By Joao Leite, Andrea Omicini, Leon Sterling, Paolo Torroni

The turning out to be complexity of agent platforms demands types and applied sciences that permit for method predictability and permit characteristic discovery and verification. Formal tools and declarative applied sciences have lately attracted a turning out to be curiosity as a method for facing such matters.

This ebook provides revised and prolonged types of eleven papers chosen for presentation on the First foreign Workshop on Declarative Agent Languages and applied sciences, DALT 2003, held in Melbourne, Australia in July 2003 in the course of AAMAS; additionally integrated are three invited papers via major researchers within the sector to make sure powerfuble insurance of all appropriate topics.

The papers are geared up in topical sections on
- software program engineering and MAS prototyping
- agent reasoning, BDI logics, and extensions
- social points of multi-agent systems

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Extra resources for Declarative Agent Languages and Technologies: First International Workshop, DALT 2003, Melbourne, Australia, July 15, 2003, Revised Selected and Invited Papers

Example text

Section 3 is devoted to describing the basic framework of labeled transition systems [1], which is exploited in this paper to formalize the behavior of agents and of their conceptual subparts. Section 4 describes our novel approach to agent modeling. This is based on the idea of considering a partial specification of an agent behavior – namely, a grey-box model abstracting away from the agent inner details below a certain abstraction threshold [2] –, which can be refined by the specification of a completion.

4 Grey-Box and Refinement In [4], the rationale behind the grey-box modeling approach for agents is introduced. Its key idea is to represent an agent behavior by focusing on its part dealing with the interactions with the environment, called the (agent) core, while abstracting away from the complex inner details, namely, from the (agent) internal machinery. Clearly, deciding which aspects should be specified in the core Operational Semantics for Agents by Iterated Refinement 41 and which should be abstracted away depends on the abstraction level of interest.

The user can also express a condition of the form: The past event will be removed at the specified time. Alternatively, one can specify the terminating condition. e. the corresponding goal is proved) the event is removed. In particular cases, an event should never be dropped from the knowledge base, like in the example below: Implicitly, if a second version of the same past event arrives, with a more recent timestamp, the “older” event is overridden, unless this violates a directive. It is interesting to notice that DALI management of past events allows the programmer to easily define Event Calculus expressions.

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