This code system http://terminology.hl7.org/CodeSystem/AS4 defines many codes, but they are not represented here

 <status value="active"/> <experimental value="false"/> <date value="2019-03-20T00:00:00-04:00"/> <publisher value="TBD - External Body"/> <contact> <name value="American Society for Testing & Materials"/> </contact> <description value="ASTM E1238/ E1467 Universal"/> <content value="not-present"/> </CodeSystem>