This is the Nexus Standard Class Schema. It defines which Nexus Objects can have which Nexus Attributes and the "is - a" relation ship between Nexus Objects. Nexus Object Classes are represented as ComplexTypes. The is-a-relationship is coded into the extension element in the appinfo element. Since Nexus Objects are generic XML objects, AWML can not be validated against this schema. root class of AWS object with a NOL digital obect that is addressable with an URI web page object in space object with often changing position attribute anchor for web pages in space a parking site Virtual Information Tower object that is of interest for tourists object that emits an ID (e.g. infrared beacon) (electronic) doorplate building or part of a building a wall a room a set of rooms a building a level in a building a bar a police station a fire department a hospital an university building a large building hosting shops a train station building a gas station a building hosting events (e.g. theater, ...) a restaurant a hotel a shop a school a theater an opera a cinema a building hosting sports events a congress center a church a bakery a shop selling dresses a shop selling books a shop selling greens a supermarket a shop selling meat an airport terminal a sensor a sensor that reads an ID a sensor that reads a radio frequency identification tag a sensor that reads a radio frequency identification tag a mobile IR beacon reader