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Questions tagged [ifc]

The Industry Foundation Classes (IFC) are an open standard in civil engineering used to describe building and construction industry data.

The Industry Foundation Classes (IFC) are an open standard in civil engineering used to describe building and construction industry data.

There are officially 3 file formats specified: STEP, XML and JSON. STEP is most commonly used as exchange format for projects, XML and JSON are meant for web exchange.

See the buildingSMART IFC page for more information.

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How to use ontology alignments to transfer instances from one ontology to another one (Abox to Tbox)

I have an IFC file converted to an ifcOWL (let's call it Ontology A, which is a .owl file) file containing classes and instances of interest. On the other hand, I have a modular ontology (let's call it Ontology B, which is a .owl file) for which the…
arash
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Get system with elements from a model

How do I get the elements in a HVAC system? I can access the list of the systems in a model with the following code: var systems = model.Instances.OfType(); This returns a list of all the systems in the model. How to access the elements…
Joni Turunen
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how to import data (instances) into an existing ontology in protoge

Can anyone tell me the steps that are required to populate an Ontology? I have created a domain-specific Ontology (TBox = Terminological knowledge) which consists of defined classes and relations. On the other hand, I have an IFC file (The Industry…
arash
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How to make the Forge Data Visualization extension work with IFC files?

I followed the tutorials from the Forge Data Visualization extension documentation: https://forge.autodesk.com/en/docs/dataviz/v1/developers_guide/quickstart/ on a IFC file and everything seems to work except for the coloring of the rooms, which…
AN00
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Get geometry from a IFC 3D entity using Ifcopenshell and OpenCascade

I have multiple standard formed bricks in an IFC file of the type IfcBuildingElementProxy. While I already managed to extract their positions from the IFC file, I now struggle to get the geometry (lenght, height, widht) from the file. I know that…
CrazyZomboy
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What would be the reason that I can't make the ElementIDs of these objects in Revit match ones in a Revit file?

I am creating a plugin that makes use of the code available from BCFier to select elements from an external server version of the file and highlight them in a Revit view, except the elements are clearly not found in Revit as all elements appear and…
Tom Paganuzzi
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Is it possible to get AEC model data fofr a IFC4 file with Forge model derivative APIs?

I am trying to read simple AEC data such as Level and components etc, I came across .rvt files supports extraction AEC data as explained here :https://forge.autodesk.com/blog/consume-aec-data-which-are-model-derivative-api, I am trying to achieve…
AbhinandanS
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IfcOpenShell: Segfault when trying to return a dictionary containing ifcopenshell objects and their corresponding shapes

im trying to extract all the IfcProduct-shapes from a ifc file and return them (with their corresponding Product) to another part of my program. The problem is that when i try to return a dictionary containing those objects with their corresponding…
j-wala
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How do I create and manipulate a Table property for an IFC object using Xbim?

I am working off of the basic example for amending data (https://github.com/xBimTeam/XbimEssentials). The only thing I'm changing is within the code below, where I want to add an IfcPropertyTableValue instead of an IfcPropertySingleValue. This code…
Oskar Billington
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Are IfcOpeningElements available in Autodesk Forge after conversion from IFC to SVF?

I followed the View your models tutorial. IFC to SVF conversion works reasonably well. However, some essential elements are missing after conversion for construction. According to another SO question IfcSpaces are ignored but the the wish is already…
Dominik
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Which APP or software can revert IFC to JSON

Just a little question. I mean, JSON is so good in the Web developing. So I try to ask you which APP or software can revert IFC to JSON.
keleisi2001
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Autodesk Forge import IFC failed

our customer try to show IFC model through method https://developer.api.autodesk.com/oss/v2/buckets/bucket_name/objects/model_name. IFC model is huge, about 100km, it is road design. He can't show it in Forge, he got error that model is empty,…
Milann
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Exporting ifc file from revit file in Forge using specific settings

Looking up online I only found a way to export a Revit file to IFC using the settings inside the Revit File already. Is there a way to export an ifc file from a Revit model using a specific settings (not the settings inside the Revit model)? (For…
Razyo
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How to create a simple IFC file given end points of the beam and a cross section

I want to create an IFC file which represents a beam. The inputs I have is 2 points and a cross section definition. The purpose is to view the shape of the beam. Can someone point me in the right direction. Does XBim have something which will enable…
Koshy Koshy
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How can i change an objects IfcClassification with python/ifcopenshell, f.ex IfcBuildingElementProxy to IfcWindow?

I have a model with many elements that is classified as ifcbuildingelementproxy (or unclassified as that is the standard of the ifc exporting software aka ifcObject). I have a code that finds all the elements i want to change the classification of,…
Thomas M
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