"Berners-Lee et al. Future","Feigenbaum et al. Past (2000-2007)","Bernstein et al. Past (2000-2016)","Bernstein et al. Future from 2016"
" intelligent software agents"," - ","  multilingual intelligent  agents "," -"
" (Internet of Things)"," - "," -  ","high volume and velocity of data, e.g., streaming &  sensor data"
" - "," (scalability, efficiency, robust semantic approaches) ","  - "," scale changes drastically"
"(semantic web services)"," - "," - "," -"
"- "," visualization  "," - "," -"
"- "," change management and propagation ","  - "," - "
"- "," (social semantic web, FOAF) "," - "," - "
"- "," - ","  - "," data quality, e.g.,  representation, assessment"