  We propose a new classification for the entanglement in graph states based on
generalized con- currence. The numerical results indicate that the eight
different three-qubit graph states in three categories, 64 four-qubit graph
states in five categories and 1024 five-qubit graph states are in ten classes.
We also compare this classification with equivalence classes of these graph
states under local complementation (LC) operator, and the obtained result
suggests that classification by generalized concurrence is not in contradiction
with the LC-rule.
