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Microsoft has proposed an identity metasystem to standardize identity services and the principles behind them. A location metasystem can support interoperation between location services, protect users' privacy and handle issues of granularity. The simple OAuth protocol may be a good model for working towards a location metasystem.doi:10.1145/1507136.1507140 dblp:conf/locweb/Doty09 fatcat:533uswjbu5fg7n7v7y2gwvbj3u