Presentation held by Jakob Beetz at the BuildingSMART Standards Summit 2015 in Singapore. The presentation was made in the Product Room and aimed at investigating and discussing the relation between the Linked Data Working Group (LDWG) and the buildingSMART Data Dictionary (bSDD) Working Group.

1. Use cases for ifcOWL and Linked Data in the
buildingSMART ecosystem
Jakob Beetz, Pieter Pauwels
buildingSMART Standards Summit
Singapore
October 2015

4. Product Information
Conceptinstanceindex
IFD (Concepts)Search Engine IFC (CAD)
librarians
manufacturers
Product Information BIM Model
engineer

5. Now... that should clear up a few things around here
© Horrocks, Oxford University

6. PAGE14-11-2014
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Unicode URI
XML + XML-NS + XML Schema
RDF+RDF Schema
OWL
Logic
Proof
DigitalSignature
Trust

7. BIM
GIS

10. Centralized vocabulary repository

11. Peer-to-peer, distributed vocabulary
repositories

12. Hybrid cascading management of
distributed vocabularies
buildingSMART
International
bSDD group
End-users

13.  restricted to
skos:Concept
 semantically strongest with
potential unwanted side
effects (see [Halpin et al
2010])
 semantically
‘poor’/weak

14. Similarity Ontology [Halpin et al 2010]

18. :Building-type-ifdSubject
rdf:type rdf:Statement ;
rdf:object :ifdSubject ;
rdf:predicate rdf:type ;
rdf:subject :Building ;
rdfs:isDefinedBy :ifdUser_1 .
:RWS { :Building rdf:type ifd:ifdSubject .
:OfficeBuilding rdf:type ifd:Subject .
:_ rdf:type ifd:ifdRelSpecializes .
:_ ifd:relating_object :Building .
:_ ifd:related_objects :OfficeBuilding
}
RDF reification using RDF descriptions are the default, yet
somewhat cumbersome solution:
Table 1 RDF reification "User 1 claims that 'Building' is an instance of ifdSubject”
Another approach is to group a number of triplets into a graph
Table 2 Named Graphs clustering several statements using the TriG syntax
[IfdSubject]
Office
building
[ifdSubject]
Building
[ifdRel
Specializes]
ifdRelatingPhenomenon idfRelatedPhenomena
[ifdContext]
“SAA
Objecten”
isContextFor
[ifdUser]
“Mick Baggen”
ContextOwners
[ifdOrganisation]
“Rijkswaterstaat”
Members
[ifdOrganisation]
“bsDD”Maintains Maintains
Provenance issues
context in RDF
who-did-what-why-when-reliability-trust-thingies

19. Networked data sets:
versioning issues

20. Versioning issues: solution approach using deltas (Berners-Lee et al 2005; others)

21. HVAC
Engineer
Constr.
Engineer
Building
Owner
Civil
Engineer
Structural
Engineer
Facilities
Manager
Energy
Consultant
Architect
Shared Data
Model
HVAC
Engineer
Constr.
Engineer
Building
Owner
Civil
Engineer
Structural
Engineer
Facilities
Manager
Energy
Consultant
Architect

26. Networked data sets
Modeling expert
Modeling expert

27. Usage - Current state of the art:
reference to bSDD from IFC according to SN/TS 2489

28. Networked data sets:
The Semantic Web – technology stack

29. Networked data sets:
Legacy integration

30. Semantic Enrichment prototype demo

34. SELECT DISTINCT
*
FROM <http://company_a.nl/projecten/offerte_zitbank>
FROM <http://anotherCompany.nl/zitbank_project>
WHERE
{
?s rdf:type cbim:PhysicalObject .
?s cbimfs:nonFunctionalRequirement ?requirement
SERVICE <http://rws.nl/projecten/aanvraag_zitbank>{
?requirement
cbimfs:nonFunctionalRequirementType
?req_type .
?requirement cbimfs:name ?req_name .
}
}
GROUP_BY (?s)

38. • … many of things shown here are academic proof-of-
concepts not tested in the grim reality
• … Scalability? Performance?
• … Loads of work to be done for each of these cases …
even if standing on the shoulders of giants and the hive-
mind
• "I suppose it is tempting, if the only tool you have is a
hammer, to treat everything as if it were a nail.“
Abraham H. Maslow (1966). The Psychology of Science. p. 15

40. ISO 15926-11
• Industrial automation systems and integration —
Integration of life-cycle data for process plants
including oil and gas production facilities —
Part 11: Methodology for simplified industrial usage
of reference data
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41. ISO 15926

42. ISO 15926-11
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43. RDL / Referenciekader in ISO 15926

44. ISO 15926
source:Paap,2010