show_bug.cgi?id=14429


was (Author: steve_rowe):
Apparently the HTML5 named character entity set is almost a superset of 
HTML4's, but not quite: {{⟨}} and {{⟩}} expand to different 
characters.  I don't think this blocks switching, just something that needs to 
be documented.  Some background here: 
https://www.w3.org/Bugs/Public/show_bug.cgi?id=14429

> HTMLStripCharFilter += HTML5 
> -----------------------------
>
>                 Key: LUCENE-5763
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5763
>             Project: Lucene - Core
>          Issue Type: Task
>          Components: modules/analysis
>            Reporter: Steve Rowe
>            Priority: Minor
>
> HTMLStripCharFilter knows some specific things about HTML4 (like named 
> character entities, which are converted to the corresponding characters), but 
> not about HTML5.
> HTML5 has way more named character entities: 2,231 vs 259 by my count.
> There's probably other stuff to do, e.g. there are new tags.



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