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From "Jukka Zitting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (TIKA-379) Html elements and attributes not available in XHTML representation
Date Wed, 14 Apr 2010 11:10:50 GMT

    [ https://issues.apache.org/jira/browse/TIKA-379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12856839#action_12856839
] 

Jukka Zitting commented on TIKA-379:
------------------------------------

The reason for the default HTML mapping rules in Tika are to simplify and normalize the input
documents so that client applications could easily process all sorts of input (HTML or not)
without needing type- or source-specific heuristics. The basic idea has been that clients
should directly use the underlying parser libraries when it needs custom processing of specific
content types.

That said, I see the value of being able to process even complex HTML input through the Tika
API, and perhaps the above original intent is too strict for many use cases. The HtmlMapper
interface we added for TIKA-347 should make it possible to relax the mapping rules, and in
revision 933909 I added a IdentityHtmlMapper implementation of this interface to make it even
easier to use:

    ParseContext context = new ParseContext();
    context.set(HtmlMapper.class, IdentityHtmlMapper.INSTANCE);

Note that IdentityHtmlMapper breaks the guarantee that the Tika output is valid XHTML. Also,
currently the HtmlMapper interface only covers elements, so all attributes are still lost
and IdentityHtmlMapper overrides the custom <a/> tag handling in HtmlHandler so even
the href attributes are gone. It would be good if we could extend the HtmlMapper mechanism
to avoid these problems.

> Html elements and attributes not available in XHTML representation 
> -------------------------------------------------------------------
>
>                 Key: TIKA-379
>                 URL: https://issues.apache.org/jira/browse/TIKA-379
>             Project: Tika
>          Issue Type: Bug
>          Components: parser
>    Affects Versions: 0.7
>            Reporter: Julien Nioche
>            Priority: Critical
>
> The following HTML document :
> <html lang="fi"><head>document 1 title</head><body>jotain suomeksi</body></html>
> is rendered as the following xhtml by Tika :
> <?xml version="1.0" encoding="UTF-8"?><html xmlns="http://www.w3.org/1999/xhtml"><head><title/></head><body>document
1 titlejotain suomeksi</body></html>
> with the lang attribute getting lost. The lang is not stored in the metadata either.

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