In October 1999 RFCs 2720-2724 were published, specifying the RTFM Traffic Measurement Architecture. Since then many sites have been using the NeTraMet implementation for production traffic data collection, and others have used it as the basis of further developments in the field of network traffic measurement. From this development work a need has arisen to extend the RTFM Architecture, so as to: a) Develop a high-level interface to RTFM, so as to make RTFM capabilities easily and directly accessible to new application programs. b) Standardise the 'new attributes' described in RFC 2724. c) Add further attribute types, and attributes which use them. Supporting material for these needs has been published as Internet Drafts (see below). The BOF will discuss issues raised by the Drafts, determine what work needs to be done, and establish a timeframe for it. The need for a new RTFM Working Group will be considered, and a charter for such a group discussed.