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 <?xml version="1.0"?>

 <svg xmlns="http://www.w3.org/2000/svg"

   xmlns:xlink="http://www.w3.org/1999/xlink"

   onload="addTransform()" viewBox="0 0 300 100" class="reftest-wait">

 <!-- Test that the presence/absence of a patternTransform is correctly detected.

      Details are below but, in summary, the first two squares should contain the

      same pattern (a diagonal checkerbox) whilst the third square should contain

      a different pattern (actually the same pattern but WITHOUT the rotation).

      -->

 <script>

 function addTransform()

 {

   var g = document.getElementById("patternBase");

   var list = g.patternTransform.baseVal;

   var t = document.documentElement.createSVGTransform();

   t.setRotate(45,50,50);

   list.appendItem(t);

   document.documentElement.removeAttribute("class");

 }

 </script>

 <defs>

   <!-- 1. The base pattern that will be referenced by others.

        When the document loads, script will add a patternTransform to this

        pattern. It does this using *only SVG DOM APIs* (i.e. not setAttribute)

        so that we can test that when a transform is not specified by markup but

        is added via the DOM we still correctly detect its presence. -->

   <pattern id="patternBase" width="1" height="1">

     <rect width="50" height="50" fill="blue"/>

     <rect x="50" width="50" height="50" fill="red"/>

     <rect y="50" width="50" height="50" fill="red"/>

     <rect x="50" y="50" width="50" height="50" fill="blue"/>

   </pattern>

   <!-- 2. References the base pattern and should detect the base pattern's

        patternTransform (added by script) and inherit it. (SVG 1.1 F2 13.3,

        xlink:href 'Any attributes which are defined on the referenced element

        which are not defined on this element are inherited by this element.').

        Hence this pattern should look IDENTICAL to patternBase. -->

   <pattern xlink:href="#patternBase" id="patternRefWithoutTransform"/>

   <!-- 3. References the base pattern but patternTransform is defined (although

        empty) and hence the patternTransform should NOT be inherited and this

        pattern should look DIFFERENT to patternBase. -->

   <pattern xlink:href="#patternBase" id="patternRefWithTransform"

     patternTransform=""/>

   <!-- The case of a patternTransform being supplied by animation is covered by

        SMIL reftest anim-pattern-attr-presence-01.svg -->

 </defs>

 <rect width="100" height="100" stroke="black"

   fill="url(#patternBase)"/>

 <g transform="translate(100)">

   <rect width="100" height="100" stroke="black"

     fill="url(#patternRefWithoutTransform)"/>

 </g>

 <g transform="translate(200)">

   <rect width="100" height="100" stroke="black"

     fill="url(#patternRefWithTransform)"/>

 </g>

 </svg>