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Also known as: Xref
A header added by a server listing the group and article-number pairs a crossposted article occupies on that particular machine, such as comp.misc:4123 alt.test:9981. Newsreaders read it to mark a crosspost read in every group at once instead of showing it repeatedly. The numbers are local to the server that wrote the line and mean nothing at all on any other server.
Browse all terms in Core Usenet Concepts, or see the full Usenet glossary.