The feature attributes. It is a JSON object that contains a dictionary of name-value pairs. The names are the feature field names. The values are the field values and they can be any of the standard JSON types - string, number and boolean. Note that date values are encoded as numbers. The number represents the number of milliseconds since epoch (January 1, 1970) in UTC.
The feature geometry.
A feature of the map.
Part of the Esri ArcGIS Server REST API. See http://resources.arcgis.com/en/help/rest/apiref/.