  In particle collisions at energies higher than the mass scale involved, the
collinear splitting becomes the dominant phenomena. Suitable descriptions of
the physics in this regime include the parton distribution functions, the
initial state radiations, the final state radiations and the fragmentation
functions. It is of fundamental importance to formulate those functions with
consistent theoretical treatments, and to provide the adequate formalism for
applications, as motivated by the recent discussions of partonic scatterings at
the multi-TeV energy regime. In this report, we briefly present the resummation
of the final-state logarithms as fragmentation functions for the electroweak
processes. As an explicit example, we study an electroweak gauge boson
splitting in the process $pp\to WZj$ and demonstrate the important effects from
the fragmentation.
