Re: Parse new SVG Transform presentation attributes with "SVG parsing rules"

Hi - I've been implementing CSS3 calc() in WebKit.

calc() as specced (http://www.w3.org/TR/css3-values/#calc) does not support
unitless lengths :

  "The resolved type must be valid for where the expression is placed;
otherwise, the expression is invalid. The resolved type of the expression
is determined by the types of the values it contains. NUMBER tokens are of
type ‘<number>’ [...] At ‘+’, or ‘-’, check that both sides have the same
type; resolve to that type."

The WebKit implementation was done to this spec. Requiring units in calc()
does not break any existing content, since there isn't any.

    mike