Simplification and harmonization of trade data and documentary requirements can contribute significantly to the reduction of time and costs for international trade transactions. Harmonizing data used in trade documents and aligning them with international standards ensure data interoperability among the various parties engaged in a trade transaction. In particular, harmonization is a necessary step toward trade automation and the introduction of electronic Single Window facilities. Data harmonization, an act of reconciling the definition and representation formats of data elements in a domain of interest, is a prerequisite in introducing a system for electronic data sharing and exchange.