W3c is your body that attempts to standardize these things, they produce the rules, then programmers compose their rendering motor to interpret Individuals guidelines. But no person keeps you from using Javascript to change the DOM or assigning classes dynamically or simply concatenating styles with your respective programming language. - https://linkingbookmark.com/story19268821/examine-this-report-on-opencart-seo-automatic-google-rich-snippets-json-ld-integration-opengraph-twitter-tags-schema-org