Structured data
Machine-readable annotations on a page, usually Schema.org vocabulary in JSON-LD, that describe entities and make pages eligible for rich…
TechnicalRDFa Lite
RDFa
A W3C attribute syntax (vocab, typeof, property) for embedding RDF-based structured data in HTML; supported by Google but rarely used for new work.
In full
RDFa Lite is the simplified profile most commonly encountered, and like microdata it annotates visible markup in place. It predates JSON-LD's dominance and survives mostly in older CMS themes and in publishing workflows tied to RDF toolchains. Google parses it, but documentation and tooling in the SEO ecosystem centre on JSON-LD.
Example
An older Drupal theme outputs `<div vocab="https://schema.org/" typeof="Article" property="headline">` markup.
Related terms
Microdata
An HTML attribute-based syntax (itemscope, itemtype, itemprop) for embedding structured data directly in visible markup.
JSON-LD
A W3C-standard JSON syntax for linked data, embedded in a `<script type="application/ld+json">` block; Google's recommended structured…
Schema.org
A collaborative vocabulary of types and properties for structured data on the web, founded by Google, Microsoft, Yahoo and Yandex in 2011.
Entity
A distinct, uniquely identifiable thing — a person, place, organisation, product or concept — that a search engine can reason about…
Where to read more
- Intro to How Structured Data Markup Works · Documentation · developers.google.com
- Schema.org Getting Started Guide · Documentation · schema.org