Extract text from Data dictionary models (DDM)
To convert DDM Models to another format, you need erwin Data Modeler or other Database software.
To convert other file formats to the "Data Schema File" file type, you need software like erwin Data Modeler or a similar tool.
The .ddm extension is a multi-purpose container most frequently associated with Data Dictionary Models created by erwin Data Modeler (now part of Quest Software). These files serve as the architectural blueprints for enterprise databases, storing schemas, entity-relationship diagrams (ERD), and metadata definitions. Users typically need to convert these files to share database structures with stakeholders who do not have a license for the expensive modeling software, or to generate usable SQL scripts for deployment.
A major friction point is that .ddm files are proprietary and version-sensitive; a file saved in a newer version of erwin often cannot be opened in legacy versions. Furthermore, the extension is reused by other specialized tools: Alpha Anywhere (formerly Alpha Five) uses it for Data Dictionary Memos, MIKE Powered by DHI uses it for hydraulic modeling data, and Dynamic Designer uses it for motion simulation.
For database documentation, the best target format is PDF or HTML (for read-only web viewing). For interoperability with other database tools, converting to XML or standard SQL DDL (Data Definition Language) files is recommended. For MIKE simulation data, users often need to export to CSV or Shapefile (SHP) for use in GIS software.
Convert.Guru analyzes your DDM file, detects the exact format, and lets you read the text inside.
Users also converted SN4, SN1 and SN2 files.
If you want to convert DDM file to , you can use erwin Data Modeler or similar software from the "Database Schema Modeling" category. In the File menu, look for Save As… or Export….
To convert files to DDM, try erwin Data Modeler or another comparable tool in the "Database Schema Modeling" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our DDM converter.