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ARC is a lossless data compression and archival format by System Enhancement Associates (SEA). The file format and the program were both called ARC. The format is known as the subject of controversy in the 1980s, part of important debates over what would later be known as open formats.
Heritrix includes a command-line tool called arcreader which can be used to extract the contents of an Arc file. The following command lists all the URLs and metadata stored in the given Arc file (in CDX format): arcreader IA-2006062.arc The following command extracts hello.html from the above example assuming the record starts at offset 140:
The replacement for the .sit format that supports more compression methods, UNIX file permissions, long file names, very large files, more encryption options, data specific compressors (JPEG, Zip, PDF, 24-bit image, MP3). The free StuffIt Expander is available for Windows and OS X. .sqx SQX: Windows: Windows: Yes A royalty-free compressing format
Libarc allows users to open and scan contents of GZIP compressed ARC Files. It also allows users to get an iterator that walks over the contents of said ARC files, member by member. Users are able to specify the media type in order to limit the types seen.
The WARC format is a revision of the Internet Archive's ARC_IA File Format [4] that has traditionally been used to store "web crawls" as sequences of content blocks harvested from the World Wide Web. The WARC format generalizes the older format to better support the harvesting, access, and exchange needs of archiving organizations.
FreeArc uses LZMA, prediction by partial matching, TrueAudio, Tornado and GRzip [7] algorithms with automatic switching by file type. Additionally, it uses filters to further improve compression, including REP (finds repetitions at separations up to 1gb), DICT (dictionary replacements for text), DELTA (improves compression of tables in binary data), BCJ (executables preproccesor) and LZP ...
gzip is a file format and a software application used for file compression and decompression.The program was created by Jean-loup Gailly and Mark Adler as a free software replacement for the compress program used in early Unix systems, and intended for use by GNU (from which the "g" of gzip is derived).
ArcExplorer is a lightweight data viewer from ESRI for maps and GIS data in these formats: . ESRI Shapefile; ArcInfo coverages; ArcSDE layers; Images; ArcIMS Services (e.g., Geography Network sources)