(Slab node) creates Building slabs including DataGroup selections.

1. Add a Slab node to the Graph and select the ByVertices technique. Its required input ports are visible on the node.
2. Add four Point nodes to the Graph. The default ByCartesianCoordinates technique is automatically defined for both points. Keep them as is.
3. Click next to the CatalogItem port. The expression field becomes a drop menu. The menu is automatically loaded with DataGroup catalogs containing Slab types. Select a slab catalog item ('Concrete Slab').
4. Click next to the Vertices port. Position the cursor inside the expression field, press and hold <Ctrl>, and select the four points in a counter clockwise order. The expression generated is {point06, point07, point08, point05}, and wires are drawn to the point nodes' overall nodes.

The node will resolve, and the slab will be added to the model view.