{ "items" : [
    { "id" : "http://dbpedia.org/resource/Preferred_number"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "In industrial design, preferred numbers (also called preferred values or preferred series) are standard guidelines for choosing exact product dimensions within a given set of constraints. Product developers must choose numerous lengths, distances, diameters, volumes, and other characteristic quantities."] } } }
