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	AUTOCLASS C VERSION 3.3.4 NOTES 
====================================================================== 
======================================================================

Documentation:
------------------------------

  1. autoclass-c/sample files were regenerated because of the
     SAFE_LOG change (item 6. below).  Only very minor changes
     occurred.


Programming:
------------------------------						

  1. autoclass-c/prog/globals.c -
        Update "G_ac_version" to 3.3.4.

  2. autoclass-c/prog/predictions.c -
     In autoclass_predict, allocate separate storage for
     test_clsf->reports->class_wt_ordering to prevent 
     segmentation violation on Linux platforms when running
     in predict mode.

  3. autoclass-c/prog/autoclass.h, minmax.h -
     Macros min() and max() have been moved to a new file:
     minmax.h.
 
     Added `#include "minmax.h"' to the following files:
     intf-reports.c io-read-data.c matrix-utilities.c
     model-multi-normal-cn.c model-single-normal-cm.c
     model-single-normal-cn.c model-update.c
     search-basic.c search-control-2.c search-control.c
     statistics.c struct-data.c utils.c

     Removed the prototypes for build_sn_cm_priors() and
     build_sn_cn_priors().  These functions are used only 
     in the .c files that contain them, so are now static 
     functions.

     Changed the prototype for log_gamma(), for reasons 
     explained below.

  4. autoclass-c/prog/getparams.c -
     Corrected argument to sizeof() on line 142.

  5. autoclass-c/prog/struct-clsf.c -
     Zero global pointer and counter variables after deleting the 
     structures to which they refer.

  6. autoclass-c/prog/utils-math.c -
     Before, the function safe_log() returned 0.0 when its 
     argument was less than or equal to LEAST_POSITIVE_SINGLE_FLOAT.
     This is clearly wrong.  Log(x) approaches -infinity (not 0) 
     as x approaches 0.  The fix is to have safe_log() return 
     LEAST_POSITIVE_SINGLE_LOG for x near 0.

  7. autoclass-c/prog/search-control-2.c -
     In variance, check for lists of length less than 2,
     and return 0.


  Items 3 - 7 were submitted by Jack Wathey <wathey@salk.edu>.


  8. autoclass-c/prog/intf-reports.c -
     Correct FORMAT_DISCRETE_ATTRIBUTE to prevent string overrun and
     segmentation violations when single multinomial values exceed
     20 characters, while running in report mode.

  9. autoclass-c/prog/io-results.c -
     Correct READ_ATT_DS to prevent string overrun and
     segmentation violations when single multinomial values exceed
     40 characters, while running in report mode.







	AUTOCLASS C VERSION 3.3.3 NOTES 
====================================================================== 
======================================================================

Documentation:
------------------------------

  1. autoclass-c/doc/reports-c.text - document that report log messages
        will go into a ".rlog" file, rather than the ".log" which is
        used during search runs.  Also minor typos corrected.



Programming:
------------------------------						

  1. autoclass-c/prog/globals.c -
        Update "G_ac_version" to 3.3.3.

  2. autoclass-c/prog/init.c, intf-reports.c, intf-sigma-contours.c -
        Sun Solaris CC compiler breaks when #ifdef, etc preprocessor
     directives do not start in column 1.  All preprocessor 
     directives now start in column 1.  

  3. autoclass-c/prog/autoclass.make.alpha.cc,
     autoclass-c/load-ac -
        A Makefile for the Dec Alpha (OSF1 v4.0) has been added.

  4. autoclass-c/prog/prints.c -
        Modified PRINT_VECTOR_F to eliminate compiler warning.

  5. autoclass-c/prog/search-control.c -
        Conditionalize two warning tests to fail in batch mode
     (.s-params parameter interactive_p = false), rather than
     attempt to ask the user whether to proceed.

  6. autoclass-c/prog/autoclass.h, autoclass.c, io-results.c -
        To make it convenient to generate reports while the search
     is still running, so you can decide whether or not to stop the
     search, but not have the search log file be overwritten with the
     report log file, the report log file will now be written to a
     file with the extension ".rlog".  The search output will continue
     to be directed to a file with the extension ".log".

  7. autoclass-c/prog/getparams.c, init.c, io-read-model.c, struct-class.c -
        Change sizeof(int) to sizeof(void *), so that 64-bit architectures
     will be handled properly.  This corrects the core dump which occurs
     on Dec Alpha platforms at the end of each search or reports run, when
     AutoClass C attempts to free allocated storage.










	AUTOCLASS C VERSION 3.3.2 NOTES 
====================================================================== 
======================================================================

Documentation:
------------------------------

  1. autoclass-c/doc/search-c.text -
        Add a paragraph to section 8.0 SEARCH VARIATIONS discussing
     how running AutoClass in prediction mode can indicate whether
     you currently have a well converged classification.

        Add a paragraph to section 11.0 JUST HOW SLOW IS IT? discussing
     how to deal with very large data sets.

  2. autoclass-c/doc/preparation-c.text -
        Add section 1.3.1.1 HANDLING MISSING VALUES, which discusses
     AutoClass C's approach to dealing with missing values in the
     input data set.



Programming:
------------------------------						

  1. autoclass-c/prog/globals.c -

        Update "G_ac_version" to 3.3.2.

  2. autoclass-c/prog/autoclass.h, intf-reports.c -
        In AUTOCLASS_REPORTS, write the default and overridden parameters
     from the .r-params file to the log file.  Add error checking for
     report_type.

     In CASE_CLASS_DATA_SHARING, correct problem where "-predict" mode
     ignores report_type options of "xref_case" and "xref_class". 

  3. autoclass-c/prog/autoclass.c -
        In MAIN, initialize log file for "-predict" mode.  Prior to this
     change, there were no log entries for "-predict" mode runs.

  4. autoclass-c/prog/io-read-data.c -
        In CHECK_ERRORS_AND_WARNINGS, write warnings and errors to log file.
     In the situations of restarting a classification search, running a
     classification report, or running a classification prediction,
     warning and error messages which have until now gone only to the
     screen, will now go into the log file.

  5.  autoclass-c/prog/intf-reports.c, predictions.c -
        In AUTOCLASS_REPORTS, pass log file arguments to AUTOCLASS_PREDICT,
     so that errors and warnings generated in processing the test
     classification will be written to the log file.

  6. autoclass-c/prog/model-transforms.c -
        In LOG_TRANSFORM, add "Suggest decreasing attribute's rel_error." to
     error message: "log transform of attribute# 5 using mn -120.398972 
     rather than 0.000000 for zero_point."


======================================================================



	AUTOCLASS C VERSION 3.3.1 NOTES 
====================================================================== 
======================================================================

Documentation:
------------------------------

  1. 


