IMS browse while we are changing the program that reads it

The COBOL issues DL/I calls. For a read of the same data in the workbench, do we use JDBC or native DL/I?

Use Universal JDBC when ODBM can see the database and you want query and paging with layouts attached. Use native DL/I when you need the hierarchy the program actually walks and JDBC does not expose it. Keep the PSB scope in mind. This browse is how you confirm the data. It is not a substitute for the program's own call.