 While LR("k") grammars have equal generative power for all "k"≥1, the case of LR(0) grammars is slightly different.A language "L" is said to have the "prefix property" if no word in "L" is a proper prefix of another word in "L".A language "L" has an LR(0) grammar if and only if "L" is a deterministic context-free language with the prefix property.