either unchangeable or changeable according to fixed rules, that is, endowed with bounded variability. [Archives] 
n., A set of rules and guidelines co-operatively adhered to by national and international peer entities. [General Dictionaries] 
n., The complex of established norms aiming to make the characteristic of a product, process, or service uniform within or across a sector, a country, or a system. [Archives] 
n., Established principle, rule, guide or measure. [Arts] 
n., A publicly available definiti