Programming:
------------------------------						

  1. autoclass-c/prog/globals.c -

        Update "G_ac_version" to 3.3.1.

  2. autoclass-c/prog/io-results.c, io-results-bin.c -
        In READ_CLSF_SEQ and LOAD_CLSF_SEQ, check for win/unx suffix
    in ac_version before stripping it off.  This corrects an
    incompatibility with .results[-bin] files written by AutoClass C
    versions prior to version 3.3.  The error, for .results-bin files,
    looks like this: ERROR: expecting "ac_version n.n", found "ac_version ";
    Abort.



======================================================================



	AUTOCLASS C VERSION 3.3 NOTES 
====================================================================== 
======================================================================

NOTE: This version is an integrated source port of version 3.2.2 to
      Windows NT/95.  There are no new capabilities or bug fixes over
      and above version 3.2.2.

Windows Compatibility Changes:
-----------------------------------
  Thanks to Autumn <autumn@netron.com>, we now have an integrated
  source release of AutoClass C for Unix platforms and Windows
  platforms (requires Microsoft Visual C++ 5.0).  Due to the Unix
  "line feed" and the Windows "carriage return/line feed" incompatibility,
  there are two distributions, one for Unix-based platforms, and one
  for Windows platforms.

  Summary of source changes:
     autoclass-c/prog/*.c -
        Using _MSC_VER in preprocessor forms, remove the include of
        Unix-specific headers, and add the Win32 equivalent.
     autoclass-c/prog/autoclass.h -
        Use rand in place of lrand48, therefore change srand48 to srand.
     autoclass-c/prog/getparams.c, getparams.h, intf-reports.c, search-control.c
        Prefixed enum members with T so they would not clash with predefined types.
     autoclass-c/prog/init.c
        getcwd is called _getcwd in MSVC.
     autoclass-c/prog/model-expander-3.c, params.h, struct-class.c -
        Prefixed enum member IGNORE with T so it would not clash with
        predefined type.
     autoclass-c/prog/search-control.c -
        Made two queries conditional on interactive_p; moved init of stream
        with stdout -- MSVC doesn't think it's a constant.
     autoclass-c/prog/utils.c -
        Created an lrand48 for win32; created a char_input_test() that works
        with win32.
     autoclass-c/prog/fcntlcom-ac.h -
        Adapt for MSVC.


Documentation:
------------------------------

  1. Update sample AutoClass C run files contained in autoclass-c/sample.


Programming:
------------------------------						

  1. autoclass-c/prog/globals.c -

     Update "G_ac_version" to 3.3unx or 3.3win, depending on which
     platform AutoClass C is compiled.

  2. autoclass-c/prog/globals.c, globals.h, intf-extensions.c, intf-reports.c,
       search-control-2.c, search-control.c, io-results-bin.c,
       io-results.c, io-read-model.c, & io-read-data.c -

     Add G_slash, which is "/" for Unix, and "\" for Windows.
     Change all occurrences of local variable "slash" to "G_slash".
     This will allow AutoClass C to handle both Unix and Windows
     relative and absolute pathnames properly.

  3. autoclass-c/prog/init.c -

     In INIT, append either "/" or "\" to G_absolute_pathname.

  4. autoclass-c/prog/intf-sigma-contours.c -

     In GENERATE_SIGMA_CONTOURS use %+13e for Windows instead of
     %13e in order to maintain column alignment for positive and
     negative values.

  5. autoclass-c/prog/intf-reports.c -

     For Windows, use %+9.2e rather than %9.2 in FORMAT_REAL_ATTRIBUTE
     and FORMAT_DISCRETE_ATTRIBUTE, in order to maintain column alignment
     for positive and negative values.

     Call FILTER_E_FORMAT_EXPONENTS to filter Windows peculiar %e format
     output of e+000 => e+00, and e-000 => e-00.

  6. autoclass-c/prog/intf-sigma-contours.c -

     For Windows, use %+13e rather than %13 in GENERATE_SIGMA_CONTOURS,
     in order to maintain column alignment for positive and negative values.

     Call FILTER_E_FORMAT_EXPONENTS to filter Windows peculiar %e format
     output of e+000 => e+00, etc, and e-000 => e-00.
     

  7. autoclass-c/prog/io-results.c, io-results-bin.c -

     In READ_CLSF_SEQ and LOAD_CLSF_SEQ, truncate unx/win from the version
     prior to checking for numeric content.

  8. autoclass-c/prog/autoclass.c -
     In AUTOCLASS_ARGS, display "autoclass" or "Autoclass.exe" depending
     on platform.

======================================================================



	AUTOCLASS C VERSION 3.2.2 NOTES 
====================================================================== 
======================================================================

Documentation:
------------------------------

  1. autoclass-c/doc/search-c.text - clarify the usage of the
        RECONVERGE_TYPE parameter.


Programming:
------------------------------						

  1. autoclass-c/prog/globals.c -

        Update "G_ac_version" to 3.2.2.

  2. autoclass-c/data/uci-dbs-readme.text -
        Replaced out-of-data information with current Web pointer.

  3. autoclass-c/data/tests.c &
     autoclass-c/data/glass/ report files
        Version 3.2 contained changes to the multi-normal-cn model
     which changed slightly the results of the non-random test
     cases.  They have been updated.


======================================================================



	AUTOCLASS C VERSION 3.2.1 NOTES 
====================================================================== 
======================================================================

Documentation:
------------------------------

  1. autoclass-c/doc/checkpoint-c.text - bring up to date the usage of 
        force_new_search_p in the examples.


Programming:
------------------------------						

  1. autoclass-c/prog/globals.c, globals.h, search-control.c, intf-reports.c,
        autoclass.c, io-results.c, io-results-bin.c -

        Update "G_ac_version" to 3.2.1, and change type from float to
        string.

  2. autoclass-c/prog/autoclass.h, io-read-data.c -
        Comment out unused functions: DEFINE_DISCRETE_TRANSLATIONS, and
     PROCESS_DISCRETE_TRANSLATIONS.

        Unused #defines  MAXINT and DBG_LL commented out.


======================================================================



	AUTOCLASS C VERSION 3.2 NOTES 
====================================================================== 
======================================================================

Documentation:
------------------------------

  1. autoclass-c/doc/search-c.text -
        Added a new section: 14.0 How to get AutoClass C to Produce 
     Repeatable Results.

     Added information about running AutoClass C with more than 1000
     attributes in sections: 10.0 Do I Have Enough Memory and Disk Space?

