ReadonlyCompleteFalse when part of the template could not be analyzed, so Names may miss entries.
ReadonlyNamesTop-level names the template and the templates it pulls in read. Also holds loop, set, filter and keyword names.
Optional ReadonlyParseTrue when the text, or a template it pulls in, does not parse. Registering an extension can change such a result.
Optional ReadonlyReasonWhy Complete is false.
Variables a template reads.