expose custom Revit attribute in IFC

Hi @fungry21,

The Revit reader will extract all the properties into feature attributes, but at present it can only expose a fixed set of attributes, so we limited it to the most common. Those attribute are still on the features, however, and just need to be exposed with the AttributeExposer to be used in Workbench.

If you add an Inspector to the workspace and connect the Revit feature types to it, then run the workspace, you will see all the attributes on each feature in the Feature Information window of the Data Inspector. You can click on each attribute name, then copy and paste it into the AttributeExposer.

A more more complex, but faster method is to send each feature type to an Aggregator, with Mode set to Attributes Only and Accumulation Mode set to Merge Incoming Attributes. Next, use an AttributeExploder to create a separate feature for each attribute, with the attribute name stored in _att_name. Finally, write to a CSV file, With only an _att_name column.

This will give you a text file that lists all the attribute names, which can be imported into the AttributeExposer, using the Import Button. If you have a large number of unexposed attributes, this is much faster than cutting and pasting from Data Inspector.

This process is a good candidate for an FME Hub custom transformer, and I will try to get one up in the next few days.

Hi Dave.

A bit late to the party on this one, but Im having major problems reading some IFCclasses. The attributes exist in IFC, but not in the inspector. Ive attached an explanation document that helps define the problem with a test IFC. Can you help??

fmeifcissue.

pdftest.zip