The production rates of D*+/- D-s(*+/-), D+/-, D-0/(D) over bar(0), D-s(+/-
), and Lambda(c)(+)/<(Lambda)over bar>(-)(c) in Z --> c (c) over bar decays
are measured using the LEP I data sample recorded by the ALEPH detector. T
he fractional energy spectrum of the D*+/- is well described as the sum of
three contributions: charm hadronisation, b hadron decays and gluon splitti
ng into a pair of heavy quarks. The probability for a c quark to hadronise
into a D*+ is found to be f(c --> D*+) = 0.233 +/- 0.010(stat.) +/- 0.011(s
yst.). The average fraction of the beam energy carried by D*+/- mesons in Z
--> c (c) over bar events is measured to be (X-E(D*+/-))(c (c) over bar) =
0.4878 +/- 0.0046(stat.) +/- 0.0061(syst.). The D*+/- energy and the hemis
phere mass imbalance distributions are simultaneously used to measure the f
raction of hadronic Z decays in which a gluon splits to a c (c) over bar pa
ir: (n) over bar(g --> c (c) over bar) = (3.23 +/- 0.48(stat.) +/- 0.53(sys
t.))%. The ratio of the Vector/(Vector+Pseudoscalar) production rates in ch
armed mesons is found to be P-V = 0.595 +/- 0.045. The fractional decay wid
th of the Z into cc pairs is determined from the sum of the production rate
s for various weakly decaying charmed states to be R-c = 0.1738 +/- 0.0047(
stat.) +/- 0.0116(syst.).