An SVG feature appearing for the first time in Firefox 15 is support for SVG Fragment Identifier linking. This feature allows authors to display different parts of an SVG image by specifying a different fragment identifier on the end of the URL.
The Firefox 15 implementation also includes support for the view element which is basically a predefined fragment identifier. It does not however, support XPointer style fragment identifiers.
One use case for fragment identifers could be an SVG document with a set of sprites arranged in a grid. Fragment identifiers could then be used to display one or more of those images on another html or svg page.
Here’s an example that shows Fragment Identifier Linking in action
Longsonr's Weblog 
Posted by Better SVG Sprites With Fragment Identifiers - Broken Links on August 14, 2012 at 3:15 pm
[…] first read about SVG Fragment Identifiers on Robert Longson’s blog. The SVG spec has further details (including extra parameters). If you […]