An XML-based document format from Microsoft. Providing full page layout capabilities, XML Paper Specification (XPS) also allows digital signatures and digital rights to be applied to the documents.
Like it has done with its Open XML specification, Microsoft is pushing its XML Paper Specification (XPS) alternative to PDF through the standards bodies. And just like the case with Open XML, ...
Add or Remove Programs entry for XML Paper Specification Shared Components Pack 1.0. XML Paper Specification or XPS is Microsoft's standard format for portable documents, similar to the PDF format.