Use HTML and XHTML according to their respective specifications. <dt> elements should be inside a <dl> element. They should precede a <dd> or <dt> element
Engine scans for dt elements whose previous sibling is not a <dd> or <dt> element and which are not the child of a <dl> element
Not using HTML according to the specification leads to confusion for user agents and assistive technologies that rely on correct semantic information to present a coherent representation of the page.