Project Documentation. File Formats and Supporting Software

Permanent URI for this collection

To aid long-term preservation of the data stored in DSpace, the formats of the data stored in the archive should be well-documtned. This collection aims to hold a comprehensive overview of the file formats stored in DSpace@Cambridge.

The collection also includes bundles of software (source code); this gives a reference implementation or serves as an illustration on the usage, en- and decoding of the archive contents.


Recent Submissions

Now showing 1 - 8 of 8
  • ItemOpen Access
    Digital compression and coding of continuous-tone still images
    (2009) Anon.
    This CCITT Recommendation | ISO/IEC International Standard was prepared by CCITT Study Group VIII and the Joint Photographic Experts Group (JPEG) of ISO/IEC JTC 1/SC 29/WG 10. This Experts Group was formed in 1986 to establish a standard for the sequential progressive encoding of continuous tone grayscale and colour images. Digital Compression and Coding of Continuous-tone Still images, is published in two parts: Requirements and guidelines; Compliance testing. This part, Part 1, sets out requirements and implementation guidelines for continuous-tone still image encoding and decoding processes, and for the coded representation of compressed image data for interchange between applications. These processes and representations are intended to be generic, that is, to be applicable to a broad range of applications for colour and grayscale still images within communications and computer systems. Part 2, sets out tests for determining whether implementations comply with the requirments for the various encoding and decoding processes specified in Part 1.
  • ItemOpen Access
    World Wide Web Molecular Matrix (WWWMM) supporting software
    (2005-08-22T16:19:24Z) Downing, Jim
    These scripts were used to correlate input from the World Wide Web Molecular Matrix, extract metadata from CML and to assemble the files into packages ready for import into DSpace 1.2
  • ItemOpen Access
    PostgreSQL open source relational database software source code
    Version 7.4.6 of the PostgreSQL relational database, in sourcecode format. This is part of the software running this archive (the database stores the metadata of DSpace items and provides some elements/logic to support the DSpace web front-end interface).
  • ItemOpen Access
    DSpace source code
    Version 1.2 of the DSpace Java sourcecode. This is part of the software running this archive.
  • ItemOpen Access
    tar (Tape ARchive) file format
    The tar program provides the ability to create tar archives, as well as various other kinds of manipulation. For example, you can use tar on previously created archives to extract files, to store additional files, or to update or list files which were already stored. Initially, tar archives were used to store files conveniently on magnetic tape. The name `tar' comes from this use; it stands for tape archiver. Despite the utility's name, tar can direct its output to available devices, files, or other programs (using pipes). tar may even access remote devices or files (as archives).
  • ItemOpen Access
    zlib compression library
    (2004-12-01T11:32:52Z) Gailly, Jean-loup; Adler, Mark
    zlib 1.2.1 is a general purpose data compression library written in the C programming language. All the code is thread safe. The data format used by the zlib library is described by RFCs (Request for Comments) 1950 to 1952 in the files (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format). These documents are also available in the DSpace@Cambridge "DSpace" community, in the "RFCs" collection. All functions of the compression library are documented in the file zlib.h (volunteer to write man pages welcome, contact A usage example of the library is given in the file example.c which also tests that the library is working correctly. Another example is given in the file minigzip.c. The compression library itself is composed of all source files except example.c and minigzip.c.
  • ItemOpen Access
    The Independent JPEG Group's JPEG software
    (2004-03-30T15:01:55Z) Independent JPEG Group
    This distribution contains the sixth public release of the Independent JPEG Group's free JPEG software. You are welcome to redistribute this software and to use it for any purpose, subject to the onditions identified in the README inside this tarfile.
  • ItemOpen Access
    JPEG File Interchange Format
    (2004-03-30) Hamilton, Eric
    Standards document describing the JPEG File Interchange Format.
Most of the contents of this collection is in the public domain, under a GNU free license or in the Creative Commons. However, it is recommended that users of this information try and find the original source of the standards documents before disseminating them. We give no warranties as to the usefulness of this information, nor do we imply that this information is free to be reused.