OptionaldescriptionA detailed description of the template.
OptionaldrawingAn optional string that can define a client-side drawing tool to be used with this feature. See the web map specification for more details.
OptionalnameA string containing a user-friendly name for the template. This name could appear on a menu of feature choices displayed in the client editing environment.
OptionalprototypeA feature object representing a prototypical feature for the template.
Templates describe features that can be created in a layer. Templates are used with map notes, other feature collections, and editable web-based CSV layers. They are not used with ArcGIS feature services, which already have feature templates defined in the service.
Templates are defined as a property of the layer definition when there are no types defined; otherwise, templates are defined as properties of the types.
See https://developers.arcgis.com/web-map-specification/objects/template/ https://developers.arcgis.com/web-scene-specification/objects/template/.