Element “frameset” is not supported from visual studio 2010
问题 I have a plain html file like this: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title></title> </head> <frameset rows="*"> <frame name="inner" src="inner.htm" /> </frameset> </html> In visual studio 2010 I get warnings "(XHTML 1.0 Transitional): Element 'body' occurs too few times" and "(XHTML 1.0 Transitional): Element 'frameset' is not supported.". However the w3c