Sr. No Middleware Context Inter-operability Communication Model Perf. Evaluation Capacity Scalability Reliability Security Cost Latency Realtime data 1 aware middleware x X x x x x x x x X 2 Object based Middleware X X X x x x x x x x 3 Scalable data middleware Distributed x x x X X x x X X X 4 Object based middleware x x x x X x x X x x 5 Green Middleware Service X x x X X x X x x x 6 Oriented Middleware X X X x x x X x x X 7 Data centric middleware x X x x X X X X X X 8 Semantic middleware X X X x x x X x X x 9 Smart semantic middleware X X X x X x X x x X 10 CDAX x X x x X X X x x x 11 Realtime middleware x x x x x x x x x X 12 Middleware for WSNs x X X x X X x x x x 13 Universal Middleware x X X x x x x X x X 14 DDS X X X X X X X X X X

Table 2: Comparative study of middlewares addressing certain parameters.