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https://issues.apache.org/jira/browse/TIKA-2689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17351934#comment-17351934
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Tim Allison commented on TIKA-2689:
-----------------------------------

Are you willing to parse the PDF and then have the PDFParser update the 
mime-type?  It looks like there are some clear structural AI-based keys and 
also namespaces in the xmp.

> *.ai type (Adobe illustrator ) files are not detected correctly.
> ----------------------------------------------------------------
>
>                 Key: TIKA-2689
>                 URL: https://issues.apache.org/jira/browse/TIKA-2689
>             Project: Tika
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.16, 1.17, 1.18
>            Reporter: Amit Pandey
>            Priority: Major
>         Attachments: example.ai
>
>
> There is in-consistency in detecting **ai* types files when using different 
> overloaded detect method. When I am using _detect(String filename)_, it gives 
> correct file type - "*application/illustrator*". If I use _detect(InputStream 
> is, String filename)_ or _detect(File fileObj)_ -  it gives file type 
> "*application/pdf*".
> Here is sample code I used.
>   
> [https://stackoverflow.com/questions/51359351/tika-detect-method-not-giving-same-exact-file-type|http://example.com/]
>  



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