SVG 1.1 spec says that:

http://www.w3.org/TR/SVG11/struct.html#URIReference
5.3 References and the 'defs' element

5.3.1 Overview:

*the 'use' element can reference any local or non-local resource

http://www.w3.org/TR/SVG11/struct.html#ImageElement
Section 5.7 The 'image' element:

*Unlike 'use' , the 'image' element cannot reference elements within an SVG file.


So... I imagine that the 'use' element should allow me to reference elements within an external SVG (i.e. a non-local resource)

but I try to do that and I get nothing! Any clue on that?

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This is my use.svg file:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg xmlns:svg="http://www.w3.org/2000/svg ">
  <use xlink:href="file:///home/aluno/Desktop/circle.svg" />
</svg>

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This is my circle.svg file:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg xmlns="http://www.w3.org/2000/svg">
  <circle id="mycircle" cx="300" cy="225" r="150" fill="red"/>
</svg>