GBOK
Knowledge architecture
GBOK’s architecture has two parts: a five-tier hierarchy that locates knowledge precisely, and four separated architecture layers. Everything here is from a controlled working draft and is labelled in development.
The five-tier hierarchy
Each tier nests inside the one above it, so any unit of knowledge has a stable, addressable place.
Tier 1 of 5: GBOK
The whole body of knowledge.
Tier 2 of 5: Knowledge Family
A major field. Founding family: the Digital Built Environment.
Tier 3 of 5: Domain
A coherent area within a family. Domain 1: Digital Built Environment Foundations.
Tier 4 of 5: Chapter
A governed unit of knowledge within a domain.
Tier 5 of 5: Section
The smallest addressable unit within a chapter.
Four architecture layers
These four layers are developed and governed separately, and are never merged. Select a layer to read what it is — and what it is deliberately not.
Organises what professionals should understand — the structured body of knowledge itself, from families down to sections.
Kept distinct from: Knowledge is not competence; understanding a topic is not the same as performing in practice.
Describes observable performance, judgement and responsibility — how knowledge is applied in real professional contexts.
Kept distinct from: Competence is not a certificate; demonstrating capability is not the same as holding a credential.
Defines how competence could be assessed and recognised across levels, independently of any single publication.
Kept distinct from: Certification is not derived from a book’s table of contents, and none is operational today.
Keeps the other three layers accountable — change control, versioning, review and institutional identity.
Kept distinct from: Governance is not the knowledge itself; it is the discipline that makes the knowledge trustworthy.