Upload and Download File Format Protocols

Access materials that provide guidance on the file formats and programmatic actions required for uploading to and downloading information from the ISO’s applications and systems.

Materials below include:

• Settlement Market System Document Type Definitions (SMS DTDs) for XML upload files used by the SMS application, which allows the user to load internal bilateral transactions (IBTs) within the ISO marketplace
• New England External Transaction Tool (NEXTT) Document Type Definitions (NEXTT DTDs) for XML upload files used by the NEXTT application, which allows the user to load new external schedules for consideration in the Real-Time Energy Market or the Day-Ahead Energy Market
• SMD Application File Format Protocols for files used with other SMD applications

See the MIS Report Descriptions, Templates, and Samples page to access materials that provide guidance for ISO reports on bill details, settlements, operation information, and more.