Version 21 of TclRAL

Updated 2008-01-17 16:35:13 by GAM

What: TclRAL

 Where: http://tclral.sourceforge.net/
 Description: Tcl Relational Algebra Library is a C based
        extension that introduces tuple and relation data types
        and a set of commands that operate on them.
        Currently at version 0.8.5 .
 Updated: 06/2007
 Contact: See web site

See also Transitive Closure.

See also Relations as Stacks.

See also Relations as Object Oriented Stacks.

See also crosstab a la Relations.

The Third Manifesto website [L1 ] lists TclRAL as:

an implementation of the relational algebra concepts in TTM as an extension of the Tcl language. It does not attempt to mimic the syntax of Tutorial D, but does implement a complete set of relational operations in a manner that is adapted to the Tcl programming environment.

Since many of the systems listed are described as not quite complete, TclRAL seems to do Very Good in an area of heavy duty computer science.

GAM 19 Nov 2007 In the spirit of full disclosure, I wrote the synopsis that is on the Third Manifesto web site. Mr. Darwen was kind enough to offer to put a link to the project on his web site after one of his associates brought it to his attention. He asked me to provide a synopsis which is what is found on the web site.

AM - 1 Oct 2006

I recently released Version 0.8 of TclRAL and thought that now was an appropriate time to make this page a bit more active for anyone that may be interested in the extension and wish to ask questions or post examples.

Version 0.8 is a complete rewrite of the extension to improve the code base and lay in a more maintainable structure. The major new feature of 0.8 is referential integrity checking. My current vision for the future is (roughly):

  • Additional code rework and testing.
  • Adding a few new features.
  • Honing the command interfaces leading up to a 0.9 release.
  • At Version 0.9, freezing the command interface for longer term backward compatibility support.
  • Leading to a Version 1.0 release.

I won't be so bold as to state a time frame for all of this, but as I use the extension myself I am as anxious to see it improve as anyone.

AM - 6 Feb 2007

Released Version 0.8.1. This version is script compatible with 0.8 and includes some new commands and command options. Most notable is the ability to trace relvars in much the same manner that one can trace ordinary Tcl variables.

GAM - 17 Jan 2008

Released Version 0.8.5. This is a small bug fix release to deal with a latent bug that was exposed by a small change in the semantics of Tcl 8.5. Small though the bug was, it did prevent serializing relvars when used with Tcl 8.5.

See Andrew Mangogna.

Relation Transitive Closure

Category Package Category Mathematics Category Data Structure