Opera supports object , but not the attributes align , classid , codebase , codetype , data and standby . The deprecated hr noshade attribute has no effect, neither does the deprecated attribute compact . The elements del and ins when used inline may start a new block CSS support Opera 4.02 supports all of CSS1 . XML support Opera 4.02 can parse and display XML documents. In order to display an XML document, a CSS style sheet must be present.
Authors can attach style sheets to their XML documents through a processing instruction.
If no style sheet is present, Opera 4.0 will use the initial values on all CSS propoerties to display the document. All elements will be inline, and all text will be rendered in the same font. XSL and XSLT Opera does not support XSL formatting objects and neither does it natively support XSLT transformations. XML documents transformed server side will be parsed and displayed by Opera just like any other XML document. Opera 4.02 supports XML namespaces .