prefix :       <http://example.org/>
prefix xsd:    <http://www.w3.org/2001/XMLSchema#>

:a1 :name  "radius"  ;
    :value 10.1      .

:a2 :value "#FF0000" ;
    :scope "fill"    ;
    :name  "colour"  .

:r1 :attr  :a1, :a2  ;
    :coord :c1       .

:c1 :x     2.0       ;
    :y     4.0       .

:r2 :attr  :a3       ;
    :coord :c2       .

:a3 :name  "radius"  ;
    :value 7.2       .

:c2 :x     0.2       ;
    :y     -2.3      .
