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Chapter 3 Specifying a File Designation

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Table of Contents
MPE/iX File Designators
User-Defined Files
Lockwords
Backreferencing files
System-Defined Files
Input/Output sets
Passed files
Using Command Interpreter Variables and Expressions Within File Designators
Parsing and Validating File Designators
The name by which a program recognizes your file is its formal file designator. This is the file name that is coded into the program, along with the program's specifications for the file.

The formal file designator is the name by which your program recognizes the file, but there must also be a means by which the file system can recognize it, allowing it to be referenced by various commands and programs. This chapter discusses the various ways MPE/iX allows you to designate a name for your file.

As you read this chapter, keep these considerations in mind:

  • How will the file be referenced?

  • How will the file be used?

  • How does MPE/iX associate formal and actual file designators?



Specifying Storage Format

MPE/iX File Designators