There is only one file type that uses the .MARSHAL extension:
Marshal Data Migration Model File
Data model file created by Marshal Editor, a tool used for migrating, integrating, and archiving data; contains an XML specification for data sets that have been imported or exported; used for storing data migration settings between multiple databases; also used for executing scheduled jobs with the Marshal Archiver tool.
The Marshal Editor installation includes the Marshal SQLUtility, which can connect to any ODBC compliant database. Once connected, the software provides utilities to view the data schema and translate it into another format. MARSHAL files are used to store the work done during this process.
The Marshal SQLUtility is also available as a standalone installation.
Updated: November 19, 2010