17. A system according to claim 15, wherein the processor is further configured to generate the index entry by encoding the concatenation of adjacent portions of the information to form the first entry and encoding each of the respective locations of the phrase within the information to form each the one or more second entries.
18. A system according to claim 17, wherein the processor is further configured to generate the index entry by encoding a first portion of each respective location of the phrase within the information to form each of the one or more second entries.