{ name: "idtype", type: "string", optional: true, "default": null }, // can be "upc", "brand,model", "brand,partnum"; required if catalogid is not specified
{ name: "idvalue", type: "string", optional: true, "default": null }, // required if catalogid is not specified
{ name: "sort", type: "string", optional: true }, // can be "price_ascending", "price_descending", "userrating_ascending", "userrating_descending"; omitted, the default is to sort by relevance