A file with .btr extension is a database file created by Btrieve transactional database application. Unlike relational database management systems (RBMS), Btrieve is based on Indexed Sequential Access Method (ISAM), which is a way of storing data for fast retrieval. The BTR file stores a collection of records and is used to generate reports as per requirements. BTR files can be opened using Pervasive Btrieve Database Manager, Pervasive PSQL Maintenance Utility, and Legend Software BTRIEVE Viewer.
BTR File Structure - More Information
The internal data structure and alignment of each byte in the structure of a BTR file is not publicly available. However, Btrieve
provides the Btrieve API that can be used to read the information from BTR files. It is compatible with the following programming languages and development environments.
Micro Focus COBOL
Microsoft Visual Basic
Microsoft Visual C++
Retrieving data from a BTR file is dependent on the associated DDF file with it. Without the DDF, it won’t be easy to retrieve the information from such a file.