DAML PI Meeting Status Briefing DAML PI Meeting Status Briefing UMBC, JHU APL, MIT Sloan UMBC, JHU APL, MIT Sloan Tim Finin Jim Mayfield Benjamin Grosof February 12, 2002 tell register JHU APL Haircut retrieval system Communicating Agents XTalks Application testbed
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DAML PI Meeting Status Briefing UMBC, JHU APL, MIT Sloan Tim Finin Jim Mayfield Benjamin Grosof February 12, 2002 tell register JHU APL Haircut retrieval.
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DAML PI Meeting Status BriefingDAML PI Meeting Status Briefing
UMBC, JHU APL, MIT SloanUMBC, JHU APL, MIT Sloan
Tim FininJim Mayfield
Benjamin Grosof
February 12, 2002tell
register
JHU APL Haircutretrieval systemCommunicating
AgentsXTalks Application testbed
AccomplishmentsAccomplishments
ITTALKS => XTalks as integrated applications using agent mediated services to disseminate event announcements DAML+OIL as an agent communication language allows intelligent agents
accept DAML+OIL event notifications and enter on user’s calendar if they match interests, location & schedule.
DAML+OIL ontology to represent distributed trust and belief
Retrieval Retrieval using text, DAML+OIL, and RDF triples
Implemented retrieval-based ontology mapping (not yet enough DAML/text for general applicability)
Implemented SOAP-based retrieval and term relationship services
Preliminary representation of RuleML in DAML
Implemented DAMLATOR Apache module as an efficient, convenient translation engine for DAML+OIL
accomplishments
XTalks XTalks
• XTalks supports database driven website of talks and related. The database contains information on
– Seminar events
– People (speakers, hosts, users,…)
– Places (rooms, institutions,…)
– Topics (defined by DAML+OIL ontology)
– User’s interests, schedules and locations
• This database is used to dynamically generate web pages and DAML+OIL descriptions for the talks and related events.
• Notifications are sent to registered users and/or their agents via email, SMS, WAP, and/or an ACL (e.g., KQML, FIPA) for events matching their interests, location and schedule.
• XTalks 1.0 available by CD orhttp://daml.umbc.edu/download/
http://ittalks.org/
accomplishments
accomplishments
XSBDAML+OIL
Reasoner
ITTALKSagent
Travelagent
Calendaragent
Useragent
BrokerAgent
AgentNameServer
user’s daml profile
mapquest
MS Outlook
ITTALKS app
DAML reasonerCommon agent infrastructure
FIPA ACL
API
Communicationprotocol
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Distributed TrustDistributed Trust
Delegation based model for distributedauthorization and trust for use in bothwired and wireless scenarios. Focus on trust from security perspective
Building on concepts like authentication,authorization, role-based access control,public key infrastructure, digital signatures,authoritative sources of information, etc.
Agents make speech acts aboutand reason over these propertiesand relations. Grounded in an ontology represented in DAML+OIL
Trust/security policies defined in DAML+OIL and by rules (in RuleML) Requests for actions made by and to agents evaluated
Allows users to create mappings between two ontologies which have URIs to text associated with classes and properties.
Automates mapping process, taking into account hierarchical relationships and user-specified landmark mappings.
Uses text classification to compute similarities between pairs of classes or properties.
Used in XTalks to enable mappings betweenAlternative topic ontologies in DAML+OIL
accomplishments
DAML and Text RetrievalDAML and Text Retrieval
HAIRCUT retrieval engine augmented to usetext, DAML, and RDF triples as indexing/query terms
Demonstrated retrieval-based ontology mapping find text that characterizes DAML tag, then find other DAML tags
with similar characterizations
Not yet enough DAML/text available for general applicability of this technique
SOAP query services over DAML crawler data available
http://www.daml.org:2020/soap/servlet/rpcrouter/
Services are affines (find related terms), lookup (search for documents)
Damlator translation engineDamlator translation engine Extensible engine for DAML-encoded
Semantic Web pages translation and caching Currently supported output formats:
For humans: GIF and PNG For agents: DAML, NTriples, Prolog terms
Caching supports scalability and efficiency
Incorporated as an Apache-module Faster, application/user independent and system-wide availability Accessed via http://host/@SeeAs@/original/path/to/file.daml
Similar to W3C RDF Validation Service Uses Jena RDF/XML Parser,
Apache Xerces, AT&T GraphViz
Available from http://www.ittalks.org/download/
HTTPBrowser
DAML-speaking
Agent
Apache WebServer
DAMLATORModule
Local File SystemDAMLATOR
Cache
accomplishments
DAMLator examplesDAMLator examples
http://daml.umbc.edu/dmldemo/Profile1.daml Original file
http://daml.umbc.edu/@daml@/dmldemo/Profile1.daml Just the DAML markup
http://daml.umbc.edu/@xsb@/dmldemo/Profile1.daml XSB/Prolog terms for triples
http://daml.umbc.edu/@gif@/dmldemo/Profile1.daml Gif of rdf graph, generated with GraphViz
http://daml.umbc.edu/@png@/dmldemo/Profile1.daml Png of rdf graph, generated with GraphViz
http://daml.umbc.edu/@ntriples@/dmldemo/Profile1.daml Rdf in ntriple format
2002 Planned Activity2002 Planned Activity
Xtalks 2.0 Easily configured Personal Agents accept recommendations from
XTalks agents and other agents about events of interest.
