Symbolic name consists of alphabetic and numeric characters, the first of which must be alphabetic. All symbolic names are distinct (case sensitive).
alpha123 This_is_a_name _P123_abc_321
Symbolic names are used to identify model objects (sets, parameters, variables, constraints, objectives) and dummy indices.
All symbolic names (except names of dummy indices) must be unique, i.e. the model description must have no objects with the same name. Symbolic names of dummy indices must be unique within the scope, where they are valid.