FIPA Inform If Communicative Act Specification


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FIPA Inform If Communicative Act Specification

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Date of this status





Change history


Deprecated by FIPA00037












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 Inform If 2

3 References. 3

1         Scope

This document specifies the Inform If communicative act which is compliant to [FIPA00037] requirements.



2         Inform If


A macro action for the agent of the action to inform the recipient whether or not a proposition is true.


A proposition.


The inform-if macro act is an abbreviation for informing whether or not a given proposition is believed. The agent which enacts an inform-if macro-act will actually perform a standard inform act (see [FIPA00046]). The content of the inform act will depend on the informing agent's beliefs. To inform-if on some closed proposition f:


       if the agent believes the proposition, it will inform the other agent that f, and,


       if it believes the negation of the proposition, it informs that f is false (i.e. f).


Under other circumstances, it may not be possible for the agent to perform this plan. For example, if it has no knowledge of f, or will not permit the other party to know (that it believes) f, it will send a refuse message (see [FIPA00055]).

Formal Model

<i, inform-if(j, f)>

<i, inform(j, f)>|<i, inform(j, f)>

FP: Bifi f Bi (Bifj f Uifj f)

RE: Bifj f


Inform-if represents two possible courses of action: i informs j that f, or i informs j that not f.


Agent i requests j to inform it whether Lannion is in Normandy.


:sender i
:receiver j

:sender j
:receiver i
"in( lannion, normandy )"
:language Prolog)
:language FIPA-SL)


Agent j replies that it is not:



:sender j

:receiver i


"\+ in( lannion, normandy )"

:language Prolog)

3         References

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

[FIPA00046] FIPA Inform Communicative Act Specification. Foundation for Intelligent Physical Agents, 2000.

[FIPA00055] FIPA Refuse Communicative Act Specification. Foundation for Intelligent Physical Agents, 2000.