1 <svg version=
"1.1" xmlns=
"http://www.w3.org/2000/svg" xmlns:
xlink=
"http://www.w3.org/1999/xlink" width=
"250" height=
"250">
2 <!-- You should see 4 rects with the same size, filled with green and a fill opacity of 0.5 -->
4 <mask id=
"mask1" maskUnits=
"userSpaceOnUse" maskContentUnits=
"userSpaceOnUse" x=
"10" y=
"10" width=
"100" height=
"100">
5 <rect x=
"60" y=
"60" width=
"20%" height=
"50" fill-opacity=
"0.5" fill=
"white"/>
7 <mask id=
"mask2" maskUnits=
"objectBoundingBox" maskContentUnits=
"objectBoundingBox">
8 <rect x=
"0.5" y=
"0.2%" width=
"50%" height=
"0.5" fill-opacity=
"0.5" fill=
"white"/>
10 <mask id=
"mask3" maskUnits=
"objectBoundingBox" maskContentUnits=
"userSpaceOnUse" y=
"50%">
11 <rect x=
"24%" y=
"170" width=
"20%" height=
"50" fill-opacity=
"0.5" fill=
"white"/>
13 <mask id=
"mask4" maskUnits=
"userSpaceOnUse" maskContentUnits=
"objectBoundingBox" x=
"120" y=
"120" width=
"100" height=
"100">
14 <rect x=
"0.5" y=
"0.2%" width=
"0.5" height=
"0.2%" fill-opacity=
"0.5" fill=
"white"/>
17 <rect x=
"10" y=
"10" width=
"100" height=
"100" fill=
"green" mask=
"url(#mask1)"/>
18 <rect x=
"120" y=
"10" width=
"100" height=
"100" fill=
"green" mask=
"url(#mask2)"/>
19 <rect x=
"10" y=
"120" width=
"100" height=
"100" fill=
"green" mask=
"url(#mask3)"/>
20 <rect x=
"120" y=
"120" width=
"100" height=
"100" fill=
"green" mask=
"url(#mask4)"/>