XProc is a language designed for describing operations to be performed on XML documents. The official specification for XProc is XProc: An XML Pipeline Language. It is currently a Candidate Recommendation Working Draft. The XProc specification is produced by the XML Processing Model Working Group. The XProc WG operates in the public, anyone is free to read the archives of its mailing list. Public comments on the specification may be sent to the processing model comments mailing list. The archives of the comments list are also open to the public.