     Changed the behavior of search parameter force_new_search_p in 
     order to prevent search trials from being inadvertently lost:
     if TRUE, will ignore any previous search results, discarding the 
     existing .search & .results[-bin] files after confirmation by the 
     user; if FALSE, will continue the search using the existing 
     .search & .results[-bin] files.  The default value of
     force_new_search_p is now true.

  2. autoclass-c/doc/interpretation-c.text -
        Added section headings and a new section entitled: Comparing 
     Influence Report Class Weights And Class/Case Report Assignments

  3. autoclass-c/doc/preparation-c.text -
        Added more to section: 1.2.1  SINGLE_NORMAL_CN/CM and 
     MULTI_NORMAL_CN Models

  4. autoclass-c/doc/reports-c.text -
        Improved the last pargraph of Generating Sigma Contour Values. 

        Replace parameters start_sigma_contours_att and 
     stop_sigma_contours_att with sigma_contours_att_list, to allow 
     non-contiguous groups of attributes to be specified.


Programming:
------------------------------						

  1. autoclass-c/prog/globals.c -
        Update "G_ac_version" to 3.2.

  2. autoclass-c/prog/intf-reports.c -
        In INFLUENCE_VALUES_HEADER, change
     `fprintf( influence_report_fp, header);' to
     `fprintf( influence_report_fp, header, "");', and in
     CLASS_WEIGHTS_AND_STRENGTHS and CLASS_DIVERGENCES add args to 
     output_title fprintf for new page -- this prevents 
     segmentation faults, when the number of attributes exceeds one
     page, while in report_mode = "text".

  3. autoclass-c/prog/intf-sigma-contours.c -
        In COMPUTE_SIGMA_CONTOUR_FOR_2_ATTS, corrected initialization 
     of *rotation. This corrects erroneous values of the contour's
     rotation.

  4. autoclass-c/prog/struct-class.c -
        Correct compiler warning "struct-class.c:239: warning: 
     unused variable `database'".
  
  5. autoclass-c/prog/struct-data.c, globals.h, globals.c, search-control.c -
        In EXPAND_DATABASE, use comp_database->n_data rather than 
     G_s_params_n_data, since G_s_params_n_data does not do the right thing
     when expand_database is called during report generation (it reads
     the whole file, not just n_data cases).  Remove references to
     G_s_params_n_data from the 2nd to 4th files.

  6. autoclass-c/prog/intf-reports.c -
        In XREF_GET_DATA, allocate more storage for instance class 
     probabilities if there are more than MAX_NUM_XREF_CLASS_PROBS, and 
     only save for printing a maximum of MAX_NUM_XREF_CLASS_PROBS classes.

     IMPORTANT NOTE: This bug fix means that for any previous reports
                     generated by AutoClass C, any data base instance
     which has five class probability entries in the class cross-reference 
     report, and 1.0 minus the sum of the five probabilities is greater 
     than the largest of them, is in the WRONG CLASS!  Re-run the reports
     with this version!

  7. autoclass-c/prog/autoclass.c -
        Print the AutoClass C version when the user invokes AutoClass
     with no arguments: % autoclass

  8. autoclass-c/load-ac -
        Specified define flags for SunOS gcc and Solaris gcc compilations
     to prevent compiler warnings. Added IRIX 6.4 compatibility.

  9.  autoclass-c/prog/autoclass.h -
        For gcc under SunOS, include function prototypes for *rand48 functions,
      to prevent compiler warnings.

 10. autoclass-c/prog/intf-reports.c -
        Add descriptive text for each influence value class parameter for
     reports with parameter report_mode = "text".

 11. autoclass-c/prog/autoclass.make.solaris.cc -
        Corrected optimization flag.

 12. autoclass-c/prog/intf-reports.c -
        In FORMAT_REAL_ATTRIBUTE, correct correlation matrices print-out 
     for non-contiguous model term attributes, and print matrices only once,
     after all class attributes are listed.

 13. autoclass-c/prog/search-control.c -
        In AUTOCLASS_SEARCH, if force_new_search_p is false, exit if there 
     is no <...>.results[-bin] file.  Make TRUE the default for 
     force_new_search_p.

 14. autoclass-c/prog/intf-reports.c -
        In PRINT_ATTRIBUTE_HEADER, remove references to INTEGER attribute type.

 15. autoclass-c/prog/getparams.c -
        In GETPARAMS, correct logic so that missing "line feed" on last line
     of the file will be read properly, rather than getting:
     ERROR: line read exceeds 100 characters: <.....>.
        In GETPARAMS, correct logic so that an empty integer list (e.g. 
     start_j_list =) may be entered in the .s-params file.  This is needed
     for a restart search situation when it is necessay to peel off as many 
     classes from the start_j_list as were already done by the previous run.
     If all of the start_j_list was done already, then an empty list is
     required.

 16. autoclass-c/prog/io-read-data.c, io-results.c, io-results-bin.c -
        In READ_DATA, EXPAND_CLSF_WTS, and LOAD_CLASS_DS_S  add checks for 
     "out of memory" returns from malloc and realloc.

 17. autoclass-c/prog/io-results.c -
        In MAKE_AND_VALIDATE_PATHNAME, VALIDATE_RESULTS_PATHNAME,
     VALIDATE_DATA_PATHNAME, and GET_CLSF_SEQ change strchr to strrchr 
     to handle `../filename.extension'

 18. autoclass-c/prog/autoclass.h, predictions.c, search-basic.c, &
     search-control.c -
        Notify the user with a warning messasge and an option to exit from
     an initial classification run, if the data set size is greater than
     1000.  The messasge is "WARNING: the default start_j_list may not 
     find the correct number of classes in your data set!".

 19. autoclass-c/prog/autoclass.h, autoclass.c, & intf-reports.c -
        Write -reports option screen output to log file.

 20. autoclass-c/prog/io-read-data.c -
        In FIND_DISCRETE_STATS, when the number of discrete value 
     translators is less than attribute definition range, reduce the
     range and output an advisory, rather than outputting warning
     message and asking the user whether to proceed or not.

     The above change was REMOVED, since it caused an incompatablility with 
     previous results files: "ERROR: expand_database found unmatched common 
     attributes defs in <.results[-bin] file> and ........

 21. autoclass-c/prog/global.h, global.c, search-control-2.c, & search-control.c -
        Warn user of search trials which do not converge, which means that
     their number of try cycles reached the value of the "max_cycles" search 
     parameter.  Do this by printing a warning message after the trial completes.
     Also after the "SUMMARY OF n BEST RESULTS" at the conclusion of each
     run, print "SUMMARY OF TRY CONVERGENCE" for the n best results.

