Z39.50 Unit Definitions

August 2000

In the ASN.1 definition of Unit: 

  Unit ::= SEQUENCE{
     unitSystem      [1] InternationalString OPTIONAL,
     unitType        [2] StringOrNumeric OPTIONAL, 
     unit            [3] StringOrNumeric OPTIONAL, 
     scaleFactor     [4] IMPLICIT INTEGER OPTIONAL}

A "Z39.50 Unit Definition" specifies values for unitType and unit when unitSystem is 'z3950'.

Following are approved definitions:

  1. unitType = 'iso4217-1995'
    • unit = currency code from ISO 4217-1995
    Note: Changed August 2000 from "1990" to "1995"; change approved at July 2000 ZIG meeting.

  2. unitType = 'coordinate'
    • unit = 'decimal degrees - WGS84' (World geodetic system, 1984)

  3. unitType = 'information unit'
    • unit = 'byte'
    • unit = 'character'
    • unit = 'word'
    Library of Congress