.EDMX File Extension

ADO.NET Entity Data Model Designer File

Developer Microsoft
3.3  |  4 Votes

What is an EDMX file?

Data model file created by the Entity Data Model Designer component of Microsoft Visual Studio; stores the schema for a database, including entities (e.g., database tables), their fields, and their relationships (e.g., one-to-one and one-to-many).

More Information

EDMX files are used for generating SQL Server database schemas. They contain three metadata files: 1) the conceptual schema definition language (CSDL) file, 2) the store schema definition language (SSDL) file, and 3) the mapping specification language (MSL) file.

NOTE: To create EDMX files, you need a version of Visual Studio that includes the ADO.NET Entity Data Model Designer.

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Programs that open or reference EDMX files

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