The FLAG working group reviews lattice results relevant for pion and kaon physics with the aim of making them easily accessible to the particle physics phenomenology community. The set of quantities considered so far comprises light quark masses, kaon and pion form factors, the kaon mixing parameter, and low energy constants of SU(2)_L X SU(2)_R and SU(3)_L X SU(3)_R chiral perturbation theory.
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