XML is a great technology, and now incorporated into new interactive PDF’s.
“Adobe Systems is teaching PDF documents how to speak XML to provide ties to enterprise systems.
The San Jose, Calif., company is working on a new version of its Form Designer product that will allow companies to include XML schemas when creating forms. These forms can be distributed in PDF or XDP (XML Data Package) format. Once filled in, they can be processed as a PDF or as XML, Adobe said” [InfoWorld]