Property:Has unit kind
The content kind of an indexed unit — table (the unit body is a wikitable) or prose — set by Template:Indexing via its named parameter kind.
The value is derived from the unit body by the indexer (tools/indexing/_units.py), never written by a producer or guessed by the LLM. Retrieval filters on it: slide building wants tables, answer drafting wants prose.
Plain text — NOT a page link. (An undeclared SMW property defaults to type Page, which would turn the value into a broken article link; declaring it Text renders it as text.)