 22. autoclass-c/prog/model-multi-normal-cn.c -
        It was recently brought to our attention that the multi-normal
     model, with more than about 10 attributes and several thousand
     instances, would consistently run to the the max_duration or
     max_n_tries limit, regardless of how large those limits were.
     Suitably instrumented experiments showed that EM (expectation
     maximization) was actually oscillating.  The problem was traced 
     to a conceptual error in the underflow limiting code that 
     constrains the estimation of empirical standard deviations.  
     This has been corrected.  However users should be alert for, 
     and report, any further problems of this nature.
 
 23. autoclass-c/prog/autoclass.h, intf-reports.c -
        For MNcn attributes, do not sort them within their model term
     when order_attributes_by_influence_p = false.  The outputing of
     MNcn correlation matrices after last class attribute, instead of 
     after each term, is now done by a call to
     GENERATE_MNCN_CORRELATION_MATRICES from
     AUTOCLASS_CLASS_INFLUENCE_VALUES_REPORT.

 24. autoclass-c/prog/intf-reports.c, intf-sigma-contours.c -
        Replace report parameters start_sigma_contours_att and 
     stop_sigma_contours_att with sigma_contours_att_list, to allow 
     non-contiguous groups of attributes to be specified.

        Check for attribute indices of reports parameter
     sigma_contours_att_list which are declared "ignore" by the .model file.
     Prevents segmentation fault.

        Correct erroneous rotations for non-covariant pairs of attributes
     modeled in two different covariant normal terms (the rotations in these
     cases should be 0.0).

 25. autoclass-c/prog/intf-reports.c -
        Previously when specifying report_type = "xref_case" or
     report_type = "xref_class" along with n_clsfs > 1 or  clsf_n_list with 
     more than 1 list element, the .case-text-n or .class-text-n data would 
     be identical.  Sometimes segmentation faults would occur.  This has
     been corrected.  This was not a problem for report_type = "all" 
     (the default).  Also when using the default for report_type ("all"),
     previously the memory allocated for each classification's cross
     reference was not deallocated after each classification was processed.
     It is now properly deallocated.



======================================================================














	AUTOCLASS C VERSION 3.1 NOTES 
====================================================================== 
======================================================================

Documentation:
------------------------------

  1. autoclass-c/data/tests.c -
        Reconfigure parameter values for the checkpointing test case.

  2. autoclass-c/data/glass/glassc-chkpt.s-params -
        Include checkpoint test param settings from tests.c

  3. autoclass-c/data/autos/* -
        Add input data files for last **non**-random trial test of
     autoclass-c/data/tests.c

  4. autoclass-c/doc/prediction-c.text -
        Add text concerning handling of "test" cases which are not
     predicted to be in any of the "training" classes.

  5. autoclass-c/doc/reports-c.text -
        Add new reports param: comment_data_headers_p, which prefixes
     the "#" comment character to all lines except the minimum for 
     selective parsing.

        Add new reports param: max_num_xref_class_probs, which determines
     how many lessor class probabilities will be printed for the case
     and class cross-reference reports.  The default value is 5.

        Add new report params: start_sigma_contours_att &
     stop_sigma_contours_att.  This adds the capability to compute sigma 
     class contour values for specified pairs of real valued attributes,
     when generating the influence values report with the data option
     (report_mode = "data"). See section "Generating Sigma Contour Values".



Programming:
------------------------------						

  1. autoclass-c/prog/globals.c -
        Update "G_ac_version" to 3.1.

  2. autoclass-c/prog/io-results.c -
        In VALIDATE_RESULTS_PATHNAME, handle checkpoint files similarly
    to results files: determine if they are ascii or binary, rather than 
    assuming they are binary.  This was only a problem when .s-params
    parameters save_compact_p = false, and read_compact_p = false.

    In GET_CLSF_SEQ, handle checkpoint files similarly to results files.
    This fix now allows checkpoint files to be loaded for reconvergence.

  3. autoclass-c/prog/intf-reports.c, autoclass.h -
        In XREF_GET_DATA, allocate memory for collector once for each case, 
     rather than n_classes times. This fix now permits reports to be 
     generated for data sets of 100,000 cases and more, without causing
     a segmentation fault.  Eliminate ATTR_ALLOC_INCREMENT, and allocate 
     once for all discrete, and once for all real report attributes, if 
     needed, rather than invoking malloc/realloc for each report attribute.

  4. autoclass-c/prog/intf-reports.c, autoclass.h -
        In AUTOCLASS_REPORTS, pass prediction_p to CASE_CLASS_DATA_SHARING,
     so that XREF_GET_DATA can flag "test" cases which are not predicted
     in be in any of the "training" classes.  Put them in class -1.
     This is only functional for "autoclass -predict ..." runs.  The 
     following message will appear in the screen output for each case that
     is not a member of any of the "training" classes:
        xref_get_data: case_num xxx => class 9999
     Class 9999 members will appear in the "case" and "class" cross-
     reference reports.

  5. autoclass-c/prog/intf-influence-values.c -
        In INFLUENCE_VALUE, do not process attribute values which have 
     null translations.  This occurs when the user supplies an excessive range
     value in .hd2, and ignores the warning to correct it.  This prevents
     a segmentation fault.

  6. autoclass-c/prog/struct-data.c -
        In EXPAND_DATABASE, make error msg more informative.

  7. autoclass-c/prog/autoclass.h, intf-reports.c, intf-extenstions.c,
     search-control-2.c -
        Implement new reports param "comment_data_headers_p", which prefixes
     the "#" comment character to all lines except the minimum for selective
     parsing.

  8. autoclass-c/prog/io-read-data.c -
        In OUTPUT_REAL_ATT_STATISTICS, add error check for attribute variance
     exceeding infinity.  This situation is caused by "out-liers" with very large
     deviations from the other attribute values, and usually means that these
     attribute values are erroneous.  AutoClass C can not proceed in this
     situation.

  9. autoclass-c/prog/intf-reports.c -
        In the influence values report for multi_normal_cn models, when there 
     are more than one covariant normal correlation matrix, print all of them 
     for each class, not just the one for the least significant attribute of 
     the current class.  Changes to FORMAT_ATTRIBUTE & FORMAT_REAL_ATTRIBUTE.

 10.  autoclass-c/prog/intf-reports.c -
        In the case cross-reference report (report_type = "xref_case")
     generated with the data option (report_mode = "data"), other class
     probabilities are now printed, if their values are greater than or
     equal to 0.001, and there are not more than (MAX_NUM_XREF_CLASS_PROBS - 1)
     of them.  Changes to XREF_PAGINATE_BY_CASE, & XREF_OUTPUT_PAGE_HEADERS.

