https://amp.dev/documentation/guides-and-tutorials/websites/learn/common_attributes
Common element attributes - amp.dev
AMP provides a set of common attributes that are extended to many AMP components (and HTML elements). This document describes each of the common attributes.
element attributescommonampdev
https://docs.asciidoctor.org/asciidoc/latest/attributes/element-attributes/
Element Attributes | Asciidoctor Docs
A documentation page for AsciiDoc.
element attributesasciidoctor docs