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0001 Attr.ClassUseCDATA
0002 TYPE: bool/null
0003 DEFAULT: null
0004 VERSION: 4.0.0
0005 --DESCRIPTION--
0006 If null, class will auto-detect the doctype and, if matching XHTML 1.1 or
0007 XHTML 2.0, will use the restrictive NMTOKENS specification of class. Otherwise,
0008 it will use a relaxed CDATA definition.  If true, the relaxed CDATA definition
0009 is forced; if false, the NMTOKENS definition is forced.  To get behavior
0010 of HTML Purifier prior to 4.0.0, set this directive to false.
0011 
0012 Some rational behind the auto-detection:
0013 in previous versions of HTML Purifier, it was assumed that the form of
0014 class was NMTOKENS, as specified by the XHTML Modularization (representing
0015 XHTML 1.1 and XHTML 2.0).  The DTDs for HTML 4.01 and XHTML 1.0, however
0016 specify class as CDATA.  HTML 5 effectively defines it as CDATA, but
0017 with the additional constraint that each name should be unique (this is not
0018 explicitly outlined in previous specifications).
0019 --# vim: et sw=4 sts=4