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https://issues.apache.org/jira/browse/TIKA-3721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17524718#comment-17524718
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Nick Burch commented on TIKA-3721:
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After a quick look, I can't spot any free tools or libraries for working with
these files. OpenDGN appears to not use our normal sense of open, and seems to
want an expensive SDK license
Did find a nice document on the DWG file format on the new OpenDGN site -
[https://www.opendesign.com/files/guestdownloads/OpenDesign_Specification_for_.dwg_files.pdf]
- but nothing for the DGN format there that I can find
If you're able to locate a tool or library, we can look at adding support.
Alternately if your company has licensed the SDK, it's fairly easy for you to
build your own custom Tika parser to wrap it, see
https://tika.apache.org/2.3.0/parser_guide.html
> DGN parser
> ----------
>
> Key: TIKA-3721
> URL: https://issues.apache.org/jira/browse/TIKA-3721
> Project: Tika
> Issue Type: New Feature
> Components: parser
> Affects Versions: 2.3.0
> Reporter: Dan Coldrick
> Priority: Minor
>
> Does anyone have any experience with the DGN file format by MicroStation? I
> see TIKA doesn't have a parser so would it be possible to create one?
> https://docs.fileformat.com/cad/dgn/
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