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https://issues.apache.org/jira/browse/TIKA-879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14257918#comment-14257918
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Hudson commented on TIKA-879:
-----------------------------

UNSTABLE: Integrated in tika-trunk-jdk1.7 #387 (See 
[https://builds.apache.org/job/tika-trunk-jdk1.7/387/])
TIKA-879 Add a new parent mime type, for the text based message formats, of 
text/x-tika-text-based-message, which allows Thunderbird messages to be 
correctly detected as they now show up as being text based not binary based in 
the hierarchy (nick: 
http://svn.apache.org/viewvc/tika/trunk/?view=rev&rev=1647721)
* 
/tika/trunk/tika-core/src/main/resources/org/apache/tika/mime/tika-mimetypes.xml
* /tika/trunk/tika-parsers/src/test/java/org/apache/tika/mime/TestMimeTypes.java


> Detection problem: message/rfc822 file is detected as text/plain.
> -----------------------------------------------------------------
>
>                 Key: TIKA-879
>                 URL: https://issues.apache.org/jira/browse/TIKA-879
>             Project: Tika
>          Issue Type: Bug
>          Components: metadata, mime
>    Affects Versions: 1.0, 1.1, 1.2
>         Environment: linux 3.2.9
> oracle jdk7, openjdk7, sun jdk6
>            Reporter: Konstantin Gribov
>         Attachments: TIKA-879-thunderbird.eml
>
>
> When using {{DefaultDetector}} mime type for {{.eml}} files is different (you 
> can test it on {{testRFC822}} and {{testRFC822_base64}} in 
> {{tika-parsers/src/test/resources/test-documents/}}).
> Main reason for such behavior is that only magic detector is really works for 
> such files. Even if you set {{CONTENT_TYPE}} in metadata or some {{.eml}} 
> file name in {{RESOURCE_NAME_KEY}}.
> As I found {{MediaTypeRegistry.isSpecializationOf("message/rfc822", 
> "text/plain")}} returns {{false}}, so detection by {{MimeTypes.detect(...)}} 
> works only by magic.



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