KML is a file format used to display geographic data in an Earth browser such as Google Earth, Google Maps, and Google Maps for mobile.
KML uses a tag-based structure with nested elements and attributes and is based on the XML standard. All tags are case-sensitive and must be appear exactly as they are listed in the KML 2.2 Reference. The Reference indicates which tags are optional. Within a given element, tags must appear in the order shown in the Reference.
Radio Mobile can import an export in the .KML file format.
A full description of the KML file format can be found at Google http://code.google.com/apis/kml/documentation/
Here is a .KML example file as exported from Radio Mobile.