The BCF 2.0 proposal is public on github: Please use the issue tracker for feedback. Click on the image for the link.
buildingSMART-ISG (Implementer Support Group) has created a task group for defining BCF 2.0 and the result of this work will be provided before the next ISG meeting in Prague, on the 9 of September 2013. There are lots of improvements proposed, most important are:
- Support for multiple snapshots/viewpoints on topics.
- Improved control of colour, visibility and colour was added to visualization. This is a difficult issue as you never know how many models that might be open at the same time. The topic might have been created while two models where opened and is later “covered” by a third domain model.
- New support for bitmaps on viewpoints. This is to allow for overlays of text, sketches etc in viewpoints.
- Support for “BimSnipplets”. These are in effect small ifcXML, ifc2x4 or ifc4 files. This is to support eg. provision for voids.
- Support for “DocumentReference”. Could refer to a file in the topic folder or to an URL.
- Email added to comments for better identification of authors.
- A topic comment can now have the status of open or closed. If more granularity is needed “VerbalStatus” can be used. A set of proposed status lists might be provided with the documentation of the format.
- minor optional improvements like the possibility to index topics was also added.
The improved BCF 2.0 will be backwards compatible with BCF 1.0. The work is being documented on ISG Jira with participants from Catenda, DDS, Iabi, ISG, Solibri and Tekla.
A second task group currently is working on a standardised webservice, so that BCF could be synchronised automatically among various applications and platforms, in future.
In spring 2013, the new release of IFC4 was formally published as
an ISO standard – ISO 16739.
At the end of a long and meticulous process, IFC emerges stronger and better, and ready to win new fans around the world.
‘Accreditation of IFC4 was a welcome achievement after the efforts of everyone involved,’ says Thomas Liebich, AEC3 DE, who led the work through buildingSMART’s Model Support Group.‘At the last round of voting, the response to ISO 16739 DIS [Draft International Standard] was overwhelmingly positive – 11 ‘yes’ votes and zero ‘no’ votes. It doesn’t get better than that.’
Read more in the ifc4 special supplement with the latest bSI Newsletter No.11 IFC4 special supplement – bSI Newsletter No.11
Route to accreditation
The process has involved intensive internal and external reviews to highlight and resolve the issues. As the process took its course, the IFC4 issue database accumulated a total of 1,100 issues that had to be resolved. ‘Software companies usually come in late in the review process,’ explains Thomas. ‘And there was more feedback on the last release candidate than ever before.
IFC has come a long way since the early releases in the mid-1990s. End-users will feel the benefits once IFC4 is implemented in commercial software, and there will be a ripple effect as clients get their projects built more efficiently and sustainably. Until then, newly certified IFC2x3 software should be used.
IFC4 at a glance
• enhances the capability of the IFC specification in its main architectural, building service and structural elements with new geometric, parametric and other features
• enables new BIM workflows – including 4D and 5D model exchanges, manufacturer product libraries, BIM to GIS interoperability, enhanced thermal simulations and sustainability assessments
• links all IFC property definitions to the buildingSMART data dictionary
• improves readability and ease of access to the documentation with numerous implementation concepts and fully linked examples
• contains ifcXML4 schema, fully integrated into the IFC specification in addition to the EXPRESS schema
• has been developed in line with the new mvdXML methodology (as the baseline for future computer-readable model views and data validation services)
• corrects technical problems found since the release of IFC2x3
• enables the extension of IFC to infrastructure and other parts of the built environment
Adoption IfcXML in upcoming version IFC4 from buildingSMART, promising.
Simple IfcXML | Presentation Summary Phase1 by laurenssen
Presentation Summary Phase1 by Thomas Liebich, Matthias Weise – buildingSMART