1. A computer based system for processing data during decompression, comprising: a back buffer for receiving a data stream, wherein the data stream comprises one or more data segments; a parser module for generating parsed forms within the back buffer for one or more encountered data segments of the data stream; an annotation storage means for storing annotation information, wherein the annotation information comprises a representation of a parsed form for a data segment and location information within the back buffer for a generated parsed form of the data segment; and referencing means for referencing the annotation information to obtain the parsed form for an occurrence of a previously encountered data segment within the data stream.