Does a PP Project have XMP data?

Hi all, can a Premiere Pro Project have XMP data?  I know clips can have data, but I want to store data globally for the project, not tied to a specific clip or bin.  I need to be able to blast all clips/bins from a project but still retain XMP data.

I found this thread but it wasn't much help:

Re: Storing data in Premiere Project

I saw in the DOM there's a "app.project.rootItem" which is of type ProjectItem.

I also saw the code in Premiere.jsx that reads/writes XMP data to ProjectItems and tried this on the root item, but with no luck.

Any help would be greatly appreciated.

TNKS!

G