Release 4
This page is part of the FHIR Specification (v4.0.1: R4 - Mixed Normative and STU ). This is the current published version in it's permanent home (it will always be available at this URL). For a full list of available versions, see the Directory of published versions HL7 v3 Code System CompressionAlgorithm

Vocabulary Work Group   Maturity Level : N/A External Use Context : Any

This code system ( is defined as part of HL7 v3.


Defining URL:
Version: 2018-08-12 2019-07-31
Name: v3.CompressionAlgorithm
Title: v3 Code System CompressionAlgorithm


OID: 2.16.840.1.113883.5.1009 (for OID based terminology systems)
Source Resource XML / JSON

This Code system is used in the following value sets:

Release Date: 2018-08-12 2019-07-31

Level Code Display Definition
1 BZ bzip bzip-2 compression format. See [] for more information.
1 DF deflate The deflate compressed data format as specified in RFC 1951 [].
1 GZ gzip A compressed data format that is compatible with the widely used GZIP utility as specified in RFC 1952 [] (uses the deflate algorithm).
1 Z compress Original UNIX compress algorithm and file format using the LZC algorithm (a variant of LZW). Patent encumbered and less efficient than deflate.
1 Z7 Z7 7z compression file format. See [] for more information.
1 ZL zlib A compressed data format that also uses the deflate algorithm. Specified as RFC 1950 []