Using Externally Described WORKSTN Files

*.. 1 ...+... 2 ...+... 3 ...+... 4 ...+... 5 ...+... 6 ...+... 7 ..* AAN01N02N03T.Name++++++RLen++TDpBLinPosFunctions++++++++++++++++++++*

A** ITEM MASTER INQUIRY

 

 

 

A

 

 

 

REF(DSTREF) .1/

A

R PROMPT

 

 

TEXT('Item Prompt Format')

A

73N61

 

 

OVERLAY .2/

A

 

 

 

CA03(98 'End of Program') .3/

A

 

 

1

2'Item Inquiry'

A

 

 

3

2'Item Number'

A

ITEM

R

I 3 15PUTRETAIN .4/

A

61

 

 

ERRMSG('Invalid Item Number' 61).5/

A

R RESPONSE

 

 

TEXT('Response Format')

A

 

 

 

OVERLAY .2/

A

 

 

 

LOCK .6/

A

 

 

5

2'Description'

A

DESCRP

R

5

15

A

 

 

5

37'Price'

A

PRICE

R

5

44

A

 

 

7

2'Warehouse Location' .7/

A

WHSLOC

R

7

22

A

 

 

9

2'On Hand'

A

ONHAND

R

9

10

A

 

 

9

19'Allocated' .8/

A

ALLOC

R

9

30

A

 

 

9

40'Available'

A

AVAIL

R

9

51

A*

 

 

 

 

Figure 165. Example of the Data Description Specifications for a Display Device File

This display device file contains two record formats: PROMPT and RESPONSE

.1/ The attributes for the fields in this file are defined in reference file.

.2/ The OVERLAY keyword is used so that both record formats ca used on the same display.

.3/ Function key 3 is associated with indicator 98, which is use grammer to end the program.

.4/

The PUTRETAIN

keyword

allows

the

value

that is entered

in

the

 

field to

be

kept

in

the

display.

In

addition, the

ITEM

fie

 

input field by the I in position

38. ITEM is the only

input

 

record formats. All of the other fields in the record

are

 

position

38

is

blank

for each

of

them.

 

 

.5/ The ERRMSG keyword identifies the error message that is disp indicator 61 is set on in the program that uses this record

.6/

The

LOCK keyword prevents the work-station

user from

using the

 

board when the RESPONSE

record format is

initially-displayed.

.7/

The

constants such as ‘Description’, ‘Price’, and ‘Warehouse Loc

 

describe the fields

that are written

out by the

program.

.8/ The line and position entries identify where the fields or written on the display.

Chapter 18. Using WORKSTN Files333

Page 357
Image 357
IBM AS/400 manual Refdstref, Prompt, Overlay, Descrp, Price, Whsloc, Onhand, Avail

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.