Standard Icon Naming Specification
One of the major components in establishing a look & feel for the desktop is the icon theme. This page describes the proposed standardisation of icon names to use when creating icon themes for desktops and applications which implement the freedesktop.org Icon Naming Specification. This proposed Icon Naming Specification complements the existing freedesktop.org Icon Theme Specification. (docbook2html can be used to convert the xml to a more readable form).
Icon Naming Utilities
To help with the transition to the new naming scheme, Icon Naming Utilities are available. This utility maps the icon names used by the GNOME and KDE desktops to the icon names proposed in the Icon Naming Specification linked above.