The document discusses IFC2RDF tools that can convert Industry Foundation Classes (IFC) files into Resource Description Framework (RDF) triples. It describes the IFC2RDF converter, which includes conversion code, executable JAR files, documentation, and a REST interface. The converter allows generating RDF graphs and linked data from IFC files. It also discusses developing custom rules, inference engines, and SPARQL queries to generate model view definitions from the converted IFC data.

1. IFC2RDF tools
Pieter Pauwels, Ghent University
pipauwel.pauwels@ugent.be
CIB W078 Workshop on Accelerating BIM Research
26 October 2015

2. INTRODUCTION

3. Information: see http://www.slideshare.net/metade/linked-data-on-the-bbc

4. Information: see http://www.slideshare.net/metade/linked-data-on-the-bbc

5. Information: see http://www.slideshare.net/metade/linked-data-on-the-bbc

6. 6
Image courtesy: Jakob Beetz, TU Eindhoven

7. ifcOWL available
EXPRESSIFC-SPF
XSDXML
ifcOWLRDF

9. 9
The front office
[WWW1] http://www.buildingsmart-tech.org/future/linked-data/
[WWW2] http://www.buildingsmart.org/standards/standards-organization/groups/linked-
data-working-group/

10. IFC2RDF TOOLING
LET US GO BACKSTAGE

11. 11
The back office
[WWW] https://github.com/mmlab/IFC-to-RDF-converter/
JAVA
executable JARs
REST interface
converter code
documentation

12. • Converter code
– Conversion code
– Aalto GUI
• Executable JARs and documentation
• RESTful interface
Structure of the back office

13. 13

14. 14

15. @prefix : <http://www.buildingsmart-tech.org/ifcOWL#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix mvd: <http://linkedbuildingdata.net/ifc/rules/20150630_144046/> .
@prefix dce: <http://purl.org/dc/elements/1.1/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix inst: <http://linkedbuildingdata.net/ifc/instances20150609_015154#> .
@prefix log: <http://www.w3.org/2000/10/swap/log#> .
inst:IfcLabel_273230
a mvd:IfcLabel ;
mvd:has_string "Ghent" .
inst:IfcLabel_273233
a mvd:IfcLabel ;
mvd:has_string "Belgium" .
inst:IfcBuilding_36
a mvd:IfcBuilding ;
mvd:BuildingAddress inst:IfcPostalAddress_35 .
inst:IfcPostalAddress_35
a mvd:IfcPostalAddress ;
mvd:Country inst:IfcLabel_273233 ;
mvd:Region inst:IfcLabel_273231 ;
mvd:Town inst:IfcLabel_273230 .
inst:IfcLabel_273231
a mvd:IfcLabel ;
mvd:has_string "Flanders" .
[WWW] samples at http://smartlab1.elis.ugent.be:8889/IFC-repo/

16. 16
Including a stand-alone GUI tool
Implementation by Jyrki Oraskari – Aalto University

17. • Converter code
• Executable JARs and documentation
• RESTful interface
Structure of the back office

18. 18
Including minimal documentation

19. [WWW] https://github.com/mmlab/IFC-to-RDF-converter/

20. • Converter code
• Executable JARs and documentation
• RESTful interface
Structure of the back office

21. [WWW] https://github.com/mmlab/IFC-to-RDF-converter/

23. 23
Including a RESTful web interface
Public demo server: http://smartlab1.elis.ugent.be:8889/IFC-repo/

24. IN ADDITION

25. • Open source BIMserver
• HTML documentation of the ontology
• DRUMBEAT
Bonus tracks

26. [WWW] http://thisisanexperimentalserver.com/

27. Implementation as a serialiser
within open source BIMServer
27
http://bimserver.org/

28. • Open source BIMserver
• HTML documentation of the ontology
Bonus tracks

29. Implemented using WIDOCO
+ manual post-processing
Daniel Garijo - https://github.com/dgarijo/Widoco

30. HTML documentation pages available
Ifc2x_all_lf.exp
IFC2X2_ADD1.exp
IFC2X2_FINAL.exp
IFC2X2_PLATFORM.exp
IFC2X3_Final.exp
IFC2X3_TC1.exp
IFC4.exp
IFC4_ADD1.exp
not supported
not supported
not supported
not supported
IFC2X3_Final.owl / .ttl
IFC2X3_TC1.owl / .ttl
IFC4.owl / .ttl
IFC4_ADD1.owl / .ttl
http://users.ugent.be/~pipauwel/ontologies/ifc/20150925/IFC4_ADD1/index.html
http://users.ugent.be/~pipauwel/ontologies/ifc/20150925/IFC4/index.html
http://users.ugent.be/~pipauwel/ontologies/ifc/20150925/IFC2X3_TC1/index.html
http://users.ugent.be/~pipauwel/ontologies/ifc/20150925/IFC2X3_Final/index.html

31. 31
HTML documentation pages (1)

32. 32
HTML documentation pages (2)

33. 33
HTML documentation pages (3)

34. • Open source BIMserver
• HTML documentation of the ontology
• DRUMBEAT
Bonus tracks

35. [WWW] http://drumbeat.cs.hut.fi/ifc2ld-new/

36. TRACKS IN DEVELOPMENT

37. • Custom rules and inference engine
• SPARQL queries for MVD generation
And many more…
Tracks in development

38. Rules schematic overview
inference engine
OWL ontologies
query
User
RDF Repository
interface
IF-THEN rule repository
response in
RDF graph

39. Acoustic building performance checking
P. Pauwels, D. Van Deursen, R. Verstraeten, J. De Roo, R. De Meyer, R. Van de Walle, J. Van Campenhout. A semantic
rule checking environment for building performance checking. Automation in Construction 20: 506-518, 2011.
 Speed!
 Formal representation and structure!
 Proof available!

40. http://users.ugent.be/~pipauwel/reasoningsamples/acousticsRuleChecking/readme.html
http://users.ugent.be/~pipauwel/reasoningsamples/geometricalinferences_IFCtoX3DtoSTL/readme.html
http://users.ugent.be/~pipauwel/reasoningsamples/IFCmodelperspectives/readme.html

41. • Custom rules and inference engine
• SPARQL queries for MVD generation
And many more…
Tracks in development

42. What is available
IFC SPF IFC EXPRESS
IFC RDF graph ifcOWL
double conversion /
translation

43. Where is MVD currently
IFC SPF IFC EXPRESS
IFC RDF graph ifcOWL
double conversion /
translation
SUBSET IFC SPF
(MVD)
SUBSET IFC EXPRESS
(MVD SPEC in EXP)
selection file (MVDXML)

44. https://github.com/BuildingSMART/IfcDoc
http://www.buildingsmart-tech.org/specifications/specification-tools/ifcdoc-tool

45. What do we want to do with this
IFC SPF IFC EXPRESS
IFC RDF graph ifcOWL
double conversion /
translation
SUBSET IFC SPF
(MVD)
SUBSET IFC EXPRESS
(MVD SPEC in EXP)
SUBSET IFC RDF graph
(MVD)
SUBSET MVD ontology
(MVD SPEC in OWL)
selection file (MVDXML)
rewrite rules (or queries)

46. Thank you
Pieter Pauwels, Ghent University
pipauwel.pauwels@ugent.be