in reply to Re^2: _new considered harmful
in thread _new considered harmful

Check with the w3c validator : any xhtml page containing
<a href="foo" target="_blank">
will be dubbed as non valid XHTML strict. Well, actually that's the "target" attribute that's invalid, not "_blank".

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Re^4: _new considered harmful
by ikegami (Patriarch) on Oct 03, 2006 at 15:10 UTC
    It's defined in the Frameset DTD. Frames are valid XHTML, but they have in a seperate DTD since they have affect presentation.
      Interesting. How do you define a frameset that will pass the w3c validator?
        <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">