Zoo filter format

File Format
Name	Zoo filter format
Ontology	Electronic File Formats Compression Zoo filter format
Released	1988

Zoo filter format is a compressed file format related to the Zoo archive format. It is a streamable format, intended to be used e.g. in Unix-style pipes.

Support for it was introduced in Zoo 2.00, as a compile-time option. It does not appear to be enabled in the DOS releases of Zoo.

The filter format is distinct from Zoo Z format.

Refer to the Zoo article for information related to the Zoo format and software.

Discussion

The format is a simple container format consisting of a two-byte signature, then the compressed data, then a CRC.

The compression method is either LZD or LZH. It is not recorded in the datastream. You must use the "h" option to compress or decompress LZH.

To compress, use "zoo fc" or "zoo fch". To decompress, use "zoo fu" or "zoo fuh".

Identification

Files start with bytes 32 5a.

Software

Refer to Zoo#Software.