\section{Terminology and Conventions}
\label{sec:terminology}

This memo makes use of the vocabulary defined in the IMPP Model document
\citenorm{rfc2778}.  Terms such as CLOSED, INSTANT MESSAGE, OPEN,
PRESENCE SERVICE, PRESENTITY, WATCHER, and WATCHER USER AGENT in the
memo are used in the same meaning as defined therein.  The key words
{\MUST}, {\MUST NOT}, {\REQUIRED}, {\SHOULD}, {\SHOULD NOT},
{\RECOMMENDED}, {\MAY}, and {\OPTIONAL} in this document are to be
interpreted as described in BCP XX, RFC 2119 \citenorm{rfc2119}.

