Knowledge Query and Manipulation Language

KQML is a language for communications. It is also part of the KSE.
Each message starts with a performative and has a number of parameters. It looks like:(ask-one :content (PRICE IBM ?price) :receiver stock-server :language LPROLOG :ontology NYSE-TICKS)

Parameter	Meaning
`:content`	content of the message
`:force`	wether the sender of the message will ever deny the content of the message
`:reply-with`	whether the sender expects a reply and, if so, an identifier for the reply
`:in-reply-to`	reference to the `:reply-with` parameter
`:sender`	sender of the message
`:receiver`	intended recipient of the message
`:language`	language of the content
`:ontology`	ontology of the content