amalgame/commit

make sure rdf literals in evidence are really literals

diff --git a/lib/amalgame/edoal.pl b/lib/amalgame/edoal.pl
index e351919..c090999 100644
--- a/lib/amalgame/edoal.pl
+++ b/lib/amalgame/edoal.pl
@@ -153,7 +153,8 @@ assert_prov_elem(user, User, Subject, Graph, _Options) :-
 
 assert_prov_elem(Key, Value, Subject, Graph, _Options) :-
 	rdf_global_id(amalgame:Key, Property),
-	rdf_assert(Subject, Property, literal(Value), Graph).
+	term_to_atom(Value, ValueTxt),
+	rdf_assert(Subject, Property, literal(ValueTxt), Graph).
 
 rdf_assert_triples([], _).
 rdf_assert_triples([rdf(S,P,O)|Tail], Graph) :-