[media type] without DOCTYPE and xmlns [text/html] recognized as HTML [application/xhtml+xml] recognized as XML, XHTML-specific semantics were not recognized but the type selector in style sheets matched case-insensitively and inline style (incorrectly) worked [text/xml] recognized as XML, XHTML-specific semantics were not recognized but the type selector in style sheets matched case-insensitively and inline style (incorrectly) worked [application/xml] 
recognized as XML, XHTML-specific semantics were not recognized but the type selector in style sheets matched case-insensitively and inline style (incorrectly) worked