An SCP Project
This is a collection of texts, the alphabet used in them,
a notation for references, and the vocabulary used by the
author. You create an SCP project and save it in a file with
an extension of .scp to identify it as an SCP project. You
can have many projects which use the same collection of
texts but differ only in the scanning rules. The .scp project
file is written in the eXtensible Markup Language (XML).