Reading Syntax Diagrams

Appendix C. The Create Commands

This section provides information on:

¹ Using CL commands

¹ Syntax diagram and description of CRTBNDRPG

¹Syntax diagram and description of CRTRPGMOD

For

information on the Create Program and Create Service Program commands

see

theCL Reference (Abridged).

Using CL Commands

Control Language

(CL)

commands

, parameters

, andkeywords

can be

entered

in

either

uppercase

or lowercase

characters.

In the

syntax diagram

in

uppercase (for example, PARAMETER, PREDEFINED-VALUE). Variables

appear in

lowercase italic lettersuser(for-definedexample,-value). Variables are

user-defined

names or

values.

 

 

 

How to Interpret Syntax Diagrams

The syntax diagrams in this book use the following conventions:

5533PARAMETER33(33-333333333333333333-33user-defined-value33)3333333333333333333333333335% ,3PREDEFINED-VALUE32

Figure

213. Structure of a Syntax Diagram

Read

the syntax diagram from left to right, and from top to bottom,

path

of the line.

The 5533 symbol indicates the beginning of the syntax diagram.

The 335% symbol indicates the end of the syntax diagram.

The 3335 symbol indicates that the statement syntax is continued on th

The 5333 symbol indicates that a statement is continued from the previ

The 33(33)33 symbol indicates that the parameter or value must be ente parentheses.

Required

parameters

 

appear on the base line

and

mustOptionalbe

entered.

parameters

appear

below the

base line

and

do

not

need

to

be

enter

lowing

sample,

you

must

enter

REQUIRED-PARAMETER

and

a

value

for

it,

but

you

do

not

need

to

enter

OPTIONAL-PARAMETER

or

a

value for

it.

 

 

Copyright IBM Corp. 1994, 1999

405

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IBM AS/400 Appendix C. The Create Commands, Using CL Commands, How to Interpret Syntax Diagrams, Reading Syntax Diagrams

AS/400 specifications

The IBM AS/400, now known as the IBM iSeries, is a midrange computer system that has been a cornerstone of enterprise computing since its introduction in 1988. Designed to provide a robust platform for business applications, the AS/400 is celebrated for its reliability, scalability, and integrated database capabilities.

One of the key features of the AS/400 is its Integrated Operating Environment, which blends hardware and software resources seamlessly. This integration allows businesses to execute diverse workloads, ranging from traditional applications to modern web-based services, all on a single platform. The operating system, OS/400 (now IBM i), offers a rich set of APIs and tools for developers, simplifying application development and management.

Another standout characteristic of the AS/400 is its built-in database, DB2 for i. This powerful relational database management system allows for efficient data handling and provides advanced features such as support for SQL, XML, and JSON, making it easier for businesses to manage their data and integrate it with other systems. The database's tight integration with the operating system enables high performance and security.

In terms of scalability, the AS/400 can accommodate small businesses as well as large enterprises, with the ability to support hundreds of users simultaneously. Its architecture allows for easy upgrades in hardware, meaning that organizations can scale their systems without replacing the entire infrastructure.

Security is another critical attribute of the AS/400. With a sophisticated security model, it offers built-in user authentication, access control, encryption, and auditing capabilities to protect data and applications from unauthorized access.

The AS/400 also supports multiple programming languages, including RPG, COBOL, Java, and PHP, giving organizations the flexibility to choose the development tools that best fit their needs. This diversity helps maintain legacy applications while also developing new ones that leverage modern technologies.

Moreover, the platform supports both traditional green-screen interfaces and modern graphical user interfaces, allowing organizations to transition smoothly into contemporary user experience paradigms.

Overall, the IBM AS/400 stands out as a resilient, flexible, and secure computing platform that enables organizations to effectively manage their business operations, streamline processes, and adapt to changing market demands. Its unique combination of integrated features and capabilities ensures that it remains relevant in today's fast-paced technology landscape.