---
title: Semantic Web
kind: note
description: Formats JSON-LD Microdata , , , , , Wikipedia) RDFa microformats I would argue that the semantic HTML tags ( , , etc.) are a kind of format Vocabularies microformats schema.org established by search…
words: 63
readingMinutes: 1
created: '2022-12-27T00:00:00.000Z'
updated: '2024-07-29T20:23:30+02:00'
---
## Formats
- [JSON-LD](https://www.w3.org/TR/json-ld11/)
- [Microdata](https://html.spec.whatwg.org/multipage/microdata.html)
  - `itemscope`, `itemtype`, `itemid`, `itemprop`, `itemref`, `datetime`
  - [Wikipedia](https://en.wikipedia.org/wiki/Microdata_(HTML))
- [RDFa](https://www.w3.org/TR/rdfa-primer/)
- [microformats](http://microformats.org/)
- I would argue that the [semantic HTML](https://en.wikipedia.org/wiki/Semantic_HTML) tags (`article`, `time`, `meter` etc.) are a kind of format
## Vocabularies
- [microformats](http://microformats.org/)
- [schema.org](https://schema.org/)
  - established by search engine operators Google, Microsoft, Yahoo!, and Yandex
  - [The only vocabulary interpreted by Google](https://developers.google.com/search/blog/2020/01/data-vocabulary)
  - [Development version](https://webschemas.org/)
### Resources
- [RDFa predefined vocabularies](https://www.w3.org/2011/rdfa-context/rdfa-1.1)
- [Linked Open Vocabularies](https://lov.linkeddata.es/dataset/lov)
  > they collect and index open vocabularies
	- [Source](https://stackoverflow.com/questions/12095945/knowing-what-rdfa-vocabulary-to-use/12098901#12098901)