[css-transforms-1] Define target coordinate space for transformations on pattern, gradient and clipPath elements. #893

Author: dirkschulze

css-transforms-1/Overview.bs

@@ -746,13 +746,13 @@ Issue(w3c/csswg-drafts#2684): Implementations differ. More testing is required.
 User coordinate space {#svg-user-coordinate-space}
 --------------------------------------------------
 
-For the <{pattern}>, <{linearGradient}>, <{radialGradient}> and <{clipPath}> elements the <a element-attr for>transform</a>, <{pattern/patternTransform}>, <{linearGradient/gradientTransform}> attributes represents values in the current user coordinate system in place at the time when these elements are referenced (i.e., the user coordinate system for the element referencing the <{pattern}> element via a 'fill' or 'stroke' property). Percentage values are relative to the [=reference box=] of the referencing element.
+For the <{pattern}> element, the <{pattern/patternTransform}> attribtue and 'transform' property define an additional transformation in the pattern coordinate system. See <{pattern/patternUnits}> attribute for details [[!SVG2]].
 
-In particular the <{pattern/patternUnits}>, <{linearGradient/gradientUnits}> and <{mask/maskUnits}> attributes don't affect the user coordinate system used for transformations [[SVG11]].
+For the <{linearGradient}> and <{radialGradient}> elements, the <{linearGradient/gradientTransform}> attribtue and 'transform' property define an additional transformation in the gradient coordinate system. See <{linearGradient/gradientUnits}> attribute for details [[!SVG2]].
 
-For all other [=transformable elements=] the <a element-attr for>transform</a> attribute represents values in the current user coordinate system of the parent. All percentage values of the <a element-attr for>transform</a> attribute are relative to the element's [=reference box=].
+For the <{clipPath}> element, the <a element-attr for>transform</a> attribtue and 'transform' property define an additional transformation in the clipping path coordinate space. See <{clipPath/clipPathUnits}> attribute for details [[!CSS-MASKING]].
 
-Issue(w3c/csswg-drafts#893): User coordinate space statement breaks SVG.
+For all other [=transformable elements=] the <a element-attr for>transform</a> attribute and 'transform' property define a transformation in the current user coordinate system of the parent. All percentage values of the <a element-attr for>transform</a> attribute are relative to the element's [=reference box=].
 
 <div class="example">