FIPA CFP Communicative Act Specification


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FIPA CFP Communicative Act Specification

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Date of this status





Change history


Deprecated by FIPA00037


Line numbering added











2000 Foundation for Intelligent Physical Agents -

Geneva, Switzerland


Use of the technologies described in this specification may infringe patents, copyrights or other intellectual property rights of FIPA Members and non-members. Nothing in this specification should be construed as granting permission to use any of the technologies described. Anyone planning to make use of technology covered by the intellectual property rights of others should first obtain permission from the holder(s) of the rights. FIPA strongly encourages anyone implementing any part of this specification to determine first whether part(s) sought to be implemented are covered by the intellectual property of others, and, if so, to obtain appropriate licenses or other permission from the holder(s) of such intellectual property prior to implementation. This specification is subject to change without notice. Neither FIPA nor any of its Members accept any responsibility whatsoever for damages or liability, direct or consequential, which may result from the use of this specification.


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1 Scope. 1

2 Call for Proposal2

3 References. 3

1         Scope

This document specifies the Call for Proposal (CFP) communicative act that is compliant to [FIPA00037] requirements.



2         Call for Proposal


The action of calling for proposals to perform a given action.


A tuple containing an action expression denoting the action to be done and a proposition denoting the preconditions on the action.


CFP is a general-purpose action to initiate a negotiation process by making a call for proposals to perform the given action. The actual protocol under which the negotiation process is established is known either by prior agreement, or is explicitly stated in the :protocol parameter of the message.


In normal usage, the agent responding to a cfp should answer with a proposition giving its conditions on the performance of the action. The responder's conditions should be compatible with the conditions originally contained in the cfp. For example, the cfp might seek proposals for a journey from Frankfurt to Munich, with a condition that the mode of travel is by train. A compatible proposal in reply would be for the 10.45 express train. An incompatible proposal would be to travel by airplane.


Note that cfp can also be used to simply check the availability of an agent to perform some action.

Formal Model

<i, cfp( j, <j, act>, f(x) )>
<i, query-ref(j,
ix (Ii Done(<j, act>, f(x))
j Done(<j, act>, f(x))))>
Brefi(ix a(x)) Urefi(ix a(x))
Bi Ij Done(<j, Inform-ref(i, ix a(x))>)
RE: Done(<j, Inform(i,
ix a(x) = r1)>| |<j,
ix a(x) = rk)>)




a(x) = Ii Done(<j, act>, f(x)) Ij Done(<j, act>, f(x))


Agent i asks agent j: "What is the 'x' such that you will perform action 'act' when 'f (x)' holds?"


Agent j asks i to submit its proposal to sell 50 boxes of plums: 

:sender j

:receiver i


((action i

(sell plum 50))


:ontology fruit-market)

3         References

[FIPA00037] FIPA Communicative Act Library Specification. Foundation for Intelligent Physical Agents, 2000.