human-centred knowledge-based model access service for engineers
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Human-Centred Knowledge-Based Model Access Service for
Engineers
Peter Katranuschkov & Alexander Gehre
TU Dresden, Germany
CIB W78 Conference 2002 - Aarhus
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
Outline
Knowledge-Based MModel AAccess SService = MASMAS
1. Background2. Objectives3. Architecture4. Services
– Basic– Advanced (Reasoning agent, Ontology Browser)– Example (Browser Walkthrough)
5. Conclusions
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
Background
• MAS is being developed in the frames of the EU project ISTforCE (IST-1999-11508, Feb. 2000 – September 2002)
• Main ISTforCE deliverable: Open collaboration environment where end users and providers of eng. information, services and tools can meet
• Achievements in ISTforCE strongly supported by MAS:– Human-centred instead of project-centred environment– Multi-project support – Flexible product data exchange and sharing – Infrastructure for on-line e-Business, including legal and
financial aspects of the collaboration process• MAS is a self-contained system but its functionality
is fully unfolded only through the integration with the other infrastructure services of the ISTforCE platform
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
ISTforCE Core Information Services
MAS within the ISTforCE platform
Project Infrastructure
Services
Multi-Project Integration
Services
Generic Infrastructure
Services
people projects services companies
PDMS EDMS ... ECS TOS ...PPS
Remote (Rental) Engineering Services
CAD / CAFM Analysis Tools ...ISTforCE RESISTforCE RESISTforCE RES
MASMAS
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
ISTforCE Core Information Services
MAS within the ISTforCE platform
Project Infrastructure
Services
Multi-Project Integration
Services
Generic Infrastructure
Services
services
EDMS ... TOS ...
Remote (Rental) Engineering Services
ISTforCE RESISTforCE RESISTforCE RES CAD / CAFM Analysis Tools ...
PPS MASMAS
people projects companies
PDMS ECS
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
ISTforCE Core Information Services
MAS within the ISTforCE platform
Project Infrastructure
Services
Multi-Project Integration
Services
Generic Infrastructure
Services
services
EDMS ... TOS ...
Remote (Rental) Engineering Services
MASMAS
ISTforCE RESISTforCE RESISTforCE RES CAD / CAFM Analysis Tools ...
PPS ECSPDMS
people projects companies
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
MAS Objectives
• Central access point for product model services based on IFC and STEP/EXPRESS
• User-friendly management of product models– Transparent access to different Product Data Servers– Set of functions for product data processing on
model / object / attribute level– Advanced knowledge based functionality
(sophisticated queries, request interpretation, solvers)– Intelligent product model browsing
• Enabling model access to a wide range of clients using different communication paradigms
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
Sun EJB Framework
Information Logic
(EJB Cont.)
Presentation Logic (Web Container)
MAS Architecture
ExplanationComponentFront - End
(Servlets, JSP, HTML)
ExplanationComponentFront - End
(Servlets, JSP, HTML)
Product Data Servers
Product Data Servers
Product Data Servers
Product Data Servers
Product Data Product Data ServerServerss
Product Data Product Data ServerServerss
Core Core Information Information
ServicesServices
Core Core Information Information
ServicesServices
MAS Clients MAS Clients ( Local Appl., RES, Web-Browser )( Local Appl., RES, Web-Browser )
MAS Clients MAS Clients ( Local Appl., RES, Web-Browser )( Local Appl., RES, Web-Browser )
ProductData
Controller
ProductData
Controller
ClientAdapters(RMI-IIOP,CORBA)
ClientAdapters(RMI-IIOP,CORBA)
ReasoningAgent
ReasoningAgent
ProductModel &OntologyProvider
ProductModel &OntologyProvider
Access Control
Interface(XML/HTTP)
Access Control
Interface(XML/HTTP)
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
Basic Services
• SPF-based product model access- upload and download of product models using a standard Web
Browser or a MAS Client Adapter- generalized access to different project-specific product data servers
supported by information provided by the Core Information Server- Integrated Persistent Model Cache to efficiently support consistency
and version management w.r.t. the plugged-in product data servers• Product data access on object / attribute level
- generic access methods for simple filtering / inspection / querying / retrieval / modification of objects and their attributes using appropriate RPC mechanisms (Client Adapters)
• These basic services are essential for the advanced MAS functions and for the integration of client applications
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
Reason
ing
Ag
en
t
Solver Solver Solver Solver
response
Advanced Services: Reasoning Agent
request
SolutionProvider
RequestInterpreter
I II III
MAS integratedProduct Model Server
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
Advanced Services: Engineering Ontology
• Translation of the strictly formalised IFC data structures to an engineering vocabulary
• Definitions completely based on the XML standard(uses XML Schema as baseline)
• Open extensible specification
• Real time mapping between the EO definitions and the underlying IFC 2x model
• Easy to learn and use client-side Ontology Browser
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
Engineering Ontology Information Flow
navigate, access operations
uses EO Presentation Schema (xslt) and Java Server Pages (jsp)
to create Presentation Documents (html)
Web ContainerWeb Container
EO Repr. InstanceIFC to EO mappings
MAS - PDSMAS - PDS
provides the IFC product model data
IFC
Engineer‘s Web BrowserEngineer‘s Web Browser
HTML document with browsing / navigation functionality
render
Ontology RepositoryOntology Repository
EO Definition (xml)
EO Specification Schema (xsd)
EO Extended Specification (xsd)
ExplanationExplanationComponentComponent
Ontology ProviderOntology Provider
add/update validate specifications
uses the Ontology Repository to create an
EO Representation Instance (xml) on the basis of IFC model data
Ontology Ontology InterpreterInterpreter
EO specifications
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
MAS Explanation Component: Walkthrough
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
MAS Explanation Component: Walkthrough
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
MAS Explanation Component: Walkthrough
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
MAS Explanation Component: Walkthrough
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
MAS Explanation Component: Walkthrough
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
MAS Explanation Component: Walkthrough
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
MAS Explanation Component: Walkthrough
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
MAS Explanation Component: Walkthrough
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
MAS Explanation Component: Walkthrough
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
MAS Explanation Component: Walkthrough
Geometry view
Still under development …Still under development …
CIB W78 Conference 2002 - Aarhus P. Katranuschkov, A. Gehre
Summary: Achievements Revisited
• Human-centred instead of project-centred Human-centred instead of project-centred environmentenvironment transparent access to product data services,
intelligent ontology-based browsing capabilities, personal planning support
• Multi-project supportMulti-project support access to multiple product servers for multiple projects
• Flexible product data exchange and sharingFlexible product data exchange and sharing broad range of functions for full/partial model exchange
and sharing, advanced add-on functionality based on agent technology, open architecture for further ext.
• Infrastructure for on-line e-Business, including legal Infrastructure for on-line e-Business, including legal and financial aspects of the collaboration processand financial aspects of the collaboration process integrated authentication and access control features
We must either institute We must either institute conventional forms of expression conventional forms of expression or else pretend that we have or else pretend that we have nothing to express.nothing to express.
- George Santayana, Soliloquies in England- George Santayana, Soliloquies in England
Thank you for your attention
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