Is it possible to save blobs to XMP?

[amtopel]

Is it possible to save blobs to XMP? Or do you have to use Base64 or something like that?

[ceztko]

Not being able to save unencode binary blobs it's a limitation by design in XML and XMP can't to anything about it. The XMP specification itself defines xmpGImg:image which is a b64 encoded blob.