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https://issues.apache.org/jira/browse/UIMA-167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12463251
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Marshall Schor commented on UIMA-167:
-------------------------------------

Found this on the Docbook FAQ:

http://www.dpawson.co.uk/docbook/reference.html#d17e1969

> Do the stylesheets and DTDs fall under any licenses?

They're 100% free software, meeting all the terms of the GNU Free Software 
Definition, the Debian Free Software Guidelines, the Open Source Definition -- 
meaning you're free to use them for any purpose, modify them in any way you 
want, and distribute your modified versions, without restriction and without 
needing to ask anybody for permission.

As far as specific licenses, the wording of the license distributed with the 
stylesheets is pretty much the same as the MIT/X Consortium license.

I'm not sure whether the language of the license distributed with the DTD is 
based on any existing license, but it seems like a shortened version of the 
MIT/X Consortium license, without the advertising clause. Regardless, it's 
definitely a 100% free software license.


> How about copyrights?  Does anyone hold copyrights on any portion of
> DocBook?

Both the stylesheets and DTD are copyrighted. But that's a good thing, not a 
bad thing. It just ensures that anybody who redistributes modified versions has 
to do it under the terms of the same 100% free-software license the copyright 
holders chose, so it all stays free.

> Find and verify Docbook license(s)
> ----------------------------------
>
>                 Key: UIMA-167
>                 URL: https://issues.apache.org/jira/browse/UIMA-167
>             Project: UIMA
>          Issue Type: Task
>          Components: Build, Packaging and Test
>    Affects Versions: 2.1
>            Reporter: Marshall Schor
>
> I did a quick check and couldn't find the license info for Docbook xsl (on 
> sourceforge) and Docbook XML (from OASIS).  Need to find these and confirm we 
> can "distribute", or delete from our distribution.

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