Wie muss wohlgeformte SVG-Konstruktion aussehen?

[Robert B.]

Moin,

BTW: die Breiten- und Höhenangaben des rect-Elements müssen dimensionslose Einheiten sein.

Nein, hier gehst Du wohl vom img-Element in HTML aus. SVG erlaubt die üblichen, auch aus CSS bekannten, Einheiten.

Korrekt. Zitat aus der SVG 1.1-Spezifikation des svg-Elements:

Attribute definitions:

width = "<length>"
For outermost svg elements, the intrinsic width of the SVG document fragment. For embedded ‘svg’ elements, the width of the rectangular region into which the ‘svg’ element is placed. A negative value is an error (see Error processing). A value of zero disables rendering of the element. If the attribute is not specified, the effect is as if a value of 100% were specified.

height = "<length>"
For outermost svg elements, the intrinsic height of the SVG document fragment. For embedded ‘svg’ elements, the height of the rectangular region into which the ‘svg’ element is placed. A negative value is an error (see Error processing). A value of zero disables rendering of the element. If the attribute is not specified, the effect is as if a value of 100% were specified.

Viele Grüße
Robert