In LEXUS sort orders are used to sort entries of your lexicon. Their structure consists of sort rules, each one composed by two elements: Start Letter and Character that by default have been predefined with the Latin alphabet. The position of a rule in the rules list determines the sorting position. Start Letter is the symbol used to represent all the "characters" presented in the Characters column of a given rule. It determines where the entries starting with the characters specified in the Characters column will be placed.

In LEXUS you can create sort orders which are language specific. For every data category you can indicate which sort order you want to apply to it. In general, the process of sorting consists of two steps: first create a sort order and then apply it to a data category. This operation takes place in the Schema and View Editor.