  Physical quantities such as, entropy, dimensions and multifractal
characteristics of multiplicity distributions of charged particles produced in
$^{197}$Au-AgBr collisions are examined and the findings are compared with the
predictions of Monte Carlo model URQMD (Ultra-Relativistic Quantum Molecular
Dynamics) and HIJING (Heavy Ion Jet INteraction Generator) and also with the
results reported earlier in hadron-hadron and nucleus-nucleus collisions at
different energies. Based on their azimuth distribution, the charged particles
produced within narrow-bins exhibit two kinds of substructures, namely,
ring-like and jet-like substructures. Thus, on applying the suitable criteria
the two different types of events are identified and analyzed separately. It is
observed that the maximum entropy production occurs around a narrow
mid-rapidity region. The analyses of ring-like and jet-like events suggest that
the entropy production is much larger in ring-like events as compared to that
in jet-like events. Furthermore, Renyi's order-q information entropy is used to
estimate the multifractal specific heat and to construct the spectrum of
scaling indices. The findings reveal that the value of multifractal specific
heat is higher in ring-like events as compared to that in jet-like events. The
studies of generalized dimension and multifractal spectrum indicate that the
multifractality is rather, more pronounced in ring-like events as compared to
jet-like events. Various features of the experimental data are noticed to be
nicely reproduced by the URQMD model