 11. autoclass-c/prog/intf-reports.c -
        In the case and class cross-reference reports, the print out of
     probabilities has increased by one significant digit (0.04 => 0.041);
     and the minimum value printed is now 0.001, rather than 0.01.
     The maximum number of lessor probabilities printed out is
     (MAX_NUM_XREF_CLASS_PROBS - 1).  Changes to XREF_PAGINATE_BY_CASE, &
     XREF_OUTPUT_LINE_BY_CLASS.

 12. autoclass-c/prog/intf-reports.c -
        Add new report parameter MAX_NUM_XREF_CLASS_PROBS, which determines
     how many lessor class probability values will be printed in the
     case and class cross-reference reports.

 13. autoclass-c/load-ac, autoclass-c/prog/autoclass.make.*,
     autoclass-c/prog/autoclass.h, intf-sigma-contours.c, intf-reports.c -
        Add capability to compute sigma class contour values for
     specified pairs of real valued attributes, when generating the
     influence values report with the data option (report_mode = "data").  
     Add new report params start_sigma_contours_att & stop_sigma_contours_att.



======================================================================










	AUTOCLASS C VERSION 3.0 NOTES 
====================================================================== 
======================================================================

Documentation:
------------------------------

  1. autoclass-c/doc/search-c.text, reports-c.text --
        New parameter for .s-params & .r-params files: free_storage_p.
     The default value tells AutoClass to free the majority of its 
     allocated storage.  If specified as false, AutoClass will not
     attempt to free storage.

  2. autoclass-c/doc/preparation-c.text -
        Correct typos "looses" and "scaler".

  3. autoclass-c/doc/reports-c.text --
        New parameter for .r-params files: report_mode.  It specifies
     the mode of the reports to generate.  The default, "text", is 
     the current formatted text layout.  The new "data" option has a
     parsable numerical layout -- suitable for further processing.

  4. autoclass-c/sample/read.me.c, scriptc.text, imports-85c.influ-o-data-1,
        imports-85c.case-data-1, imports-85c.class-data-1
     Updated the sample classification for report_mode = "data"
     reports.


Programming:
------------------------------						

  1. autoclass-c/prog/globals.c -
        Update "G_ac_version" to 3.0.

  2. autoclass-c/prog/autoclass.h, io-results.c, io-results-bin.c, struct-class.c,
                struct-clsf.c, struct-model.c
        Correct improper pointer casting:
    fprintf(stdout, "free_model(%d): %d\n", i_model, (int) model);
    to
    fprintf(stdout, "free_model(%d): %p\n", i_model, (void *) model);
    which generates compiler warnings on 64-bit architectures.

    Change prototype for list_class_storage & list_clsf_storage from 
    int * to void **.

  3. autoclass-c/prog/search-control.c, intf-reports.c -
        Process new params option: free_storage_p.

  4. autoclass-c/prog/search-control-2.c -
        Correct formatted message typos "print print" and "estiamte" in 
     PRINT_INITIAL_REPORT.

  5. autoclass-c/prog/intf-reports.c -
        In PRE_FORMAT_ATTRIBUTES, check for num_terms > 0 prior to calling
     SORT_MNCN_ATTRIBUTES.

  6. autoclass-c/prog/io-read-data.c -
        In READ_LINE, only return FALSE if no chars have been read -- allows
     last line with no new-line to be read correctly.

  7. autoclass-c/prog/getparams.c -
        Correct GETPARAMS for INT_LIST: to allow "= 84, 92 " to be read
     as 84 & 92, rather than 84 & 84. Also allows "n_clsfs = 2 " to be
     read properly.

  8. autoclass-c/prog/autoclass.h, intf-reports.c -
        Implement "report_mode" parameter.

  9. autoclass-c/prog/io-read-data.c -
        In PROCESS_ATTRIBUTE_DEF, check for incomplete discrete and
     real attribute definitions.

 10. autoclass-c/load-ac -
        Use "/bin/uname -s" to determine if host is running IRIX (SGI).

 11. autoclass-c/prog/struct-class.c -
        In FREE_TPARM_DS, allow tparm->tppt to be UNKNOWN or IGNORE.
     If not matched, print advisory msg, not error msg.  Do not abort.

 12. autoclass-c/prog/autoclass.h, search-basic.c, model-expander-3.c,
        struct-class.c, struct-clsf.c, predictions.c, & search-control-2.c
     When creating the weights for a new class, use database->n_data
     for the appropriate data base, rather than model->database->n_data.
     In the "prediction" mode, this correctly builds the test database
     class weights using the size of the test database, rather than
     that of the training database -- which is pointed to by the model.
     Functions modified: SET_UP_CLSF, GET_CLASS, CLASS_MERGED_MARGINAL_FN,
     COPY_CLASS_DS, ADJUST_CLSF_DS_CLASSES, COPY_CLSF_DS, POP_CLASS_DS,
     BUILD_CLASS_DS, COPY_TO_CLASS_DS, AUTOCLASS_PREDICT, &
     PRINT_SEARCH_TRY.  This corrects a segmentation fault which occured
     during storage deallocation of prediction runs.

======================================================================





	AUTOCLASS C VERSION 2.9 NOTES 
====================================================================== 
======================================================================

Documentation:
------------------------------

  1. autoclass-c/doc/search-c.text, reports-c.text -
        Added new parameter for both ".s-params" & ".r-params"
     files: break_on_warnings_p.  The default value asks the user 
     whether to continue or not when data definition warnings are found.
     If specified as false, then AutoClass will continue, despite 
     warnings -- the warning will continue to be output to the terminal
     and, in the case of the "-search" option, to the log file.



Programming:
------------------------------						

  1. autoclass-c/prog/globals.c -
        Update "G_ac_version" to 2.9.

  2. autoclass-c/prog/autoclass.make.solaris.cc -
         Correct compiler options for SC4.1 cc compiler

  3. autoclass-c/prog/intf-reports.c -
        In FORMAT_DISCRETE_ATTRIBUTE, correct bad test for 
     warn_errs->single_valued_warning.  This prevented "discrete"
     type attributes from being displayed in the influence values
     report, because a segmentation fault occurred.   This 
     problem was introduced in version 2.8.

  4. autoclass-c/prog/autoclass.h -
        In STRUCT I_REAL, type "last_sorted_term_n_att" as int,
     not float.

  5. autoclass-c/prog/intf-reports.c -
        In SORT_MNCN_ATTRIBUTES, type "last_sorted_term_n_att"
     as int, not float.  In PRE_FORMAT_ATTRIBUTES, revise logic for
     computing/printing the correlation matrix.  Items 4. & 5 
     correct the problem of the correlation matrix for attribute 
     type multi_multinomial_cn is only printed if it is last in
     the sorted list of attributes.

