GUID

[Ilic.Andrej]

Hello,

I'm not sure if this is the right place to post my question. I assume a replier would have some knowledge in programming, so I hope someone here could give me a clue on what needs to be done.

We are working on a very large project. Many engineering service providers are involved. Since Revit is not the only engineering tool people use, we need to use another software for our common data environment. This software imports IFC file formats.

We created a very detailed tagging procedure. Every element identifier will be maintained by a user. We need to keep those identifiers during IFC export from Revit. After that, we can easily link them to rest of the data that we have in excel. But, if we loose the identifiers during IFC export, we can't do anything...

I have these questions:

1. How can users create and maintain the identifiers? Can we use the parameter “Mark” as an identifier or it has to be the GUID? Can a user change the GUID?
2. How can we keep the identifiers during IFC export? IFC exporting looses the parameter “Mark” and the old GUID is automatically being replaced by a new one…

Any answer would be greatly appreciated.

[RPTHOMAS108 · Accepted solution]

Not sure if I understand the question in terms of your requirements completely however:

Revit IFC exporter has the option below: 

When the export occurs the GUID used for the exported instance is added as an instance parameter on the instance in the Revit model. If then the IFC is exported again later then the exporter should read this instance parameter value to use the same GUID for that export also.

So is this not working or fully supporting your needs, what beyond this is required?

[Ilic.Andrej]

@RPTHOMAS108 thank you! This is what I was looking for!