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https://issues.apache.org/jira/browse/TIKA-1963?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15265457#comment-15265457
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Nick Burch commented on TIKA-1963:
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We try to document the configuration settings properly! 
http://tika.apache.org/1.12/configuring.html is the latest, if things aren't 
clear then please let us know what to expand!

Part of your problem may be that, in Tika terms, you can't OCR a PDF. All you 
can do is OCR the images embedded in a PDF

> Configuring Parsers: "high degree of control over which parsers are or aren't 
> used" does not work
> -------------------------------------------------------------------------------------------------
>
>                 Key: TIKA-1963
>                 URL: https://issues.apache.org/jira/browse/TIKA-1963
>             Project: Tika
>          Issue Type: Bug
>          Components: config
>    Affects Versions: 1.12
>         Environment: windows, java version "1.8.0_73", 64 bit
>            Reporter: Konstantin Avdeev
>
> Hi everybody!
> I'm trying to white-list a particular mime-type for OCR with the following 
> config:
> {code}
> <properties>
>   <parsers>
>     <parser class="org.apache.tika.parser.DefaultParser">
>       <mime-exclude>application/pdf</mime-exclude>
>       <parser-exclude class="org.apache.tika.parser.ocr.TesseractOCRParser"/>
>     </parser>
>     <parser class="org.apache.tika.parser.pdf.PDFParser">
>       <mime>application/pdf</mime>
>     </parser>
>   </parsers>
> </properties>
> {code}
> So, the idea is - to enable the Tesseract parser for PDF format only.
> But this configuration disables the Tesseract completely.
> Is it the expected behaviour or a bug?
> Thank you!



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