what does “XMP over SOAP protocol” mean?

Question

what is the meaning of the following line ?

"The interfaces are built using XMP over SOAP protocol"

....the interfaces referes to webservices.

Answer 1

XMP stands for "Extensible Metadata Platform". It's a standard created by Adobe, and it lets you store metadata on documents that describe said documents.

SOAP is a method for transporting objects between different computers. It uses XML documents.

I suspect XMP on SOAP means that the SOAP XML documents use XMP to hold embedded metadata.