Derive simple information about Obama
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Suppose we have a triplet
http://en.wikipedia.org/wiki/Barack_Obama, id:type, http://conceptnet5.media.mit.edu/web/c/en/person
then we encode it in the otter format like this:
rdf("http://en.wikipedia.org/wiki/Barack_Obama", "id:type", "http://conceptnet5.media.mit.edu/web/c/en/person").
and then we add three handmade common-sense taxonomy rules:
-rdf(X,"id:type", "http://conceptnet5.media.mit.edu/web/c/en/person") | rdf(X,"id:type", "http://conceptnet5.media.mit.edu/web/c/en/animal"). -rdf(X,"id:type", "http://conceptnet5.media.mit.edu/web/c/en/animal") | rdf(X,"id:type", "mortal"). -rdf(X,"id:type", "http://conceptnet5.media.mit.edu/web/c/en/person") | rdf(X,"id:CapableOf", "id:eat").
The whole problem obama1.txt with the strategy selection and everything, ready to run:
% clear automatic strategy selection clear(auto). % use capital letters (A,X,T,...) as vars set(prolog_style_variables). % select the search strategy set(hyper_res). % an alternative is to use set(binary_res). set(factor). % select sensible amount of output clear(print_given). % uncomment to see input and process set(print_kept). % this is important: prints all generated and kept clauses assign(stats_level, 0). % just make it stop after N secs assign(max_seconds, 10). list(sos). % example data rdf("http://en.wikipedia.org/wiki/Barack_Obama", "id:type", "http://conceptnet5.media.mit.edu/web/c/en/person"). % some simple taxonomy rules of the form A->B i.e. -A | B in clause form. -rdf(X,"id:type", "http://conceptnet5.media.mit.edu/web/c/en/person") | rdf(X,"id:type", "http://conceptnet5.media.mit.edu/web/c/en/animal"). -rdf(X,"id:type", "http://conceptnet5.media.mit.edu/web/c/en/animal") | rdf(X,"id:type", "mortal"). -rdf(X,"id:type", "http://conceptnet5.media.mit.edu/web/c/en/person") | rdf(X,"id:CapableOf", "id:eat"). end_of_list.
Just send it to otter via standard inpt:
otter < obama1.txt
and look at the **KEPT lines in output.
It is a good idea to send the output to a file and then process it later, like this:
otter < obama1.txt > obama1.out