Context Menu: A must-have recommendation

The dynamic properties of the SVG image requires this consistent UI
for viewing and navigation.
Any viewer of any image can right-click and be confident they will get:
1. zoom in
2. zoom out
3. original view

Adopting the  Adobe SVG Viewer context menu structure and format
should be relatively easy for all browsers to accept. Its structure is
simple, and easy to customize.
See: http://wiki.svg.org/index.php/Context_Menu_Customization

Because all browsers are familiar with handling a context menu, this
menu element could realistically be a recommendation by W3C, rather
than a suggestion.

Regards,
Francis