  We examine the general lagrangian for baryon chiral perturbation theory with
SU(3) flavor symmetry, up to the next-to-leading order. We consider both the
strong and the weak interaction. The inverse of the baryon mass is treated as
an additional small expansion parameter, and heavy fermion effective field
theory techniques are employed to provide a consistent expansion scheme. A
detailed account is given on the restrictions imposed on the lagrangian by the
various symmetries. Corrections due to the finite baryon mass are also
discussed.
