i1 : DIV{"hi there", HR{}, "ho there" } o1 = hi there---------------------------------------------------------------- --------ho there
i2 : html oo o2 = <div> hi there <hr> ho there</div>
The object HR is a markup type, with ancestor classes HypertextVoid (missing documentation) < Hypertext < BasicList < Thing.
The source of this document is in Text.m2:726:0.