A system and method is provided for converting RFID tag information into presence documents and, in particular, a system, topologies and a method is provided for leveraging session initiation protocol (SIP) to integrate RFID tag information into presence documents. The method is implemented in a computing environment, which includes receiving RFID information from a RFID gateway and converting the RFID information into a SIP message. The SIP message is published to a presence server.