In the webMethods Chem eStandards Module, you can reuse mapping services for trading partners that submit the same business document format. For example, you can use the same mapping services for Trading Partner A and Trading Partner B if they use the same version of the same Chem eStandards process and they both always submit business documents in the same document format to the webMethods Chem eStandards Module. As the receiver of those documents, you only need to define one inbound mapping service for both trading partners because the document format and Chem eStandards process versions are the same. You generally cannot reuse the same mapping service for different versions of the same Chem eStandards process because the mapping service includes references to IS document types within a specific version of the Chem eStandards.