This code system http://hl7.org/fhir/v3/CompressionAlgorithm defines the following codes:

CodeDisplayDefinition
BZbzipbzip-2 compression format. See [http://www.bzip.org/] for more information.
DFdeflateThe deflate compressed data format as specified in RFC 1951 [http://www.ietf.org/rfc/rfc1951.txt].
GZgzipA compressed data format that is compatible with the widely used GZIP utility as specified in RFC 1952 [http://www.ietf.org/rfc/rfc1952.txt] (uses the deflate algorithm).
ZcompressOriginal UNIX compress algorithm and file format using the LZC algorithm (a variant of LZW). Patent encumbered and less efficient than deflate.
Z7Z77z compression file format. See [http://www.7-zip.org/7z.html] for more information.
ZLzlibA compressed data format that also uses the deflate algorithm. Specified as RFC 1950 [http://www.ietf.org/rfc/rfc1952.txt]

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