Purpose of Each Chapter
At the beginning of each chapter is a statement about the purpose of the chapter.
Following that are headings and page numbers where you can find specific
information.
Examples
Throughout the book, you will find examples that you can try as you read. If the
example is a REXX keyword instruction, the REXX keyword is in uppercase.
Information that you can provide is in lowercase. The following REXX keyword
instruction contains the REXX keyword SAY, which is fixed, and a phrase, which
can vary.
SAY 'This is an example of an instruction.'
Similarly, if the example is a TSO/E command, the command name and keyword
operands, which are fixed, are in uppercase. Information that can vary, such as a
data set name, is in lowercase. The following ALLOCATE command and its
operands are in uppercase and the data set and file name are in lowercase.
"ALLOCATE DATASET(rexx.exec) FILE(sysexec) SHR REUSE"
This use of uppercase and lowercase is intended to make a distinction between
words that are fixed and words that can vary. It does not mean that you must type
REXX instructions and TSO/E commands with certain words in uppercase and
others in lowercase.
Exercises
Periodically, you will find sections with exercises you can do to test your
understanding of the information. Answers to the exercises are included when
appropriate.
Where to Find More Information
Please see z/OS Information Roadmap for an overview of the documentation
associated with z/OS, including the documentation available for z/OS TSO/E.
Accessing Licensed Books on the Web
z/OS licensed documentation in PDF format is available on the Internet at the IBM
Resource Link Web site at:
http://www.ibm.com/servers/resourcelink
Licensed books are available only to customers with a z/OS license. Access to
these books requires an IBM Resource Link Web userid and password, and a key
code. With your z/OS order you received a memo that includes this key code.
To obtain your IBM Resource Link Web userid and password log on to:
http://www.ibm.com/servers/resourcelink
To register for access to the z/OS licensed books:
1. Log on to Resource Link using your Resource Link userid and password.
2. Click on User Profiles located on the left-hand navigation bar.
3. Click on Access Profile.
4. Click on Request Access to Licensed books.
5. Supply your key code where requested and click on the Submit button.
xiv z/OS V1R1.0 TSO/E REXX User’s Guide
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