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Where to learn the vocabulary

A short section: courses on the knowledge layer, the terms those courses are sold under, and a free glossary that defines the vocabulary the rest of the site assumes.

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How to read this page

What is free, and what is not

Everything on this site stays free to read — not-for-profit, no fee, no ads. The courses are the one paid item; their terms sit on a page of their own so the boundary is stated once and plainly.

For agents & crawlers

Machine-readable indexes for this site: agents.md (structured topic/form/convention index) · llms.txt (site index). Agent-oriented pages: A2A · Agents · MCP. Sitemap: sitemap.xml.

In this section

Courses

The paid part of this site, and the terms it is sold under.

  • Courses — courses on the knowledge layer for Agentic AI; the site itself stays free to read.
  • Course terms — what stays free on this site, the licence on course material, and the terms of sale.

Reference

Free to read, like everything else here.

  • Glossary — definitions for the vocabulary of a knowledge layer: data to wisdom, representation, provenance and currentness, agents and protocols.
The pages of this sectionThe pages of this section — drawn from the site's own internal links. CoursesCCourses Course termsCCourse terms GlossaryRGlossary
All 3 pages listed below, drawn from the links between them. Letters mark the group: C Courses · R Reference. A page is larger when more links inside this figure touch it. Links from the shared header and footer are excluded, so what is drawn is editorial: a page pointing at another page.

FAQ

Yes. Everything on this site is free to read — not-for-profit, no fee, no ads, no tracking. The courses are the one paid item, and Course terms states what stays free and what the licence on course material is.

No. Every page here stands on its own and nothing is gated. The courses exist for people who want the material taught in sequence rather than read.

The vocabulary the rest of the site assumes: data to wisdom, representation and formats, provenance and currentness, agents and protocols. Where a term has a published definition behind it, the glossary says which specification it comes from.

Sources

The glossary rests on published definitions rather than on this site's usage. The specifications behind those terms:

  1. SKOS Simple Knowledge Organization System Reference — W3C Recommendation. Concept schemes and thesaurus relations.
  2. PROV-O: The PROV Ontology — W3C Recommendation. Provenance.
  3. Model Context Protocol documentation — the tool and context interface.
  4. Open Knowledge Format (OKF) specification — a published concept-bundle format.