  We report on WIMP search results in the XENON100 detector using a
non-relativistic effective field theory approach. The data from science run II
(34 kg $\times$ 224.6 live days) was re-analyzed, with an increased recoil
energy interval compared to previous analyses, ranging from $(6.6 -
240)~\mathrm{keV_\mathrm{nr}}$. The data is found to be compatible with the
background-only hypothesis. We present 90% confidence level exclusion limits on
the coupling constants of WIMP-nucleon effective operators using a binned
profile likelihood method. We also consider the case of inelastic WIMP
scattering, where incident WIMPs may up-scatter to a higher mass state, and set
exclusion limits on this model as well.
