Release 10.1A: OpenEdge Development:
Internationalizing Applications

Streams and code-page conversion

Figure 2–6 shows a stream. Streams can include the following application components:

Character terminals and emulators of character terminals.
Table dump (.d) and data definition (.df) files.
Files accessed by INPUT FROM or OUTPUT TO statements.
Operating system files that an OpenEdge application reads or writes.
LISTING, XREF, and PREPROCESS files produced by the compiler.

As Figure 2–6 shows, to decide whether or not to convert the code page of data flowing between two application components, OpenEdge considers whether one of the application components is a stream. For more information on streams, see OpenEdge Development: Progress 4GL Handbook .

Streams and the PROTERMCAP file

Certain streams—namely, character terminals, emulators of character terminals, and files accessed by INPUT FROM and OUTPUT TO statements—sometimes undergo a completely different kind of character conversion, one related to the PROTERMCAP file. This file, used by OpenEdge applications that run on UNIX and that have a character interface, associates generic cursor-movement commands with the control codes required by a particular terminal.

Do not confuse data conversion related to code-page differences with data conversion related to the PROTERMCAP file. For more information on the PROTERMCAP file, see OpenEdge Deployment: Managing 4GL Applications .