UIM with DAML-S Service Description

1
UIM with DAML-S Service Description

• Team Members
• Jean-Yves Ouellet
• Kevin Lam
• Yun Xu

2
Outline

• RDF
• DAMLOIL
• DAML-S
• UIM with DAML-S Service Description
• References

3
RDF

• Resource Description Framework (W3C)
• An infrastracture that allows to model
  semi-structured metadata and enables
  knowledge-management allocations.
• Uses XML as an interchange syntax and heavily
  relies on XML namespaces.
• Uses a single directed graph as a model to
  describe resources.
• Aims to enable the entire Web to become a
  semantic Web.
• RDF Schema (RDFS) provides basic structures such
  as classes and properties.

4
RDF Example
5
DAMLOIL

• DARPA Agent Markup Language Ontology Inference
  Layer
• A simple language for expressing more
  sophisticated classifications and properties of
  resources than RDFS
• Provides richer means for expressing constraints
  in schemas
• More facilities for properties
• data typing, multiple ranges and unique
  properties
• inverse properties, transitivity, property
  restriction
• Broadening the concept of class
• disjoint, non-exclusive combinations

6
DAMLOIL

• DAMLOIL file structure
• RDF envelope element
• DAMLOIL header
• Import declarations for using other RDF models
• New class definitions
• Class instances

7
DAMLOIL Example
8
DAML-S

• A new set of classes and properties that are
  defined using DAMLOIL
• Enables the creation of the ontologies for the
  description of specific Web sites in any domain
• Establishes a framework within which the
  descriptions are made and shared
• Supports access to Web resource by content
• Automatic Web service discovery
• Automatic Web service invocation
• Automatic Web service composition and
  interoperation
• Automatic Web service execution monitoring

9
DAML-S

• ServiceProfile
• A high-level description of service with name,
  inputs and outputs.
• Service providers use discovery/location
  registry to advertise service.
• Service requesters use the profile to specify
  what service they need.
• ServiceModel
• Description of the processes or the algorithm
  used to implement a service.
• ServiceGrounding
• Specification of the details of how an agent can
  access a service communication protocols, port
  numbers and data types.

10
DAML-S Service Advertisement Example
lt?xml version"1.0" encoding"ISO-8859-1"
?gt ltrdfRDF xmlnsrdf "http//www.w3.org/19
99/02/22-rdf-syntax-ns" xmlnsrdfs
"http//www.w3.org/2000/01/rdf-schema"
xmlnsdaml "http//www.daml.org/2001/03/damlo
il" xmlnsprofile "http//www.daml.org/service
s/daml-s/0.7/Profile.daml" xmlnsxsd
"http//www.w3.org/2000/10/XMLSchema.xsd"gt
ltdamlOntology about""gt ltdamlversionInfogt1.0
lt/damlversionInfogt ltrdfscommentgt
Description of the services supported by agent
bond007. lt/rdfscommentgt ltdamlimports
rdfresource"http//www.w3.org/1999/02/22-rdf-syn
tax-ns" /gt ltdamlimports rdfresource"http//
www.w3.org/2000/01/rdf-schema" /gt
ltdamlimports rdfresource"http//www.daml.org/20
01/03/damloil" /gt ltdamlimports
rdfresource"http//www.daml.org/services/daml-s/
0.7/Profile.daml" /gt lt/damlOntologygt lt!--
Instances of the Profile class
--gt ltprofileProfile rdfID"bond007_printer"gt
ltrdfslabelgt bond007 printer lt/rdfslabelgt
ltrdfscommentgt Printer service supported
by agent bond007 lt/rdfscommentgt
11
DAML-S Service Advertisement Example (contd)
ltprofileserviceNamegt
bond007_printer_service lt/profileserviceNamegt
ltprofiletextDescriptiongt A message
can be sent directly to a printer
lt/profiletextDescriptiongt ltprofileserviceCat
egorygtprinterlt/profileserviceCategorygt
ltprofileinputgt ltprofileParameterDesription
gt ltprofileparameterNamegtmessagelt/profile
parameterNamegt ltprofilerestrictedTo
rdfresource"http//www.w3.org/2000/10/XMLSc
hema.xsdstring" /gt lt/profileParameterDesri
ptiongt lt/profileinputgt
ltprofilecontactInformationgt
ltprofileActorgt ltprofilenamegtbond007lt/pro
filenamegt lt/profileActorgt
lt/profilecontactInformationgt
lt/profileProfilegt lt/rdfRDFgt
12
DAML-S Service Request Example
lt?xml version"1.0" encoding"ISO-8859-1"
?gt ltrdfRDF xmlnsrdf "http//www.w3.org/19
99/02/22-rdf-syntax-ns" xmlnsrdfs
"http//www.w3.org/2000/01/rdf-schema"
xmlnsdaml "http//www.daml.org/2001/03/damlo
il" xmlnsprofile "http//www.daml.org/service
s/daml-s/0.7/Profile.daml" xmlnsxsd
"http//www.w3.org/2000/10/XMLSchema.xsd"gt
ltdamlOntology about""gt ltdamlversionInfogt1.0
lt/damlversionInfogt ltdamlimports
rdfresource"http//www.w3.org/1999/02/22-rdf-syn
tax-ns" /gt ltdamlimports rdfresource"http//
www.w3.org/2000/01/rdf-schema" /gt
ltdamlimports rdfresource"http//www.daml.org/20
01/03/damloil" /gt ltdamlimports
rdfresource"http//www.daml.org/services/daml-s/
0.7/Profile.daml" /gt lt/damlOntologygt
ltprofileProfilegt ltprofileserviceCategorygtpri
ntlt/profileserviceCategorygt
ltprofilecontactInformationgt
ltprofileActorgt ltprofilenamegtbondlt/profil
enamegt lt/profileActorgt
lt/profilecontactInformationgt
lt/profileProfilegt lt/rdfRDFgt
13
UIM with Service Advertisement and Discovery

