Information Technology Reference
In-Depth Information
ACL Message
( inform
:sender agent1
:receiver hpl-auction-server
:content
(price (bid good02) 150)
:in-reply-to round-4
:reply-with bid04
:language sl
:ontology hpl-auction
)
Begin nin g
Message content
Co mmunicati ve act type
Perameters
Message para meter
Figure 14.9. Message Structure
In transmission, messages are represented as s-form. The first element of
message determines the communication act and main meaning of the message.
Followed are message keyword parameters by a colon to guide, no space
between the colon keyword parameters. One parameter contains message content
using some form of coding. Other parameters are used to help messaging services
to correctly transmit information (such as the sender, receiver), or to help the
recipient to explain implications of information (such as language, ontology), or
help the receiver to reply more cooperatively (such as reply-with, reply-by).
The transmission form is the serial bit stream transferred by messaging
service. The receiver agent is responsible for bit stream decoder, decoding
elements of messages and correctly handles it.
Communication act of message is corresponding to performative in KQML.
3. Message Parameter
As mentioned earlier, message includes a group of one or more parameters.
These parameters in the message can be any chronological order. Only one of the
parameters: receiver is indispensible with which such messaging service can
correctly transmit message. Obviously, the message is useless if it has not the
recipient of the message. However, parameters for effective communication are
different under different circumstances.
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