I need a Grasshopper definition that takes a Rhino geometry input, reads a CSV table, and exports an IFC slab enriched with my own PropertySet structure. GeometryGym components are the quickest route, so please base the workflow on that add-in if possible. Core requirements • Generate a valid IFC slab element from the supplied geometry. • Map each row of the CSV to the slab’s custom PropertySet fields and attach them on export. • Follow my in-house naming guidelines for every property key; I will share the exact list once the job starts. • Advise me on an appropriate IFC schema version—IFC2x3 or IFC4—then set the exporter accordingly. Deliverables 1. A clean, commented .gh file (and any custom C#/Python nodes you create). 2. One sample IFC file showing the property data embedded. 3. A short read-me explaining how to plug in fresh geometry and CSV files. Completion is accepted when the IFC opens in a mainstream viewer (e.g., Solibri, BIMcollab Zoom) with all properties visible under the slab entity and matching the CSV values exactly.