2.1.3 [SVG1.1:2011] Section 7.11, Object bounding box units

V0003:

The specification states:

 Element: 'filter' 
  
 Attribute: ‘filterUnits’
  
 Effect: Indicates that the attributes which define the filter effects region (x, y, width, height) represent fractions or percentages of the bounding box of the element to which the filter is applied.

IE9 Mode (All Versions)

The filter element and the filterUnits attribute are not supported.

V0006:

The specification states:

 Element:   'mask'
 Attribute:  primitiveUnits="objectBoundingBox"
 Effect:   Indicates that the various length values within the filter primitives represent fractions or percentages of the bounding box of the element to which the filter is applied.

IE9 Mode (All Versions)

The filter element and the primitiveUnits attribute are not supported.