HP SunSoft Pascal 4.0 - Manual (Page 21)

Preface xxi
•
Appendix B, “Error Messages,” lists all the error messages the compiler
produces.
This guide concludes with an index.
Conventions Used in This Guide
This guide contains syntax diagrams of the Pascal language in extended
Backus-Naur Formalism (BNF) notation. Here are the meta symbols:
The following table describes the type styles and symbols used in this guide:
Table P-1 BNF Meta Symbols
Meta Symbol Description
::= Defined as
| Can be used as an alternative
(a | b) Either a or b
[ a ] Zero or one instance of a
{ a } Zero or more instances of a
'abc ' The characters abc
Table P-2 Typographic Conventions
Typeface or
Symbol
Meaning Example
AaBbCc123 The names of commands, files, and
directories; on-screen computer output Edit your .login file.
Use ls -a to list all files.
hostname% You have mail.
AaBbCc123 What you type, contrasted with on-
screen computer output hostname% su
Password:
AaBbCc123 Command-line placeholder:
replace with a real name or value To delete a file, type rm filename .
AaBbCc123 Book titles, new words or terms, or
words to be emphasized Read the User’s Guide.
These are called class options.
You must be root to do this.