A.11. Inkscape SVG Extensions

To conclude this necessary but very superficial appendix, let's compile a list of the most important extension elements and attributes that you will see in Inkscape SVG files. Some of them were already discussed in previous sections; others deserve a brief treatment here.

One point bears repeating: None of these additional elements and attributes make Inkscape documents invalid SVG. The X in "XML" stands for "eXtensible" for a reason: The ability to freely mix different vocabularies was one of the goals of XML from the very beginning. In our case, this means that any Inkscape SVG file must—and does—render absolutely the same in all compliant SVG renderers. (There's a single unfortunate exception from this rule, which we discuss in Section 15.2.2.3.)