2006-11-22: Updated OCamlMakefile. 2004-04-18: Minor speed improvement. 2004-03-24: Fixed a bug. New way of computing entropy in gain ratio for subvariables under redundant structures: takes into account probability estimates from multinomial estimation, which may differ from a pure frequency based approach. Made Ristad's "Natural Law of Succession" the current default for multinomial estimation instead of the frequency based approach. Experiments will still have to be performed to test its performance. 2004-03-22: Intermediate release to fix a bug. Changed computation of most frequent value again (dependent version). 2004-03-06: Fixed computation of most frequent value (dependent version). Should be both statistically and computationally optimal now. Updated copyright notice. Updated OCamlMakefile. 2003-11-26: Fixed a bug concerning type handling. Updated OCamlMakefile. 2003-10-08: Updated OCamlMakefile. 2003-04-04: Updated OCamlMakefile. 2003-03-18: Slightly improved performance reading in data. 2003-02-28: Fixed a bug in the computation of deep dependent entropy. Fixed a bug in the computation of independent shallow entropy. 2003-01-31: Fixed a problem concerning rounding-errors during calculation of gain ratios. 2003-01-16: Added flat representation of missing values. 2003-01-15: Improved efficiency of basic entropy calculation. Changed implementation of flag "-with-min-gr" with random models. The two options now work together without exhibiting degenerative behaviour. 2003-01-07: Updated OCamlMakefile. 2002-11-23: Fixed a bug: C4.5-data without input variables now treated correctly. 2002-11-21: Added time limit flag for generation of random models. 2002-10-17: Added include-path to contrib-directory so that the required libraries can be found during compilation. Fixed embarrassing misspelling of AFAID, eh, AIFAD in documentation. 2002-10-14: Initial release.