[GeoNetwork-users] Geonetwork software

Hello, I?m learning about GeoNetwork. I have the map site working now on
ms4w (chameleon) and I want to know wich are the differences between
GeoNetwork and chameleon proyect.
I see Geonetwork have manuals, a friendly interface, but I want to know
about the functionality of GeoNetwork in comparison with chameleon to show
maps, create widgets, etc.

Thank you very much!