Linked file info in XMP: what was the earliest Illustrator version to include it?

[leo.r]

Hi all,

I wonder if anyone knows what was the first version of Illustrator that started to include linked file info in the document XMP?

That is such entries as:

<stMfs:linkForm>

<stRef:filePath>

Must be for quite some time now (at least since CS4?)

This would help distinguish between documents that don't have any links versus older documents  which just didn't include this info yet.

Thanks,

Leo