[current]
It appears the FOA book I linked some time ago is actually are very good resource on all this 'semantic search' stuff:
FOA: 6.5.2 Spreading activation search, which is an approach that is so similar to 'Contextual Network Graphs' that the authors of the latter now
feel like they 're-invented the wheel' ;)
[ by Martin>]
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similar entries (cg):