Meta Analysis and Tracing Engine (MATE)
MATE is not a protocol, is a tool that allows to create user configurable extension(s) of the display filter engine.
MATE is described in the MATE's wiki page.
As of 0.10.9 MATE is functional, although it is still in a prototype stage, non the less it can be used. There are known problems in MATE's reinitialization (most will be fixed before the next release), that means that most often you'll need to restart wireshark instead of loading a new capture file.
the only preference setting that MATE has is mate.config_filename which tells mate from wich file it has to load as it's configuration.
For a detailed description on what Pdu, Gop (Group of Pdus) and Gog (Group of Groups) are please take a look to Mate's Manual
mate.pdu_name: an integer containing the id of the Pdu
mate.pdu_name.RelativeTime: a float representing the number of seconds passed since beginig of capture
mate.pdu_name.TimeInGop: a float representing the time of this Pdu relatively to it's Gop start
mate.pdu_name.pdu_attrib: a string containing some data element extracted fom the frame
mate.gop_name : an integer containing the id of the Pdu
mate.gop_name.StartTime: the number of seeconds passed since beginig of capture to the creation of this Gop
mate.gop_name.Time: the time passed between the GopStart and the GopStop
mate.gop_name.Duration: the time passed between the GopStart and the last Pdu assigned to this Gop
mate.gop_name.NumOfPdus: the number of Pdus that have being assigned to the Gop
mate.gop_name.Pdu: depending on the ShowPduTree setting this might be either the framenumber or the id of a Pdu assigned to this Gop
mate.gop_name.gop_attrib: a string containing an attribute of the Gop's AVPL
mate.gog_name: the id of a Gog
mate.gog_name.StartTime: the number of seconds passed since beginig of capture to the creation of this Gog
mate.gog_name.NumOfGops: the number of Gops that have being assigned to the Gog
mate.gog_name.Duration: the number of seconds passed from the creation of the Gog to the last Pdu assigned to one of its Gops
mate.gog_name.Gop: the id of a Gop that belongs to this Gog
mate.gog_name.gog_attrib: a string containing an attribute of the Gop's AVPL
You cannot directly filter MATE while capturing. MATE builds its tree based on information imported from other protocols.