Note that there's overlap between the different deliverables (Architecure, Thing Description, Discovery).
Architectural Requirements, Use Cases, and Vocabulary (Architecture) Understand and describe requirements of new use cases, architectural patterns, and concepts.
Link Relation Types: (Architecture, Thing Description) Define link relation types for specific relationships.
Thing Models (previously known as Thing Description Templates): (Architecture, Profile, Thing Description) Define a mechanism to describe classes of things and an inheritance mechanism. and define how Thing Descriptions can defined in a modular way.
Complex Interactions: (Architecture, Thing Description, Profile) Document how hypermedia controls can be used to describe complex interactions and thing behaviour.
Discovery: Define terminology.
Lifecycle: (Architecture) Terminology for states and transitions for products, devices, and information.
Onboarding: (Architecture, Discovery) Define how trust can be established between Things, gateways, and servers and how security configurations and provisioning can be established.
Identifier Management: (Architecture, Discovery) Mitigate privacy risks by defining how identifiers are managed and updated.