From: Jean-Claude Wippler <firstname.lastname@example.org> Subject: ANN: MetaKit for Tcl 1.0 - structured storage Date: Tue, 15 Sep 1998 13:53:03 +0200 MetaKit for Tcl Version 1.0 September 15, 1998 Copyright 1998 by Equi4 Software. MetaKit is a highly dynamic cross-platform database library providing robust storage for medium-sized database applications (a few dozen Mb). Nested data structures can de defined, accessed, and manipulated, using commit/rollback to maintain data integrity at all times. Datafiles are portable across all platforms (Unix, Windows, Mac, VMS, DOS, and more). MetaKit for Tcl (mk4tcl) is a self-contained extension for Tcl 8.x built with the MetaKit core engine, for use from the Tcl scripting language. ======================================================================== The on-line HTML documentation of MetaKit for Tcl is located at: http://www.equi4.com/metakit/info/README-Tcl.html The 1.0 release contains a self-installing demo (Linux, Windows, Mac): http://www.equi4.com/metakit/pub/mk4tcl-1.0.tar.gz That demo can also install platform builds from the website, try it: http://www.equi4.com/metakit/mk4tcl/demo.tcl ======================================================================== A DATABASE THAT FITS IN THE PALM OF YOUR HAND MetaKit offers features such as commit/rollback and high-performance memory-mapped file paging (on platforms which support this) that you would usually only expect in full-blown database packages and servers. Yet the core library, including data manipulation functions such as sorting, selection, join, group by, and set operations is around 90 Kb (on Win32 as DLL). The full-featured C++ API is based on a set of just 6 core classes and encapsulates all complexity to simplify its use. RUNTIME DATA STRUCTURES The most unusual feature is that existing datafiles can be restructured while open, yet with full commit/rollback. Due to an innovative design, restructuring is virtually instant and independent of database size. These versioning capabilities greatly simplify the task of extending applications which must maintain full backward datafile compatibility. Datafiles are self-describing and use an extremely compact format. All the usual datatypes are supported (ints, floats, variable strings and binary data). Adaptive integer sizing automatically uses 1..32 bits per value (based on magnitude), and all byte-order issues are taken care of. Each datafile can hold any number of independent tables ("views"), which can be structured and contain subviews to store hierarchically organized data (the hierarchy must be homogenous in structure). THE NATURAL STORAGE SOLUTION FOR TCL This release of MetaKit for Tcl demonstrates the flexibility of run-time data structures. It allows you to define new datafiles, alter their structure, and efficiently manage large amounts of variable data in Tcl. MetaKit for Tcl uses the Tcl 8.0 dual ported objects feature to achieve excellent performance. Note that Mk4tcl 1.0 does not yet interface to the most recent data manipulation features of MetaKit version 1.8. A FREE PACKAGE FOR A FREE ENVIRONMENT You are kindly invited to check out the flexibility and performance of this free download, but be warned that it may radically change the way you look at database- and persistence-libraries, maybe even at Tcl... http://www.equi4.com/metakit/info/README-Tcl.html The MetaKit library is freely available for personal and non-commercial use. Licenses for royalty-free commercial use are available for $165, this includes 1 year of updates and full MetaKit library source code. ________________________________________________________________________ Jean-Claude Wippler MetaKit home page - http://www.equi4.com/metakit/ Equi4 Software "Portable database software for a changing world"