This schema defines Garmin extensions to be used with the GPX 1.1 schema. The root element defined by this schema is intended to be used as a child element of the "extensions" elements in the wpt element in the GPX 1.1 schema. The GPX 1.1 schema is available at http://www.topografix.com/GPX/1/1/gpx.xsd. This type contains data fields available in Garmin GDB waypoints that cannot be represented in waypoints in GPX 1.1 instances. Same as creation timestamp. Date and time are in Univeral Coordinated Time (UTC), not local time. Conforms to ISO 8601 specification for date/time representation. Fractional seconds are allowed for millisecond timing in tracklogs. This type contains a list of categories to which a waypoint has been assigned. Note that this list may contain categories which do not exist for a particular application installation. Category provides the ability to specify the type of a phone number. For example, a phone number can be categorized as "Home", "Work", "Mobile" e.t.c This type contains a temperature value measured in degrees Celsius. This type contains a distance value measured in meters. This type contains a string that specifies how a waypoint should be displayed on a map. This type provides the ability to extend any data type that includes it.