[Libreoffice-bugs] [Bug 119087] FILESAVE PPTX: PowerPoint wants to repair the file after roundtrip and cannot open it

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=119087

--- Comment #8 from Aron Budea <baron at caesar.elte.hu> ---
The source of this bug is that when the code is checking for custom XMLs, it
checks the content of "xmlns" attributes, and if they're not
"http://schemas.openxmlformats.org", they're treated as a custom XML, and the
content is supposed to be preserved. This doesn't go well when the XML is also
part of the file format.

In this PPTX file those attributes have this prefix instead:
"http://purl.oclc.org/ooxml/drawingml/main" (purl.oclc.org is a URL shortener)

I assume XMLs that have override entries in "[Content_Types].xml" should never
be treated as possible custom XMLs.

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