I have started a contribution collection for nodes required to work with Impinj ItemIntelligence platform.
Impinj provides this IoT platform based on RAIN RFID, (Gen2 UHF tags) and has a special type of reader (xArray) that can give the x,y,z location for a specific tag in the field.
ItemSense is another product of Impinj that encapsulates connecting and discovering RFID tags into RESTful calls and AMQP messages. more information is available
here.