1 Scope
This document defines key terms for postal addressing, postal address components and constraints on their use.
Specifically, this document defines postal address components organized into three hierarchical levels:
— elements , such as organization name or postcode, which have well-defined conceptual meaning and are not themselves made up of subordinate components , though they may be sub-divided for technical purposes;
— constructs , such as organization identification, which group elements into units form a logical portion of a postal address ;
— segments , such as addressee specification, which group-related postal address constructs and/or postal address elements into units with a specific defined function.
This document also specifies a mechanism for creation of sub-elements , which correspond to either sub-divisions of element content, such as door type or door indicator or to multiple occurrences and locations of elements in an address , such as l...