IFC to JSON: "sub" objects are missing

[franky235]

Hello, I am converting IFC files to .wexbim and .json, working fine but I noticed some objects are missing in the .json file like a IfcSlab (subpart of the IfcRoof), and IfcRailing(s) and IfcStairFlight(s) (subpart of IfcStair) looks like "subparts" are missing in the .json Not familiar with COBIE standard, my question is: is it normal of is it a bug ?

Thanks for your help, Francois

[martin1cerny]

It is a requirement in COBieLiteUK structure for every component to have a type defined which is not the case for these aggregated elements. Data is created in this hierarchy so you will want to investigate this part of the code. COBieLiteUK is not actively maintained at the moment so you will have to make any such a change yourself.

[franky235]

Thanks for your guidance, I changed the code accordingly and I am ready to share it: what is the process ? (sorry I am newbie at github) are you expecting a pull request ? on dev branch ? how ?

[martin1cerny]

Yes, pull request to develop branch would be the best.

[theextremeandy]

hi @franky235, @martin1cerny , I have a similar problem after conversion ifcPlate are missing in the .json IFC file contains 229 ifcPlate obj like this:

#428522= IFCPLATE('1tghYAjEfBQuF89jQoGJnc',#12,'Pannel-Div-072',$,$,#427630,#428519,
'77AAB88A-B4EA-4B6B-83C8-26D6B2413C66');

and 41 ifcPlateType:

#429511= IFCPLATETYPE('0lZzIx0zg90VSq6be1g1TA',#12,'Pannel 1130 x 1210 x 20',$,$,$,$,
'2F8FD4BB-03DA-8901-F734-1A5A01A8174A',$,.NOTDEFINED.);

but no ifcPlate element in json file. can you help me? andrea

ps Also, I try to change into COBieAttributes.config from

<add key="IfcPlate" value="No"/>

to

<add key="IfcPlate" value="Yes"/>

[martin1cerny]

As you will guessed from the name of the project, this JSON is one of many possible forms of COBie. Not all IFC product types are supposed to go into COBie. I think IfcPlate is one of the excluded ones.

[theextremeandy]

Thank you @martin1cerny! I'm looking for the Cobie data scheme but I believe you are certainly right andrea

[I-Sokolov]

All building elements and types are excluded from COBie by default. You may customize COBieContext.Exclude passed to COBieBuilder constructor to change set of excluded types

[theextremeandy]

hi @I-Sokolov, Thank you for your suggestion I'm going to try the solution /BR andrea

[Princepra]

@franky235 , hi franky am facing problem in converting ifc to wexbim. Can you share the conversion code plz.

[franky235]

@Princepra, I use the example code found in documentation, nothing specific on my side: http://docs.xbim.net/examples/creating-wexbim-file.html

[martin1cerny]

Closing the issue as it is no longer related to the original question.