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XML Diff and Sync
- From: Joel Bender <email@example.com>
- To: firstname.lastname@example.org
- Date: Wed, 18 Apr 2001 11:48:47 -0400
I have a collection of applications that share an XML file. When one
application changes some piece of the file, i.e., an attribute value
changes or an element is added/replaced/deleted, a notification of
the change will be sent to the other peers. Sending a new copy of
the entire file will not satisfy my performance requirements.
I've been poking around in the XML Fragment Interchange working draft
, but it seems pretty verbose for deeply nested elements. It also
references XPointer, but the fragment package definition makes my
eyes gloss over and for some reason the text gets blurry :-). I
guess I was expecting something that used XPath.
If there was a tool that explained the differences between two XML
files as a series of delta expressions, that would be a great start.
<addElement path="a/b"><c>Some content</c></addElement>
Once these tiny delta elements are defined, they'll be useful in all
kinds of ways. I could save them as an audit log stored in an XML
database, buffer a sequence of them up for applications that have
been out of touch for a while, keep a stack of them for undo
Hints? Tips? Tricks?