Absence of mention of XHTML whenever HTML is used for referring to Web page markup

Name: Treasury Board of Canada Secretariat (Common Look and Feel Office)
Email: clf-nsi@tbs-sct.gc.ca
Affiliation: Government of Canada
Document: W2
Item Number: (none selected)
Part of Item: 
Comment Type: general comment
Summary of Issue: Absence of mention of XHTML whenever HTML is used for referring to Web page markup
Comment (Including rationale for any proposed change):
XHTML should be receiving the same level of visibility as HTML but it is noticeably absent  whenever HTML is used for referring to Web page markup.

Proposed Change:
Provide XHTML in addition to HTML for any instances where HTML is used. For instance \"XHTML/HTML\", \"(X)HTML\", \"XHTML and HTML\" could be used.