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This tests that XML Namespaces are correctly implemented, in that the tuple of local name and namespace URI, rather than the prefix, is important. The first subtest is a group where the namespace prefix s is bound to the SVG namespace and an s:circle is drawn in pale yellow. The same group declares the default namespace to be a non-SVG naespace; the blue circle element in that namespace must not be drawn.

The second subtest puts the namespace declarations on the elements themselves. The prefix toto is bound to the SVG namespace and the XLink namespace is made the default namespace. Thus, the blue <toto:a href="uri">Valid</toto:a> is a valid link and must be traversable. Select this link, then go back to the test.

The third subtest has no prefix on the element name 'a' and uses the usual xlink: prefix on the href attribute. However, both the default namespace and the namespace bound to the xlink prefix are dummy namespaces. Not only should the link not be traversable, it must not even display at all. If the text 'Invalid' is displayed, the test fails.