Location-aware computing increasingly pervades our everyday lives. Part of the reason for this success is the ubiquitous utility of location information, irrespective of physical environment or application domain. However, this utility is also responsible for the development of many independent and incompatible location-aware systems, which prevent simple migration of entities from one environment to another whilst maintaining a reasonable degree of location-awareness. Achieving ubiquitous location awareness requires uniform system support for future location systems that is flexible and adaptable to differing location modelling needs and the available systems infrastructure.