Coupled to a particular syntax. If you wish to describe your articles in HTML documents with this type of vocabulary, you may use the syntaxes RDFa and/or Microdata. Phase 4: The module installation approach is really easy, how module configuration is effective can be seen from the demo instance. In https://www.presta-addons-modules.com/en/opencart-seo-automatic-google-rich-snippets-json-ld-integration-opengraph-twitter-tags-schemaorg.html