Knowledge Query and Manipulation Language (KQML) is another proposed standard.
The most popular ACLs are: Both rely on speech act theory developed by Searle in the 1960s[3] and enhanced by Winograd and Flores in the 1970s.
They define a set of performatives, also called Communicative Acts, and their meaning (e.g. ask-one).
To make agents understand each other they have to not only speak the same language, but also have a common ontology.
Examples of frameworks that implement a standard agent communication language (FIPA-ACL) include FIPA-OS[4][5] and Jade.