XMP changes in CS4- history now?

[teddillard]

A friend who uses Lightroom mentioned that LR now has "history tags" as he put it.  Peeping at the XMP stuff in Smart Object files you now see XMP.did (document id) and XMP.iid (instance id) instead of the uuid (unique whatever...  ) in CS3 files.  Also you see a history reference.  

What does this all mean?  Is this just a new better way to handle the metadata, or does this imply we're going to see some history saved with the raw files in the near future?

[attachment=9278:Picture_6.png]

[Schewe]

The XAP properties are what used to be called the PDF schema...that's where the creation app and unique app ID are stored as well as a few other things.

[teddillard]

The XAP properties are what used to be called the PDF schema...that's where the creation app and unique app ID are stored as well as a few other things.

...so you're thinking it doesn't have much bearing on what we can do to the files really?  ("we" being photographers, not programmers...  heh)