  6. autoclass-c/prog/struct-data.c -
        In EXPAND_DATABASE, make cosmetic change to an error message.

  7. autoclass-c/prog/intf-reports.c -
        In XREF_GET_DATA, validity check that .r-params file values
     of xref_class_report_att_list are in the range 0 - (number of 
     attributes - 1).  Prevents segmentation fault.
        Also in XREF_GET_DATA, correct syntax and location of
     memory free command.  Prevents segmentation fault when processing
     discrete type data.  This problem was introduced in version 2.8.

  8. autoclass-c/prog/getparams.h -
        Increased MAXPARAMS to 40.

  9. autoclass-c/prog/search-control.c, intf-reports.c -
        Added code to parse the new parameter: break_on_warnings_p.

 10. autoclass-c/prog/autoclass.h, intf-reports.c -
        Compute last_clsf_p and pass to XREF_GET_DATA, so that freeing
     of data will not be done until all clsfs have been processed.
     To take advantage of the memory reduction, only process one clsf
     and a time -- this applies only to very large data sets.



======================================================================





	AUTOCLASS C VERSION 2.8 NOTES 
====================================================================== 
======================================================================

Documentation:
------------------------------

  1. autoclass-c/doc/search-c.text -
        Add new search parameter "read_compact_p", which directs
        AutoClass to read the "results" and "checkpoint" files in
        either binary format -- ".results-bin"/".chkpt-bin"
        (read_compact_p = true); or ascii format -- ".results"/".chkpt"
        (read_compact_p = false).  The default is read_compact_p = true.



Programming:
------------------------------						

  1. autoclass-c/prog/globals.c -
        Update "G_ac_version" to 2.8.

  2. autoclass-c/prog/io-results.c -
        In "validate_data_pathname", prefer the user supplied file
        extension, and only attempt to open ".db2", and then
        ".db2-bin", if no extension (/name.) or an invalid extension
        is supplied.  Check for presence of '.' in pathname.

        In "validate_results_pathname" prefer the user supplied file
        extension, and only attempt to open ".result-bin", and then
        ".results", if no extension (/name.) or an invalid extension
        is supplied.  Check for presence of '.' in pathname.

        In "make_and_validate_pathname" check for presence of '.' in
        pathname.

        In "get_clsf_seq" simplify the test for "ascii" or "binary"
        results file format -- also more portable.

  3. autoclass-c/prog/search-control.c -
        In "autoclass_search" use make_and_validate_pathname and
        search parameter "save_compact_p" to determine file extension
        of "results" file prior to calling validate_results_pathname.

        Add "read_compact_p" search parameter for use in reading
        "results" and "checkpoint" files.

        Make short search trial printout more portable.

  4. autoclass-c/load-ac; autoclass-c/prog/autoclass.make.*
        Define make files with -I and -L parameters for SunOS 4.1.3 and
        change naming convention: .sun. => .sunos. or .solaris.
        Specifically the files are now --
        autoclass.make.solaris.cc, autoclass.make.solaris.gcc,
        autoclass.make.sunos.acc, and autoclass.make.sunos.gcc

  5. autoclass-c/prog/io-read-data.c, autoclass.h -
        In "translate_discrete", allocate space for translations
        using (strlen( value) + 1), rather than sizeof(shortstr) --
        prevents corruption of discrete data translation tables when
        translations are longer than (SHORT_STRING_LENGTH - 1) = 40
        characters. In "get_line_tokens" and "read_from_string", add
        length checking for "form"; make it and length check for
        "datum_string" explicit.  Increase output string length in
        "output_created_translations".

  6. autoclass-c/prog/io-read-data.c, autoclass.h -
        Increase from 3000 to 20000 the value of VERY_LONG_STRING_LENGTH 
        to handle very large datum lines.

  7. autoclass-c/prog/io-results.c -
        In VALIDATE_RESULTS_PATHNAME and VALIDATE_DATA_PATHNAME,
        use binary_file, rather than file, were it is intended.

  8. autoclass-c/prog/intf-reports.c, io-read-data.c, autoclass.h -
        Increase DATA_ALLOC_INCREMENT from 100 to 1000 for reading very
        large datasets.  Add DATA_ALLOC_INCREMENT logic of READ_DATA
        to XREF_GET_DATA.  This will prevent segmentation faults
        encountered when reading very large .db2 files into the 
        reports processing function of AutoClass.

  9. autoclass-c/prog/autoclass.make.solaris.cc, autoclass.make.solaris.gcc,
      autoclass.make.sunos.acc, and autoclass.make.sunos.gcc -
        Comment out "depend: $(SRCS)", so that all source files are not
        compiled even when only one file changes.

 10. autoclass-c/prog/intf-reports.c -
        In FORMAT_DISCRETE_ATTRIBUTE, do not process attributes with
        warning or error messages -- this prevents segmentation faults.

        In XREF_GET_DATA, free database allocated memory after it is 
        transferred into report data structures.  This reduces the
        amount of memory required when generating reports for very
        large data bases, and prevents running out of memory. 

        In all functions calling malloc/realloc for dynamic memory
        allocation, checks have been added to notify the user if
        memory is exhausted.

 11. autoclass-c/load-ac & autoclass-c/prog/autoclass.make.hp.cc -
        Port the "make" file for HP-UX operating system using the
        bundled "cc" compiler.


======================================================================





	AUTOCLASS C VERSION 2.7 NOTES 
====================================================================== 
======================================================================

Documentation:
------------------------------

  1. autoclass-c/doc/search-c.text -
        Add documentation for search parameter "interactive_p".  This
        will allow AutoClass to be run as a background task, since it
        will not be querying standard input for the "quit" character.



Programming:
------------------------------						

  1. autoclass-c/prog/globals.c -
        Update "G_ac_version" to 2.7.  Add "G_interactive_p".

  2. autoclass-c/prog/globals.h -
        Add "G_interactive_p".

  3. autoclass-c/prog/utils.c -
        In "char_input_test", test for "G_interactive_p" -- if false,
        do not do the test.

  4. autoclass-c/prog/search-control.c -
        In "autoclass_search", process "interactive_p" from the
        search parameters file, and output advisory message if set to
        false.

  5. autoclass-c/prog/search-control-2.c -
        In "print_initial_report", notify user that "typing q to quit"
        is not functional when "interactive_p" = false.

======================================================================





	AUTOCLASS C VERSION 2.6 NOTES 
====================================================================== 
======================================================================

Documentation:
------------------------------

  1. 


Programming:
------------------------------						

  1. autoclass-c/prog/globals.c -
        Update "G_ac_version" to 2.6.

