The span element is a generic wrapper for phrasing content that by itself does not represent anything.
span = (normal-character-data & common.elem.phrasing*) & span.attrs
span.attrs = common.attrs & common.attrs.aria?
A span element must have both a start tag and an end tag.
The span element is a can be used with attributes such as class, lang/xml:lang, and title to add additional semantics and structure to phrasing content.