Modification of upload handling on multipart submissions also seems unnecessary

I have an action item:
http://lists.w3.org/Archives/Public/public-forms/2009Apr/att-0003/2009-04-01.html#ACTION1

Given the implementation requirements of upload, which associates 
knowledge of filename and mediatype with the URI of the file, it is not 
clear why it is necessary to make this change, esp. at this late date. 
Even if setvalue is used to change a node, it is either changed to another 
URI that has an associated filename and mediatype, or it isn't.

The submission serialization appears to be based on filename and mediatype 
associated with the URI.  These are also placed in data nodes indicated by 
the upload filename and mediatype elements, if specified, but it is the 
metadata associated with the URI at the time of submission that feeds the 
multipart serialization.  If the filename and mediatype data nodes have 
gotten out of synch, this is the problem of the form author who decided to 
do a setvalue on the node to which the upload is bound.

This is a more elaborated explanation of why I don't think we need to 
implement the following action item:
http://lists.w3.org/Archives/Public/public-forms/2009Apr/att-0010/2009-04-22.html#ACTION2

John M. Boyer, Ph.D.
STSM, Interactive Documents and Web 2.0 Applications
Chair, W3C Forms Working Group
Workplace, Portal and Collaboration Software
IBM Victoria Software Lab
E-Mail: boyerj@ca.ibm.com 

Blog: http://www.ibm.com/developerworks/blogs/page/JohnBoyer
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