Structured data
Information captured in a defined format — a schema — so every instance is uniform and the templates can read and project it reliably.
Structured data is information that follows a defined format — a schema — rather than free-form prose. The schema says what fields a piece of information has and what each one means, so every instance is captured the same way and a template can read it and render it reliably.
A wskill is built entirely from structured data. The unit kinds — concept, entity, fact and process — are themselves schemas, and a topic's knowledge is encoded into those formats. When a topic has a shape that recurs and the four built-in kinds don't fit, you create a new schema for it (a typed block in schema/extensions.wcl); the new format is then captured and projected exactly like the built-in ones.