# Conventions used in This Manual

For clarity, certain conventions are followed in this manual in a consistent fashion. If you learn these conventions, your comprehension will be just that much easier.

- Command parameters bracketed in angle brackets < like this > represent some sort of information that you must pass to the program, such as a file name.
- Command parameters bracketed in brackets [ like this ] are optional.
- Text written in a monospaced font -- `Like This` -- represent what you are typing, or often represents the contents of a batch file or program listing.

#### Port Conventions

Port commands are a subset of Resource Manager commands. They are used to open, activate, close, and gain ownership of DLG's communication ports.

Shell commands supplied with DLG either return a 0 for no error, or error 10 indicating some level of error. This information pertains ONLY to those functions (Arexx, etc) that return meaningful, detailed error information. Unless indicated otherwise, the commands will return a 0 for no error. Otherwise, the error code will come from the list of Resource Manager error codes.