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'Metakit' fills the gap between flat-file, relational, object-oriented, and tree-structured databases, supporting relational joins, serialization, nested structures, and instant schema evolution. There is a C++ API, a Python binding (Mk4py), and a Tcl binding (Mk4tcl). Data files are portable, use auto-sizing ints and strings, and can efficiently store binary data from single bits to multi-Mb objects. MetaKit works well for moderate-size (a few dozen Mb) datasets, and offers excellent performance well beyond that size when its column-wise data model is fully taken advantage of.


User tutorials available in HTML format from and


Download version (stable)
released on 26 January 2004

Paid support and consulting available from Equi4 Software at

VCS Checkout co metakit


Related Projects


LicenseVerified byVerified onNotes
X11Janet Casey18 March 2002

Leaders and contributors

Jean-Claude Wippler Maintainer

Resources and communication

Audience Resource type URI
Developer VCS Repository Webview
Help E-mail
Developer,Support E-mail
Bug Tracking Homepage

Software prerequisites

This entry (in part or in whole) was last reviewed on 2 December 2004.


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

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