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From bugzi...@apache.org
Subject [Bug 59268] Work on providing an updated version of XMLBeans
Date Tue, 12 Dec 2017 17:07:55 GMT
https://bz.apache.org/bugzilla/show_bug.cgi?id=59268

--- Comment #24 from Greg Woolsey <gwoolsey@apache.org> ---
Another complication is that none of the replacement technologies that have
been discussed so far can handle the arbitrary XML allowed as "extensions" in
the OOXML spec. One benefit of XMLBeans is that it keeps the raw XML around and
returns any properties/attributes present when asked.  That way POI can "pass
through" unknown content while allowing access to all known content in a file. 
This is used quite often by downstream projects, especially ones that start
with custom "template" files containing bits like OLE components, custom Office
extensions, VBA macros, complex pivot tables, etc. and fill in live data on the
fly.  

In the spec this is handled by referencing additional namespaces on the fly by
URL. Any replacement in POI would need to allow similar retention of unknown
XML elements and content.  This completely breaks systems like JAXB, which
needs all possible namespaces and how they fit together to be defined up front.
 There is no dynamic model building or class loading.

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