[css3-mediaqueries] What does '(scan)' mean?

http://www.w3.org/TR/2007/CR-css3-mediaqueries-20070606/#media1 says:
# Media features, on the other hand, can also be used without a
# value in which case the expression will be true if the media
# feature's value in the output device is different from zero.

It's not clear to me what this means about when (scan) matches,
since the possible values of the feature, 'progressive' and
'interlace', don't seem to have a good comparison function to

It's also a little bit unclear for 'device-aspect-ratio' (and, in
the editor's draft, 'aspect-ratio'), although I presume
(device-aspect-ratio) matches unless the device width is zero.


L. David Baron                                 http://dbaron.org/
Mozilla Corporation                       http://www.mozilla.com/

Received on Sunday, 6 April 2008 18:18:52 UTC