Custom XML namespace
OptionalclassA space-separated list of the classes of the element. Classes allows CSS and JavaScript to select and access specific elements via the class selectors or functions like the method Document.getElementsByClassName().
OptionaldirAn enumerated attribute indicating the directionality of the element's text.
OptionalidThe id global attribute defines a unique identifier (ID) which must be unique in the whole document.
OptionallangHelps define the language of an element: the language that non-editable elements are in, or the language that editable elements should be written in by the user.
OptionalprefixOpen-graph protocol prefix.
OptionalstyleContains CSS styling declarations to be applied to the element.
OptionaltranslateAn enumerated attribute that is used to specify whether an element's attribute values and the values of its Text node children are to be translated when the page is localized, or whether to leave them unchanged.
OptionalxmlnsXML namespace
From T, pick a set of properties whose keys are in the union K