2TYPE: bool/null
3DEFAULT: null
4VERSION: 4.0.0
6If null, class will auto-detect the doctype and, if matching XHTML 1.1 or
7XHTML 2.0, will use the restrictive NMTOKENS specification of class. Otherwise,
8it will use a relaxed CDATA definition.  If true, the relaxed CDATA definition
9is forced; if false, the NMTOKENS definition is forced.  To get behavior
10of HTML Purifier prior to 4.0.0, set this directive to false.
12Some rational behind the auto-detection:
13in previous versions of HTML Purifier, it was assumed that the form of
14class was NMTOKENS, as specified by the XHTML Modularization (representing
15XHTML 1.1 and XHTML 2.0).  The DTDs for HTML 4.01 and XHTML 1.0, however
16specify class as CDATA.  HTML 5 effectively defines it as CDATA, but
17with the additional constraint that each name should be unique (this is not
18explicitly outlined in previous specifications).
19--# vim: et sw=4 sts=4