The move from the current compartmentalised systems into an interoperable environment is the central challenge facing digital development this decade. In the quest for a semantic web, new technologies and systems have become available to address a crucial component in the architectural landscape: identification. In particular , it is at the data, rather than just the application, level that interoperability now needs to be advanced. A data level infrastructure with greater potential capabilities than are common today will form the bedrock upon which a new era of digital services can be built. Significantly, such an infrastructure allows the uncoupling of many important facets of information management: ownership, delivery location and the management. By placing identifier management at the heart of systems development and integration, it is possible to build applications that move beyond current compartmentalised restrictions to access externalised lightweight services and content. Su...