## StructuredDocumentTa.building_block_category property Specifies category of building block for this **SDT** node. Can not be ``None``. ```python @property def building_block_category(self) -> st......```python doc = aw.Document() building_block_sdt = aw.markup.Stru...StructuredDocumentTa(doc, aw.markup.SdtType.BUILDING_BLOCK_GALLERY, aw.markup.MarkupLevel...