HTML
element
tags]]: standard
HTML
tags
link tag
for relation between document and the
canonical url
Web Page Metadata - Json-Ld syntax
PageMaps
: invisible blocks of XML that add metadata to pages.
Microformats: tags used to mark up visible page content along predefined types.
RDFa
: an alternate standard for marking up visible page content along arbitrary types.
Microdata
: a new HTML5 standard for marking up visible page content.
Page Date
: features on a page indicating its date
Resource Description Framework (RDF)
Google Search
supports only (
Ref
):
Web Page Metadata - Json-Ld syntax
Microdata
RDFa
See also
The web almanach
Protocol / Vocabulary
Schema.org
- Google
Open Graph (Tag|Protocol) - Ogp
- Facebook
Web Page Metadata - Dublin Core Syntax
Social Media
Social media uses metadata also to style the card that are used to embed link to a website.Example:
Twitter
facebook
Test / Validator
https://search.google.com/structured-data/testing-tool
. Example
Wikipedia page
https://search.google.com/test/rich-results
Documentation / Reference
What features are best for my page or site?
https://developers.google.com/search/docs/guides/intro-structured-data
Google Structured data by page type - left menu
Learn - course