This is a follow up to an article I posted the other day.
With a custom im.schema.json file you can create additional attributes for Infraworks 360 which will allow you to increase the data-richness of your model and expand the possibilities of thematic displays and the way you present the information within your model.
Link to Autodesk Knowledge Network article.
Well done @Matt__W! I wonder if this could be used for extended data in pipes/structures as well?
@Willy_Campbell, one thing I just noticed is that the properties of a structure that's part of a drainage network (from the DESIGN DRAINAGE toolbar) are all grayed out and disabled while the properties of a stand-alone structure (from the CREATE CONCEPTUAL DESIGN FEATURES) aren't.
