Note that CData can _only_ be used what HTML calls foreign content. So `<math><![CDATA[x<y]]></math>` will print x<7, but `<p><![CDATA[x<y]]></p>` will emit a

Note that CData can _only_ be used what HTML calls foreign content. So `<math><![CDATA[x<y]]></math>` will print x<7, but `<p><![CDATA[x<y]]></p>` will emit a `cdata-in-html-content` parse error (your compliant HTML parser is allowed to give up here if it's lazy) and is parsed as `<p><!--[CDATA[x<y]]--></p>` (your HTML parser will actually do this because giving up leads to poor user experience when no one else does)