• - Based on a RMI version of UIM
• - DAML-S ServiceProfile class only

14
New UIM Graphical User Interface
15
Modified Register Command

• New Register Panel
• Parameters AgentId, Password, Service
  Advertisement
• Two methods for advertising a DAML-S file1)
  Enter the filename of an existing DAML-S
  file.2) Click on the checkboxes to select the
  supported services. The corresponding DAML-S file
  is generated automatically.

16
New Search Command

• New Search Panel
• AgentId field
• The server search engine returns a list of the
  agents whose AgentId name contains the sub-string
  entered in the AgentId field. An empty sub-string
  will return a list of all registered agents.
• Service field
• The server search engine returns a list of the
  agents whose Service names contains the
  sub-string entered in the Service field. An empty
  sub-string will return a list of all registered
  agents.
• Search Results field
• The server search engine returns a short
  description of each agent matching the search
  parameters in both fields AgentId AND Service.
  These short descriptionss are displayed in the
  Search Results field.

17
Server DOM Tree Database

• Hashtable
• Key AgentId
• Value DOM tree generated from DAML-S
  description
• Database PersistenceEach DAML-S service
  description is saved into a separate file. The
  DAML-S filenames are saved into an XML file (see
  example below)

ltservicetablegt ltagent namekevin
filenamekevin.damls /gt ltagent namebetty
filenamebetty.damls /gt ltagent namejean
filenamejean.damls /gt lt/servicetablegt
18
Server Search Engine

• Simple Matching Algorithm
• The DAML-S service request is converted into a
  DOM tree.
• The search engine extracts the profileserviceCate
  gory and profilename ELEMENTs from every DOM
  tree.
• For each service advertisement, the values of the
  extracted ELEMENTs are compared with those of the
  service request.
• A match is declared if the service request value
  is a sub-string of the service advertisement
  value in both ELEMENTs profilename AND
  profileserviceCategory.

19
Matching Algorithm
20
References

• http//www.daml.org/services.html
• A. Ankolekar, M. Burstein, J.R. Hobbs, O.
  Lassila, D.L. Martin, S.A. McIlraith, S.
  Narayanan, M.Paolucci, T. Payne, K. Sycara, H.
  Zeng. DAML-S Semantic Markup For Web Services.
• M. Paolucci, T. Kawamura, T.R. Payne, K. Sycara.
  Semantic Matching of Web Services Capabilities.
• http//www.daml.org/2001/03/reference.html