9. A system including: at least one processor; a value generator module that is executable by the at least one processor to receive an aspect and a request from a user, the aspect used to describe a data item and the request to solicit at least one candidate value to associate with the aspect; a string analyzer module that is executable by the at least one processor to identify a string of text in a database based on the aspect, wherein the string analyzer module identifies the aspect in the string of text, wherein the string analyzer module identifies a synonym of the aspect in the string of text, wherein the string identifier module identifies an acronym of the aspect in the string of text, and wherein the string identifier module identifies an alternate spelling of the aspect in the string of text, the database is a sample of data items from a first database that is utilized by a plurality of buyers and a plurality of sellers that utilize a network-based marketplace, the sample of data items includes a seasonal sample; the string analyzer module to analyze the string of text based on the aspect to identify at least one candidate value in the string of text, the at least one candidate value to include a first candidate value that is selected; a value generator module to communicate the at least one candidate value to a user; a processing module to receive a rule that includes an aspect-value pair that includes the aspect and the first candidate value; and a network-based marketplace to publish the rule in a production environment on the network-based marketplace, the network-based marketplace further to associate the aspect-value pair to a first data item responsive to the publication of the rule, the network-based marketplace to concatenate the aspect-value pair to the first data item responsive to an identification of the first candidate value in the first data item to generate a first data item that includes the concatenated aspect-value pair; the network-based marketplace to further receive a first query, the network-based marketplace to associate the aspect-value pair to the query, based on the rule; the network-based marketplace to identify the first data item that includes the concatenated aspect-value pair for inclusion in an interface based on the association of the aspect-value pair to the first query based on the first rule; a dictionary publisher module to receive a request to publish a dictionary for a particular domain in a preview environment in the network-based marketplace; wherein the preview environment is utilized to test a rule before the rule is applied to at least one of the first data item and the first query in a production environment; and wherein the dictionary includes a plurality of domain rules that are utilized to associate a first category on the network-based marketplace with a first product type, and wherein the first category and the first product type are further associated with the first data item that is for sale on the network-based marketplace.
13. The system of claim 9 , wherein the rule includes a condition clause that is utilized to identify the first candidate value in the first query and a predicate clause that includes the aspect- value pair.