There are 2 file types use the .MSL file extension:
1. Magick Scripting Language File
Script written for ImageMagick, an open source tool for converting and manipulating images; written in the Magick Scripting Language (MSL), an XML-based language used by conjure, ImageMagick's library for performing custom image processing tasks.
Updated: June 10, 2013
2. Mapping Specification Language File
Developer file used by some programs developed with Microsoft's Entity Framework, which is part of the .NET development tool suite; describes a mapping between a conceptual data model and the underlying storage model; provides a layer of abstraction for increased flexibility between the application and the underlying storage technology.
Updated: February 12, 2013