xxx cheatsheet

This page is work in process and should not be relied up on until this notice is removed

Properties (Class Names)

bold {1}	MUST be present exactly once
italic*	OPTIONAL, and MAY occur more than once
+	MUST be present, and MAY occur more than once
?	OPTIONAL, but MUST NOT occur more than once
[square brackets]	list of common values
(parentheses)	data format
#	comment
!	awaiting documentation

Other cheatsheets: hAtom cheatsheet, hCard cheatsheet (also adr cheatsheet + geo cheatsheet), hCalendar cheatsheet, hResume cheatsheet, hReview cheatsheet, PDF cheatsheet