  We investigate the unpolarized pion and kaon fragmentation functions,
employing the nonlocal chiral-quark model, which manifests the nonlocal
interactions between the quarks and pseudoscalar mesons, considering the
explicit flavor-SU(3)-symmetry breaking in terms of the current-quark masses.
Moreover, we study the quark-distribution functions, derived from the
fragmentation ones with the Drell-Yan-Levi relation. Numerical results are
evaluated to higher Q^2 by the DGLAP evolution and compared with the empirical
data. The ratios between the relevant valance quark-distribution functions are
also discussed. It turns out that the present results are in relatively good
agreement with available data and other theoretical estimations.
