3.4 Declared types

• data — a product type with named fields (§4.2).
• enum — a sum type with variants; variants MAY have fields (§4.4).
• interface — a structural interface (§4.6).
• actor, service, topic, config, dynamic — special declarations (§10–§14).

Related diagnostics

unknown-type

Source: docs/spec/oxl-standard.en.md