Version 1.0-5
    o Improved version of the C code for removing redundants, increasing the speed of the eqmcc() function
    o superSubset() and pof() now accepts "suf" (along with "sufficiency") and "nec" (along with "necessity")
    o More flexible pof() function, now accepting an outcome vector as well as a name of the outcome set
    o Multiple solutions in factorize() are now correctly numbered
    o Minor corrections to the C code, in view of the upcoming R 3.0.0 version

Version 1.0-4
    o Speed considerably increased for functions superSubset() and truthTable()
    o New argument "all.sol" for functions eqmcc() and solveChart() (thanks to Michael Baumgartner)
    o Bug fix in function eqmcc(); condition names in uppercase letters not treated correctly (thanks to Michael Baumgartner)
    o Bug fix in function truthTable(); case names not assigned correctly under some circumstances (thanks to Martin Gasser)
    o Function truthTable() now also calculates number of cases in remainder configurations
    o Arguments in function factorize() renamed

Version 1.0-3
    o Bug fixes related to printing

Version 1.0-2
    o PRI scores for arguments relation = "necessity" and neg.out = TRUE in function superSubset() corrected
    o New argument "neg.out" in functions truthTable() and eqmcc()

Version 1.0-1
    o Bug fix; printing of solution with only one term prevented

Version 1.0-0
    o QCA package now ready for fuzzy sets
    o Functions eqmcc() and truthTable() extensively reworked for compatibility with fuzzy sets
    o Function eqmcc() automatically determines conditions and outcome when fed with truth table object (of class "tt") 
    o New function pof() computes parameters of fit for variety of input options
    o New function findTh() finds thresholds for crisp sets calibrations
    o New function calibrate() recodes base variables into crisp and fuzzy sets 
    o New function superSubset() for analysing necessity and sufficiency relations
    o New logical argument "rowdom" in function eqmcc() controls application of row dominance principle
    o Truth table columns "freq0" and "freq1" dropped; columns "incl" and "PRI" added
    o Truth tables can now be sorted using argument sort.by
    o Function truthTable() now returns raw truth table with numerical columns, plus
      new component with recoded data if fuzzy sets used
    o Functions prettyTable() and createString() now internalized
    o Function findPrimes() is now findSubsets()
    o New printing methods for PI charts - objects of class "pic", parameters of fit - class "pof",
      superSubset() results - class "ss", allExpressions() - class"aE" and factorization results - class "fctr"
    o Function qmcc() now phased out and completely replaced by function eqmcc()
    o Numerous other bug fixes and improvements

Version 0.6-5
    o Functions qmcc() and eqmcc() now also return (invisibly) PI chart and initial configurations

Version 0.6-4
    o Functions qmcc() and eqmcc() now return invisible list with three components:
      - minimized PIs
      - number of k PIs necessary to cover all initial causal combinations in PI chart
      - final solution(s)
    o Redundant code from function verify.data() removed 
    o Changed error message on failure to solve PI chart (thanks to Juha Järvi)

Version 0.6-3
    o Bug fix in function factorize(); matrix dropped dimensions

Version 0.6-2
    o Function factorize() modified, argument "use.letters" replaced by "splitmethod"
    o Improved documentation and citations
    o Function findPrimes() improved, empty prime implicants eliminated (first line in implicant matrix)
    o Bug fix in function findSubsets(); incorrect calculations for the case of
      multi-value data

Version 0.6-1
    o Minor improvements to findPrimes() and findSubsets(), their first argument
      "noflevels" now must be specifically declared in the higher dimension matrix
    o Fixed a small bug in eqmcc() that prevented correct multi-value minimization
      when excluding the remainders (thanks to Damien Bol for pointing that)
    o Argument "uplow" in eqmcc() is now TRUE by default

Version 0.6-0
    o Function eqmcc() now accepts multi-value data
    o New argument "uplow" in function eqmcc() for printing solutions in upper/lower letters
    o Function findPrimes() improved to accommodate multi-value data
    o Function createString() improved to accommodate multi-value data
    o Function writePrimeimp() improved to accommodate multi-value data
    o Function demoChart() modified; argument "use.letters" replaced by "splitmethod"
    o Function prettyString() completely changed using native function strwrap()
    o Function prettyString() now internalized
    o Function qmcc() and eqmcc() changed accordingly using new function prettyString()
    o New artifical dataset "MV" to test multi-value data

