Does SVGViewSpec track changes to the original SVGSVGElement?

http://www.w3.org/TR/SVG/struct.html#InterfaceSVGSVGElement

Does not make it clear if "currentView" returns an SVGViewSpec object which tracks changes to the original (such as all the SVGAnimated* classes must do: e.g. var width = rect.width; rect.width.baseVal.value = 10; alert(width.baseVal.value); // expect 10), or if it is a normal "plain old data" object which is a copy of what SVGSVGElement had and never changes?

Either way is fine, it just needs to be clarified.  if SVGViewSpec is just a copy of the original and never changes once copied, that's easier to implement.

One possible implementation problem if it tracks changes to SVGSVGElement, is what happens when that SVGSVGElement is removed from the document?  Do then all of the viewPort, targetElement, preserveAspectRatio accessors then go undefined?

var svg = document.getElementById("mysvg");
var currentView = svg.currentView;
var svgParent = svg.parentNode;

svgParent.removeNode(svg);

alert(currentView.targetNode); // does this still work?

One particularly thorny side effect of them *not* changing to undefined is that targetElement could be used to re-insert the SVGSVGElement, example:

svgParent.removeNode(svg);
svgParent.appendNode(currentView.targetNode.ownerSVGElement);

Or equally fun to implement, I assume targetNode should at least update when nodes come and go from the document/change ids?

Just looking for some guidance from you spec folks, thanks.