  2. autoclass-c/prog/model-transforms.c -
        In "generate_singleton_transform", correct segmentation fault
        which occurs when more than 50 type = real, subtype = scalar
        attributes are defined in the ".hd2" & ".model" files.

        In "log_transform", use "safe_log" to transform values --
        prevent "log: SING error" error messages.

  3. autoclass-c/prog/model-expander-3.c -
        In "check_term", since att_info can be realloc'ed in
        for transformed attributes, reset data_base->att_info for each
        time thru loop.

  5. autoclass-c/prog/utils-math.c -
        Add "safe_log".

  6. autoclass-c/prog/autoclass.h -
        Add function prototype for "safe_log".

  7. autoclass-c/prog/model-multi-normal-cn.c -
  	In "multi_normal_cn_model_term_builder" change log calls to 
	safe_log to prevent "log: SING error" error messages.

  8. autoclass-c/prog/model-single-normal-cm.c -
	In "build_sn_cm_priors" and "single_normal_cm_model_term_builder"
	change log calls to safe_log to prevent "log: SING error" error
	messages.

  9. autoclass-c/prog/model-single-normal-cn.c -
	In "build_sn_cn_priors" and "single_normal_cn_model_term_builder"
	change log calls to safe_log to prevent "log: SING error" error
	messages.

 10. autoclass-c/prog/search-control.c -
	In "autoclass_search" test for user overriding of search parameters
	randomize_random_p and/or start_fn_type.  If done, ask for
	confirmation to proceed.


======================================================================





	AUTOCLASS C VERSION 2.5 NOTES 
====================================================================== 
======================================================================

Documentation:
------------------------------

  1. autoclass-c/doc/reports-c.text -
        Minor typographical changes.  Added new report generation
        parameter: order_attributes_by_influence_p.  Its default
        value is true.  The file extension of the influence values
        report has been changed from ".influ-text-1" to ".influ-o-text-1"
        when order_attributes_by_influence_p = true, and to
        ".influ-no-text-1" when order_attributes_by_influence_p = false.

  2. autoclass-c/doc/interpretation-c.text -
        Minor changes to the text.

  3. autoclass-c/sample/imports-85c.influ-o-text-1
        Influence values report has been significantly revised and
        reformatted.

  4. autoclass-c/doc/search-c.text -
        Corrected definition of fixed_j.


Programming:
------------------------------						

  1. autoclass-c/prog/globals.c -
        Update "G_ac_version" to 2.5.

  2. autoclass-c/prog/intf-reports.c, utils.c -
        Formatting change to "format_real_attribute" for multiple
        multivariate attribute groups.

        Remove covariance matrix output and reformat the correlation
        matrix output to fixed decimal point notation.

        For the influence values report, sort real valued attributes
        of the same model group by the first significance value, if
        that group is multi_normal_cn.

        For discrete attributes: relabel the headers "Prob", rather than
        "Mean"; and correct the instance value significance computation
        to be "local_prob * log( local_prob / global_prob)".

  3. autoclass-c/prog/autoclass.h -
        Add #ifndef for MAXPATHLEN.

  4. autoclass-c/prog/io-results.c -
        In "validate_data_pathname", "validate_results_pathname", &
        "make_and_validate_pathname", only do fclose, if fopen returns
        non-NULL.

  5. autoclass-c/prog/search-control-2.c -
        Add "pad" argument to "print_search_try".

  6. autoclass-c/prog/intf-extensions.c -
        Formatting change to "get_models_source_info".

  7. autoclass-c/load-ac,
     autoclass-c/prog/autoclass.make.sun.gcc, autoclass.make.sun.acc,
     autoclass.make.sun.cc, autoclass.make.sgi -
     (remove autoclass.make.sun)
        Add SunOS/Solaris C compiler support.

  8. autoclass-c/prog/io-results.c, io-read-model.c, io-read-data.c,
     utils.c, intf-reports.c, getparmas.c -
        Cast return values of "strlen" to int.

  9. autoclass-c/prog/model-transforms.c -
        In "generate_singleton_transform", correct segmentation fault
        which occurs when more than 25 type = real, subtype = scalar
        attributes are defined in the ".hd2" & ".model" files.

 10. autoclass-c/prog/struct-data.c, io-results.c, io-results-bin.c -
        Properly initialize att_info array when it exceeds preallocated
        size. 

 11. autoclass-c/load-ac,
     autoclass-c/prog/autoclass.make.linux.gcc, autoclass.make.sun.*,
     autoclass.make.sgi, fcntlcom-ac.h -
        Thanks to Andrew Lewycky <plewycky@oise.on.ca>, added mods for
        port to Linux version 1.2.10, GCC version 2.5.8, libc version
        4.6.25.

 12. autoclass-c/prog/model-single-multitnomial.c -
        In "sm_params_influence_fn", add check for out-of-bounds 
        arguments to the log function to prevent "log domain" errors.


======================================================================





	AUTOCLASS C VERSION 2.0 NOTES 
====================================================================== 
======================================================================

Documentation:
------------------------------

  1. autoclass-c/doc/search-c.text -
        Added new ".s-params" parameter screen_output_p, whose default
        value is true.  If false, no output is directed to the screen.
        Assuming log_file_p = true, output will be directed to the
        log file only.

  2.  autoclass-c/doc/introduction-c.text, & prediction-c.text -
        Added "prediction-c.text" to document the prediction mode of
        AutoClass C, which uses a "training" classification to predict
        probabilistic class membership for the cases of a "test" data
        file.


Programming:
------------------------------						

  1. autoclass-c/prog/io-results.c -
        In "read_class_DS_s", add debugging info to use with
        G_clsf_storage_log_p.

  2. autoclass-c/prog/struct-class.c -
        In "build_class_DS", add debugging info to use with
        G_clsf_storage_log_p.

  3. autoclass-c/prog/io-results-bin.c -
        In "load_class_DS_s," add debugging info to use with
        G_clsf_storage_log_p.

  4. autoclass-c/prog/struct-data.c -
        In "expand_database", to handle partial databases, read
        G_s_params_n_data.

  5. autoclass-c/prog/globals.c, globlals.h, search-control.c -
        Add G_s_params_n_data.   Change G_ac_version to 2.0 in 
        globals.c.

  6. autoclass-c/prog/io-read-data.c, autoclass.h -
        In "read_data" test on n_data was off by 1.

        In "output_created_translations" add discrete value occurrance
        count.

        In "read_data" move "output_created_translations" call to
        "output_att_statistics".

        Add "output_att_statistics" & "output_real_att_statistics".

        In "create_warn_err_ds", move malloc out of declaration.

  7. autoclass-c/prog/prints.c, autoclass.h -
        Add "sum_vector_f" for debugging.

