Please assist, What information do we hash in the xform,
i.e md5:b2b43e2b439d7181dfeb9edc540c25f6, do we md5 file name or what information? and in which format ?,am asking this because every time on ODK Collect get blank form says "This is an update to a form you have", while there is no change in md5 hash from new form and the previous downloaded form.
Yes it's a hash of the entire content of such a form.
We compare that hash with the value provided by the server. When hashes are different the mentioned message is displayed.
Local server... you mean aggregate?