This report provides a pedagogical introduction to the description of the g
eneral Poincare supergravity/matter/Yang-Mills couplings using methods of K
ahler superspace geometry. At a more advanced level this approach is genera
lized to include tensor field and Chern-Simons couplings in supersymmetry a
nd supergravity, relevant in the context of weakly and strongly coupled str
ing theories. (C) 2001 Elsevier Science B.V. All rights reserved.