Hello We ask ourselves the following: Where are requirements laid down in the IFC? e.g. In our understanding, fire rating is a property of a component, not a requirement. This property can exceed the requirement, but should not be less than this. These questions arise with AcoustingRating, FireRa…

Beware the “EPset_” prefix is also reserved by buildingSMART for official extended property sets. There are recommendations being discussed to make the prefix based on Country and Organisation. e.g. “BEabc” or similar. I understand that there may be a confusion for the end user, when some propertie…

Interesting topic. So from what I understand is that by using Pset_blablabla for a new set or properties is not quite following the bsI standard? I have a case where we are using Pset_DoorCustom or Pset_SpaceCustom. I do not understand why would the prefix “Pset” is not allowed to be uses to extend…

Beside the important question “where are requirements mapped in the IFC?” in current BIM practice I would like to sketch a target bearing for future BIM developments: In the light of actual research on decentralised common data environments and linked building data (e.g. https://www.researchgate.n…

Hi agron! This is described here, for instance: https://standards.buildingsmart.org/IFC/RELEASE/IFC4_1/FINAL/HTML/schema/ifckernel/lexical/ifcpropertyset.htm “In addition any user defined property set can be captured. Property sets that are not declared as part of the IFC specification shall have …

Hi Boris, In brief - you compare values of IFC-attributes with requirements. These attributes and requirements are about the same characteristic of object/statement. There are a lot of world-wide examples, how to do it - Norway, Korea, Australia, New Zealand, Singapore, USA, UK, Russia etc. For ex…

Thank you for your answer. yes, I also suspect that the key point is the way the models are structured. We often have the situation that three models have the same elements in play: architecture, engineer and entrepreneur (timber construction). all three create models with very different goals. The …

Hello, Alexey. This is just an interpretation of what we can read from the specification. As it considers the Pset_ a prefix we could use it in the middle of the string, as many of us do with the aim to distinguish it from the Software OOTB Pset (mostly with any reference to the acronym Pset in th…

Is the uncoordinated emergence of arbitrary defined properties the result of an inadequate consensus about modelling principles and a lack of standardization? Will the new bS technical roadmap address this lack of standardization?

I think not all of the issues/challenges, but most of them are solvable: Some months ago bSI friends mentioned that they think about “UML/SysML” which “IF” this happens which I’m not sure, because STEP traditionally prefers EXPRESS-G, will improve this area a lot STEP AP 242 as I mentioned before…

In general: where are requirements mapped in the IFC?

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ReD_CoDE February 27, 2020, 7:15am 26

Which one you prefer? The approach IfcDoc follows, or the approach IfcXtreme suggest which is node-base?

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In general: where are requirements mapped in the IFC?

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