rankprofile[0].name "my_profile"
rankprofile[0].fef.property[0].name "constant(my_tensor).type"
rankprofile[0].fef.property[0].value "tensor(x{},y{})"
rankprofile[0].fef.property[1].name "constant(my_tensor).value"
rankprofile[0].fef.property[1].value "{{x:1,y:2}:1.0,{x:2,y:1}:2.0}"
rankprofile[0].fef.property[2].name "vespa.rank.firstphase"
rankprofile[0].fef.property[2].value "rankingExpression(firstphase)"
rankprofile[0].fef.property[3].name "rankingExpression(firstphase).rankingScript"
rankprofile[0].fef.property[3].value "reduce(constant(my_tensor), sum)"