Base64 encoding of attached files

[MattO]

I've noticed that when InfoPath base64 encodes a file to inline it into the XML of a form, it prepends some extra binary data to the attached document. If I'm correct in this assertion, I presume it is data for InfoPath to use internally when showing things like the file name of the attached file when the form is open. However, we're extracting the base64 encoded data from the xml outside of InfoPath and decoding it in the hopes to have the binary content of the original attached file (and only the attached file). Are there some specifications somewhere for exactly what InfoPath puts in the inlined base64 data?

Thanks
Matt

 

[Andrew Ma [MSFT]]

There's a blog entry about the file attachment format in our team blog:
http://blogs.msdn.com/infopath/archive/2004/03/18/92221.aspx

--
Andrew J. Ma
Software Test Engineer
Microsoft Office InfoPath
http://blogs.msdn.com/ajma
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