Assertion: html | /r/HasProperty | based on sgml
Facets:
Source sentences:
text: The key difference between HTML and XHML is that, HTML is based on SGML while XHTML is based on XML.
text: It is based upon SGML (Standard Generalized Markup Language).
text: The key difference between HTML and XHML is that, HTML is based on SGML while XHTML is based on XML.