Version 0.5-4
    o Eliminated error message if there is only one configuration to
      explain (thanks to Burt Monroe)

Version 0.5-3
    o Bug fix in function truthTable(); columns incorrectly arranged with respect to outcome values
    o Function truthTable() now allows multi-value data, both in conditions and outcome

Version 0.5-2
    o Bug fix in function createMatrix() regarding multi-value data
    o Bug fix in function solveChart(); error when PI chart was too large

Version 0.5-1
    o Function descriptions updated and cleaned 
    o Functions is.tt() and print.tt() now accessible by user
    o Bug fix in function rowDominance2(); matrix dropped dimensions
    o Bug fix in function eqmcc() for complete truth tables (thanks to Ronggui Huang)

Version 0.5-0
    o Function truthTable() now returns object of class "tt"
    o New internal functions is.tt() and print.tt()
    o Functions qmcc() and eqmcc() now accept truth tables as well as raw data

Version 0.4-9
    o Functions findPrimes() and findSubsets() now at user-level
    o Function factorize() improved; previous version did not detect some
      combinations

Version 0.4-8
    o New internal function findPrimes()

Version 0.4-7
    o Bug fix in rowDominance2()
    o Function eqmcc() improved
    o Function truthTable() slightly improved
    o New internal function findSubsets()

Version 0.4-6
    o Function rowDominance2() reworked
    o Function shortqca() renamed to eqmcc(); faster by a factor of at least 2

Version 0.4-5
    o New experimental function shortqca(); many times faster than qmcc() for
      large number of causal conditions (> 11) and very low memory consumption;
      can easily work with 16 or 17 causal conditions; looks very promising, 
      especially for multi-value data

Version 0.4-3
    o Bug fix in function qmcc(); matrix dropped dimensions upon subsetting

Version 0.4-2
    o Bug fix in function qmcc(); data was not correctly subset
    o Bug fix in function qmcc() involving the argument "show.cases"
    o Argument "use.letters" added to function demoChart()
    o Bug fix in function verify.truthTable()

Version 0.4-1
    o Namespace for the package added
    o Function base3rows() completely rewritten, now much faster
    o Function createMatrix() reworked; now much faster for the same number of
      values in each condition
    o Argument "diffmat" added to function qmcc(); users can now choose to
      generate differences matrix or not: speed or low memory consumption

Version 0.4-0
    o Function qmcc() reworked; substantially lower memory consumption;
      now works with up to 15 conditions in 1GB RAM
    o New function base3rows()
    o Bug fix in function writeSolution()

Version 0.3-5
    o Function qmcc() reworked; does no longer possess argument "tt";
      now works reasonably with up to 13 conditions
    o Function truthTable() reworked 

Version 0.3-1
    o New function rowDominance() eases solving of large prime implicant charts

Version 0.3-0
    o New function getRow() returns combination of levels for specific row numbers
    o Bug fixes (caused by changes in version 0.2-6)
    o Function createMatrix() now accepts multi-value sets
    o Function qmcc() now 20 times faster; works reasonably with up to 11 conditions
    o Function createChart() completely redesigned; now internal
    o Function createChart() now called demoChart()

Version 0.2-6
    o QCA does not depend on package "cluster" anymore

Version 0.2-5
    o Documentation fixes
    o Function prettyTable() almost completely rewritten
    o Minor changes to function truthTable()
    o QCA does not depend on package "combinat" anymore
    o New function sortMatrix() in internal functions
    o Argument verifications now part of internal functions
    o New function readTosmana() for reading Tosmana's XML data files

Version 0.2-2
    o Function allExpr() completely redesigned - now allExpressions() and made faster
    o Set up internal functions; qmcc now less cluttered
    o New user-level function solveChart() - pulled out of function qmcc()

Version 0.2-1
    o New function createMatrix() creates base matrix for the truth table
    o New function base3rows()
    o Bug fix in writeSolution()

Version 0.2-0
    o New function factorize() finds all common factors of literals in Boolean products