The dynamics of the UMDL service market society

Durfee, Edmund H.; Mullen, Tracy; Park, Sunju; Vidal, José M.; Weinstein, Peter

doi:10.1007/bfb0053675

Cited by 7 publications

(6 citation statements)

References 7 publications

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“…One inspiration for this approach was the University of Michigan Digital Library (UMDL) [7], which was a market in which automated agents would buy and sell information goods. The UMDL contained consumers with many different interests, and providers offering a wide set of different types of articles.…”

Section: Congregating In Information Economiesmentioning

confidence: 99%

Congregating and market formation

Brooks

Durfee

2002

Proceedings of the First International Joint Conference on Autonomous Agents and Multiagent Systems Part 1 - AAMAS '02

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Agents in a multiagent system are not typically entirely self-sufficient; instead, they frequently need to enlist other agents to perform tasks for them or to exchange goods or services with them. This creates a problem: how can an agent efficiently locate other agents to work or trade with? As the number of agents grows, the cost of this computation can become prohibitively large. One solution to this is for the system to self-organize into smaller groups of agents. In this paper, we apply the idea of congregating to a model of an information economy. We illustrate how participants in this economy can self-organize into a set of markets such that agents are able to find suitable partners while retaining low computational costs. We show how congregating can help allocation problems scale to large populations by allowing agents to interact locally.

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Section: Congregating In Information Economiesmentioning

confidence: 99%

Congregating and market formation

Brooks

Durfee

2002

Proceedings of the First International Joint Conference on Autonomous Agents and Multiagent Systems Part 1 - AAMAS '02

Self Cite

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“…Term semantics, however, are assumed to be shared. In the Service Markets Society of the University of Michigan Digital Library (Durfee, Mullen et al 1998), description logic is used to organize service descriptions in a subsumption taxonomy. This helps brokers reason in sophisticated ways to match requests, and leads to interesting system behavior.…”

Section: 1 Related Workmentioning

confidence: 99%

Agent Communication with Differentiated Ontologies: Eight New Measures of Description Compatibility

Weinstein¹,

Birmingham

1999

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We propose an approach to achieve appropriate exchange of services and data in distributed systems subject to semantic heterogeneity. We assume differentiated ontologies: that terms have formal definitions as concepts related to other concepts, that local concepts inherit from concepts that are shared, and that most or all primitives are shared. We then develop measures of description compatibility using the structure of the source and target definitions. We evaluate these measures by generating description-logic ontologies in artificial worlds. In our simulations, the "meaning" of a concept is its denotation in a finite universe of instances. The accuracy of the description-compatibility measures can thus be judged by their success in predicting the overlap of concept denotations. Description compatibility can be used to guide agent search for services across communities that subscribe to differentiated ontologies. Report Documentation Page Form Approved OMB No. 0704-0188Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.

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“…the intersection of superconcepts, 2. only roles with relations shared by all, and 3. filler value restrictions that are the intersection of role value restriction superconcepts. The UMDL's Service Markets Society (SMS) (Durfee et al 1998) is a computational economy. Agents buy and sell services within markets.…”

Section: Fig 11 Wrapper For 'Most Specific Subsuming'mentioning

confidence: 99%

“…Rather, we provide strong incentives for providers to describe their services ontologically as they become available. Our system, the University of Michigan Digital Library (UMDL) (Birmingham et al 1994), has a decentralized, agent-based architecture (Durfee et al 1998). A defining characteristic of this architecture is that agents form teams with other agents to solve problems.…”

Section: Introductionmentioning

confidence: 99%

Creating ontological metadata for digital library content and services

Weinstein¹,

Birmingham

1998

IJODL

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We use formal ontologies to represent knowledge about digital library content and services. Formal ontologies define concepts with logic in a frameinheritance structure. The expressiveness and precision of these structures supports computational reasoning that can be used in important ways. This paper focuses on the creation of ontological metadata.We create ontological content metadata by generating it from MARC (MAchine Readable Cataloging) data. MARC contains much information that is hard to exploit computationally. In particular, relationships between works are implicit in shared values and natural language notes. The conversion process involves specifying an ontological model, mapping MARC to the ontology, and reasoning about the data to create explicit links between works.Service metadata will be supplied by providers who wish to participate fully in a digital library that is implemented as a decentralized multi-agent system. Agents advertise by describing their services in terms of ontologically defined concepts. We reason about these descriptions to organize them into subsumption taxonomies. Agents can then find the best available services to meet their needs by describing their needs, without requiring a priori knowledge of other agents. This infrastructure has demonstrated its usefulness in a multi-agent system organized as a computational economy.

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The dynamics of the UMDL service market society

Cited by 7 publications

References 7 publications

Congregating and market formation

Congregating and market formation

Agent Communication with Differentiated Ontologies: Eight New Measures of Description Compatibility

Creating ontological metadata for digital library content and services

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