FGL Utilizes a number of file types ranging from raw source, active pages, libraries, data files, databases, dynamic caching and compression, and more, including:
Programming-Related File Types:
| AP | Active Page |
| APX | Pre-Compiled Active Page |
| FGL | FGL Source File |
| FGX | Pre-Compiled FGL Source File |
| FLB | FGL Library |
| EXE | FGL Executable |
| CACHE | CSV Cache |
Data-Related File Types:
| DB | Database |
| DBI | Database Definition |
| DX | Index |
| BLB | BLOB (Binary Large Object) |
| INI | Configuration |
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