Entity-Attribute-Value Model

A data model that stores facts as entity-attribute-value triples, so an entity's properties can be listed, typed and queried one attribute at a time.

EAV is the modelling backbone of this site and of Koray Tugberk Gubur's semantic SEO: model the entity as data first, and schema can never contradict the visible text because both render from one record.

term
Entity-Attribute-Value Model
category
optimization
short_def
A data model that stores facts as entity-attribute-value triples, so an entity's properties can be listed, typed and queried one attribute at a time.
long_def
In the EAV model, each fact is a row: which entity, which attribute, what value. It suits sparse, evolving schemas where entities have many possible attributes but each has only some — exactly the shape of a semantic reference. Model the entity as typed attributes first, and every representation (HTML, markdown, JSON-LD, API) renders from that one record.
see_also
knowledge-graph json-ld agentic-seo
etymology_origin
— verify-against-primary-at-build ↗ https://en.wikipedia.org/wiki/Entity%E2%80%93attribute%E2%80%93value_model — long-established database modelling pattern
related_to
knowledge-graph json-ld agentic-seo grounding
contrast_with
Unlike a fixed-column table where every row shares the same attributes, EAV stores one attribute per row, so entities with different, sparse attribute sets fit the same model.
example
Every entry in this Almanac is an EAV record: the protocol 'MCP' is a set of typed attributes (layer, transport, governance_body...) that render identically as a page, a markdown twin and JSON.
source
https://en.wikipedia.org/wiki/Entity%E2%80%93attribute%E2%80%93value_model
status
active
why_it_matters
EAV is the modelling backbone of this site and of Koray Tugberk Gubur's semantic SEO: model the entity as data first, and schema can never contradict the visible text because both render from one record.
sameAs
https://en.wikipedia.org/wiki/Entity%E2%80%93attribute%E2%80%93value_model
bridge_entity
knowledge-graph
last_verified
2026-07-06
md_twin
/glossary/eav-model.md

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