how to tag a field from sourcetype in Missile Map ?
You need to do in two files (eventtypes.conf & tags.conf) . In your own app (or the local directory of the Missile Map app) create those two files
=> In eventtypes.conf, group all the events which are same
search = sourcetype="whatever_your_missle_map_sourcetype" someField=someKey
=> In tags.conf, put the eventtypes and tag all of them
authentication = enabled
user = enabled