What is a query service and do you have to have ArcServer in order to create a data layer with a query service? Is this the only way to use queries in ArcExplorer Online?
Hi - yes, ArcGIS Server would be required to create a queryable layer. In this context, a query service would refer to a web service that provides map tiles or features as vectors, and when the service is published, the author can choose to allow the service to be queryable - clients can make requests based on specific criteria. This help topic, under 'Queryable layers' tells you how to check to see if an ArcGIS Server map or feature service is queryable: http://help.arcgis.com/en/arcgisexplorer/help/#/About_queries/01560000001z000000/
