"Berners-Lee et al. Future","Feigenbaum et al. Past (2000-2007)","Bernstein et al. Past (2000-2016)","Bernstein et al. Future from 2016"
"knowledge representation languages and standards","knowledge representation languages and standards "," knowledge representation  languages and standards "," representing lightweight  semantics "
"ontologies and modeling,  taxonomies, vocabularies "," ontologies and modeling,  taxonomies, vocabularies "," ontologies and modeling,  (PR) knowledge graphs "," - "
"logic and reasoning "," logic and reasoning "," logic and reasoning "," - "
"search and question answering "," (ranking) ","  (PR) question answering systems "," - " 
"(data integration) ","  (ontology matching)  "," (PR) needs-based,  lightweight data integration "," integration of heterogeneous data "
"proof & trust "," privacy, trust,  access control "," personal information,  privacy "," trust & data provenance  (representation, assessment) "
"databases "," semantic web databases "," database management  systems "," - "
"decentralization "," (decentralization) "," vastly distributed  heterogeneous data "," (decentralization)"
"(machine learning, prediction, analysis, automatic report) "," knowledge extraction and discovery "," latent semantics,  knowledge acquisition,  ontology learning "," - "
" - "," query language (SPARQL) "," developing efficient query mechanisms "," - "
" - "," (linked data, DBpedia) "," (PR) linked data  (open government data),  (social data) "," - "