FOUNDATION FOR INTELLIGENT PHYSICAL AGENTS

 

 

FIPA Subscribe Communicative Act Specification

 

 

 

 

 

 

 

 

 

 

 

© 2000 Foundation for Intelligent Physical Agents - http://www.fipa.org/

Geneva, Switzerland

Notice

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.

Foreword

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Contents

1     Scope. 3

2     Subscribe. 3

3     References. 3

1         Scope

This document specifies the Subscribe communicative act that is compliant to [FIPA00037] requirements.

 

2         Subscribe

Summary	The act of requesting a persistent intention to notify the sender of the value of a reference, and to notify again whenever the object identified by the reference changes.
Content	A descriptor (a referential expression).
Description	The subscribe act is a persistent version of the query-ref act (see [FIPA00054]), such that the agent receiving the subscribe will inform (see [FIPA00046]) the sender of the value of the reference, and will continue to send further informs if the object denoted by the description changes.
Formal Model	<i, subscribe(j, Ref x d(x))> º   <i, request-whenever(j, <j, inform-ref(i, Ref x d(x))>,                       ($y) Bj ((Ref x d(x) = y))>     FP: BiaÙØBi (BifjaÚ Uifja)     RE: Bja   Where:     a= Ii Done(<j, inform-ref(i, Ref x d(x))>,             ($e) Enables(e, ($y) Bj ((Ref x d(x) = y)))   Note: Ref xd(x) is one of the referential expressions: ixd(x), any xd(x) or all xd(x).
Example	Agent i wishes to be updated on the exchange rate of Francs to Dollars, and makes a subscription agreement with j (an exchange rate server).   (subscribe   :sender i   :receiver j   :content     (iota ?x       (= ?x (xch-rate FFr USD))))

                                                            

3         References

[FIPA00037]      FIPA Communicative Act Library Specification. Foundation for Intelligent Physical Agents, 2000. http://www.fipa.org/specs/fipa00037/

[FIPA00046]      FIPA Inform Communicative Act Specification. Foundation for Intelligent Physical Agents, 2000. http://www.fipa.org/specs/fipa00046/

[FIPA00054]      FIPA Query Ref Communicative Act Specification. Foundation for Intelligent Physical Agents, 2000. http://www.fipa.org/specs/fipa00054/