List-Retrieval Engine Table Conversion Wrapper

A list-retrieval engine is an optimized database engine that provides and manages access to XML repository files. Each XML list repository file is a pair of index and data files with *.idb and *.ddb extensions. The .idb file keeps an index that is generated on a data file, and the .ddb file keeps data that is generated by the table conversion engine. TCWrapper is a system module that aggregates list-retrieval and list-processing APIs from TCEngine and list-retrieval engine and provides a uniform access to the data for XML List.