  8. autoclass-c/prog/autoclass.c -
        Make "main" arg list conform to ANSI C.

  9. autoclass-c/prog/model-transforms.c -
        In "generate_singleton_transform", call "output_real_att_statistics"
        for each transformed attribute.

 10. autoclass-c/prog/utils.c -
        In "randomize_list" do limit check on list index.

 11. autoclass-c/prog/search-control-2.c -
        In all convergence functions, allocate mallocs in body of function,
        rather than in local variable declarations.

        In "get_search_DS", move malloc out of declaration.

 12. autoclass-c/prog/intf-reports.c -
        In "xref_get_data", use n_real_att - 1, rather than i, for index to
        real_attribute_data; and n_discrete_att - 1 for discrete_attribute_data.
        Corrects garbage output when .r-params parameter
        "xref_class_report_att_list" contains mixed real and discrete attributes.

        In "xref_class_report_attributes", use %g, rather than %f for real data.

        In "xref_output_line_by_class", handle unknown real values.

 13. autoclass-c/prog/io-read-data.c, io-results.c, io-results-bin.c,
                fcntlcom-ac.h -
        Convert binary i/o from non-standard (open/close/read/write) to
        ANSI (fopen/fclose/fread/fwrite).

 14. autoclass-c/prog/search-control.c, search-basic.c, search-control-2.c,
                utils.c, globals.c, globals.h, init.c -
        Convert from srand/rand to srand48/lrand48 for random number
        generation.

 15. autoclass-c/prog/predictions.c -
        Add this file to implement the "autoclass -predict ..." capability,
        which allows cases in a "test" data set to be applied to a
        "training" data set and have their class membership predicted.
        Use "prediction_p" and global "G_training_clsf" in "io-read-data.c"
        to force the "test" database to use the same discrete translations
        as the "training" database.

 16. autoclass-c/load-ac; autoclass-c/prog/autoclass.c, autoclass.make,
                io-results.c, & autoclass.h -
        Changes to support item 15.

 17. autoclass-c/prog/struct_data.c, struct-clsf.c, & struct-model.c -
        In "att_ds_equal_p", check for type = dummy. Remove
        "db_DS_same_source_p" and use "db_same_source_p", instead.

 18. autoclass-c/prog/search-control.c -
        Make FILE * type local variables static, since they are passed to other
        functions.

 19. autoclass-c/prog/autoclass.make -
        Compile code with "-g", rather than "-ggdb" option.

 20. autoclass-c/load-ac & autoclass-c/prog/autoclass.make.sun,
     autoclass-c/prog/autoclass.make.sgi -
        Changes to support SGI IRIX version 5.2 with "cc" compiler.

 21. autoclass-c/prog/io-read-data.c -
        In "output_warning_msgs", replaced sizeof(msg) with msg_length
        in first safe_sprintf call to prevent:
        "ERROR: vsprintf produced 80 chars (max number is 3) -- called
                by output_warning_msgs
        Program received signal SIGABRT, Aborted."

======================================================================





	AUTOCLASS C VERSION 1.5 NOTES 
====================================================================== 
======================================================================

Documentation:
------------------------------

  1. autoclass/doc/introduction-c.text, kdd-95.ps, tr-fia-90-12-7-01.ps -
        Postscript papers are now included as postscript, instead of
        uuencoded postscript.

  2. autoclass/doc/preparation-c.text -
        Added binary data file input option.


Programming:
------------------------------						

  1. autoclass-c/prog/autoclass.c -
        In "main", call "validate_data_pathname" to allow either .db2 ("ascii")
        or .db2-bin ("binary") data file extensions.  The identifying header of
        a .db2-bin file is
        - ".db2-bin" - char[8]
        - 32-bit integer with byte-length of each data case.
        The data cases follow in binary "float" format -- 32 bit fields.

  2. autoclass-c/prog/io-results.c -
        Add "validate_data_pathname".

  3. autoclass-c/prog/autoclass.h -
        Function prototype definition change/addition.  Add DATA_BINARY_FILE_TYPE.
        Change character array variables of length MAX_PATHNAME_LENGTH (81) to
        variables of type fxlstr (length 160) to handle very long file
        pathnames.  #define M_PI if not defined -- needed under Solaris.  Use
        pow rather than exp2, since exp2 not available under Solaris gcc 2.6.3.

  4. autoclass-c/prog/io-read-data.c -
        In "read_database" change NULL to FALSE, so that int/int rather than
        int/ptr comparison is made. Detected by Solaris GNU gcc.

        "read_database", "read_data" and "read_database_doit" modified to handle
        binary data files.

  5. autoclass-c/prog/globals.h, globals.c -
        Add G_data_file_format.

  6. autoclass-c/prog/search-control.c -
        In "autoclass-search" do not open/close ".db2" data file.

        Check for non-NULL "best_clsfs" prior to writing ".results[-bin]"
        file.

  7. autoclass-c/prog/struct-data.c -
        In "expand_database", call "validate_data_pathname" to allow either
        .db2 ("ascii") or .db2-bin ("binary") data file extensions.

  8. autoclass-c/prog/search-basic.c -
        Modified "generate_clsf"'s call to "read_database".

  9. autoclass-c/prog/utils.c, io-read-data.c, io-results-bin.c & io-results.c -
        Since the include file <sys/fcntlcom.h> is not available in the Solaris
        GNU gcc implementation, hard code them in "fcntlcom-ac.h".  Solaris 2.4
        fails open, unless fopen/fclose is done first.

 10. autoclass-c/load-ac -
        Add "fcntlcom-ac.h".  Use "clean" make target.

 11. autoclass-c/prog/search-control-2.c -
        In "print_report", do not use NULL as value of delta_ln_p.

        In "print_final_report", corrected the overwriting of a string array
        in cases where long pathnames are used.

 12. autoclass-c/prog/utils.c, intf-reports.c, search-control.c, & getparams.c -
        Correct compiler warnings found by Solaris gcc version 2.6.3.

 13. autoclass-c/prog/init.c -
        In "init", use getcwd, rather than getwd for Solaris compatibility.
   
 14. autoclass-c/prog/autoclass.make -
        Include "clean" target.  Add compiler options "-pedantic -Wall".

 15. autoclass-c/prog/utils.c -
        Add "safe_sprintf", and use it in other programs in lieu of "sprintf"
        to detect string overwrites.  Corrected string overwrite which caused
        abort and the message "Premature end of file reading symbol table".

 16. autoclass-c/prog/intf-reports.c -
        In "search_summary" change search->n to search->n_tries to prevent
        segment violation when there are duplicates.

======================================================================