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