Extend ontology mapper beyond topic ontologies
Retrieval Incorporate pre-indexing, pre-query and post-query inference
Use retrieval ranking to limit post-query inference
Rules Jess reasoner for integrated DAML+OIL and RuleML based rules
Application to security/trust policy checking
plans
XTalks Personal AgentXTalks Personal Agent
XPA is a configurable “personal agent” which accepts FIPA messages from XTalks and other instances of XPAs as well as applications, e.g.Outlook.
To be demonstrated by supporting the reasoning of a distributed trust scenario for establishing an agent’s permissions and obligations from descriptions (in DAML+OIL) of their properties and of the security and trust policy in force.
Xtalks 2.0 XTalks 2.0 available on CD and download
Configurable personal agent works with XTalks agents and other personal agents
FIPA platform with distributed trust modules
Retrieval Integrated retrieval over text and markup with inferencing
Demonstration of retrieval-ranked inference control
Rules Demonstration of integrated reasoning with DAML+OIL and RuleML rules
for security/trust policy checking
deliverables
Metrics for measuring progressMetrics for measuring progress
Xtalks Number of interacting/cooperating XTalks personal agents
Integrated retrieval Percentage reduction in inferences when using retrieval rankings
DAML+Oil rules Completeness of DAML+OIL reasoning
DIPS (DAML Inferences per second) on standard benchmarks
metrics
Summary and QuestionsSummary and Questions
Three areas: Agent mediated applications and services Retrieval using both text and semantic web
markup Representing and exploiting rules in DAML+OIL
XTalks as a fielded application testbed
Questions?
summary
PapersPapers
Sasikanth Avancha, Anupam Joshi, and Tim Finin, Enhancing the Bluetooth Service Discovery Protocol, submitted IEEE Wireless Computing and Networking Conference, Orlando, March 17-21, 2002.
Lalana Kagal, Jeffrey Undercoffer, Anupam Joshi, and Tim Finin, Vigil: Providing Trust for Enhanced Security in Pervasive Systems, October 2001. http://umbc.edu/~finin/papers/vigil/
R. Scott Cost et.al., 'ITTALKS: A Case Study in DAML and the Semantic Web', IEEE Intelligent Systems Special Issue, 2002
Lalana Kagal, Jeffrey Undercoffer, Filip Perich, Anupam Joshi, Tim Finin, 'Vigil: Enforcing Security in Ubiquitous Environments', Grace Hopper Celebration of Women in Computing, 2002.
Lalana Kagal, Vladimir Korolev, Sasikanth Avancha, Anupam Joshi, Timothy Finin, 'A SmartSpaces Approach to Service Management for Pervasive Computing', Grace Hopper Celebration of Women in Computing, 2002.
Tim Finin et. al., Information Agents for Mobile and Embedded Devices, Fifth International Workshop Cooperative Information Agents, September 6-8, 2001 Modena, Italy. http://umbc.edu/~finin/papers/cia01/
Lalana Kagal, Tim Finin and Anupam Joshi, Moving from Security to Distributed Trust in Ubiquitous Computing Environments, IEEE Computer, December 2001. http://umbc.edu/~finin/papers/ieee01/
Anupam Joshi, Timothy Finin, and Yelena Yesha, Agents, Mobility, and M-Services: Creating the next generation applications and infrastructure on mobile ad-hoc networks, Workshop on an Infrastructure for Mobile and Wireless Systems, Scottsdale, Arizona, October 15, 2001.
appendix
PapersPapers
Olga Ratsimore, Vladimir Korolev, Anupam Joshi and Tim Finin, Agents2Go: an infrastructure for location-Dependent Service Discovery in the mobile electronic commerce environment, First ACM Mobile Commerce Workshop, July 21, 2001, Rome. http://umbc.edu/~finin/papers/amcw01/
R. Scott Cost et. al., ITTALKS: A Case Student in how the Semantic Web Helps, International Semantic Web Workshop -- Infrastructure and Applications for the Semantic Web, July, 2001, Stanford. http://umbc.edu/~finin/papers/swws01/
Filip Perich et. al., ITTALKS: An Application of Agents in the Semantic Web, Workshop on Engineering Societies in the Agents' World, 7 July 2001, Prague. http://umbc.edu/~finin/papers/esaw01/
Lalana Kagal et. al., A Highly Adaptable Infrastructure for Service Discovery and Management in Ubiquitous Computing, May 2001.
Lalana Kagal, Timothy Finin, and Yun Peng, A Framework for Distributed Trust, Workshop on Autonomy, Delegation, and Control: Interacting with Autonomous Agents, IJCAI-2001, Seattle, August, 2001. http://umbc.edu/~finin/papers/jicai01/
Lalana Kagal et. al., An Infrastructure for Distributed Trust Management, Workshop on Norms and Institutions in Multiagent Systems, Autonomous Agents 2001, Montreal, May 29, 2001. http://umbc.edu/~finin/papers/nimas01/
Lalana Kagal et. al., Centaurus: A Framework for Intelligent Services in a Mobile Environment, International Workshop on Smart Appliances and Wearable Computing (IWSAWC), Scottsdale, Arizona, USA, April 16, 2001. http://umbc.edu/~finin/papers/centaurus/
Harry Chen, Anumpam Joshi, Tim Finin, and Dipanjan Chakraborty, "Dynamic Service Discovery for Mobile Computing: Intelligent Agents meet Jini in the Aether", Baltzer Science Journal on Cluster Computing, Special Issue on Advances in Distributed and Mobile Systems and Communications, 2001.