Document revision date: 15 July 2002

Chapter 15
15	Using Lexical Functions to Obtain and Manipulate Information
15.1	Why Use Lexical Functions
15.2	Obtaining Information About Your Process
15.2.1	Changing Verification Settings
15.2.2	Changing Default File Protection
15.3	Obtaining Information About the System
15.3.1	Determining Your OpenVMS Cluster Node Name
15.3.2	Obtaining Queue Information
15.3.3	Obtaining Process Information
15.3.4	F$CONTEXT Lexical Function
15.4	Obtaining Information About Files and Devices
15.4.1	Searching for Devices
15.4.2	Searching for a File in a Directory
15.4.3	Deleting Old Versions of Files
15.5	Translating Logical Names
15.6	Manipulating Strings
15.6.1	Determining Presence of Strings or Characters
15.6.2	Extracting Parts of Strings
15.6.3	Formatting Output Strings
15.7	Manipulating Data Types
15.7.1	Converting Data Types
15.7.2	Evaluating Expressions
15.7.3	Determining Whether a Symbol Exists
Chapter 16
16	Understanding Processes and Batch Jobs
16.1	Interpreting Your Process Context
16.2	Using Detached Processes
16.3	Using Subprocesses
16.3.1	Using Subprocesses to Spawn Tasks
16.3.2	Using Subprocesses to Perform Multiple Tasks
16.3.3	Creating a Subprocess
16.3.4	Exiting from a Subprocess
16.3.5	Subprocess Context
16.4	Connecting to Disconnected Processes on Virtual Terminals
16.4.1	Terminal Disconnections
16.4.2	Removing Disconnected Processes
16.4.3	Managing Disconnected Processes
16.5	Working with Batch Jobs
16.5.1	Submitting Batch Jobs
16.5.2	Passing Data to Batch Jobs
16.5.3	Control of Batch Job Output
16.5.4	Changing Batch Job Characteristics
16.5.5	SUBMIT Command Qualifiers
16.5.6	Displaying Jobs in Batch Queues
16.5.7	Deleting and Stopping Batch Jobs
16.5.8	Restarting Batch Jobs
16.5.9	Synchronizing Batch Job Execution
16.5.10	Using the WAIT Command
Appendix A
Appendix A	Character Sets
Appendix B
Appendix B	Annotated Command Procedures
B.1	CONVERT.COM Command Procedure
B.2	REMINDER.COM Command Procedure
B.3	DIR.COM Command Procedure
B.4	SYS.COM Command Procedure
B.5	GETPARMS.COM Command Procedure
B.6	EDITALL.COM Command Procedure
B.7	MAILEDIT.COM Command Procedure
B.8	FORTUSER.COM Command Procedure
B.9	LISTER.COM Command Procedure
B.10	CALC.COM Command Procedure
B.11	BATCH.COM Command Procedure
B.12	COMPILE_FILE.COM Command Procedure
Glossary
Glossary	Glossary
Index
Index
Examples
7-1	MIME$MAILCAP.DAT File
Figures
4-1	Directory Structure
7-1	Organizing Mail
7-2	Mail Utility Keypad
8-1	EVE Keys --- VT200, VT300, and VT400 Series Terminals
8-2	EVE Keys --- VT100 Series Terminals
9-1	List Sorted in Ascending Order
9-2	Record Fields in a List
9-3	Sorting by Key Field
9-4	Sorting with Default Key Records
9-5	Sorting with Multiple Key Fields
9-6	Sorting with Multiple Key Fields (Ascending and Descending Order)
9-7	Sorting with Identical Key Fields
9-8	Output from Using a Specification File
13-1	ON Command Actions
13-2	Flow of Execution Following Ctrl/Y Action
13-3	Ctrl/Y in Nested Procedures
16-1	Synchronizing Batch Job Execution
A-1	Differences Between DEC Multinational Character Set and ISO Latin-1 Character Set
Tables
2-1	To Enter DCL Commands
2-2	To Interrupt DCL Commands
2-3	To Recall Commands
2-4	To Control Cursor Position
2-5	To Control Screen Display
3-1	Commonly Associated Language Codes and Country Codes
5-1	Sample Wildcards and Matching Patterns
5-2	Directory Names on ODS-5 Volumes
5-3	Non-Supported OpenVMS Components
7-1	MIME Utility Optional Files
8-1	EVE Editing Keys That Move the Cursor
8-2	EVE Commands That Move the Cursor
8-3	EVE Editing Keys for Erasing and Restoring Text
8-4	EVE Commands for Erasing and Restoring Text
8-5	EVE Editing Keys That Move Text
8-6	EVE Commands That Move Text
8-7	EVE Commands for Box Editing
8-8	SET BOX SELECT Commands
8-9	EVE Commands for Locating Text in a Buffer
8-10	EDIT Command Line Qualifiers
8-11	EVE Commands for Buffer-Change Journaling and Recovery
8-12	Buffer-Change Journal File Names
8-13	EVE Editing Keys and Their Functions
8-14	EVE Text Formatting Commands and Their Functions
8-15	EVE Commands to Manipulate Buffers
8-16	Keys Used with EVE Windows
8-17	EVE Window Commands
9-1	High-Performance Sort/Merge: Differences in Behavior
9-2	/KEY Qualifier Values
11-1	Default Logical Name Tables
11-2	Default Logical Names in Process Logical Name Directory
11-3	Default Logical Names in Process Logical Name Table
11-4	Default Logical Names in System Logical Name Directory
11-5	Default Logical Names in System Logical Name Table
11-6	Default Protection of Shareable Logical Name Tables
11-7	Privilege or Access Type Required for Shareable Logical Name Tasks
12-1	String Comparisons
12-2	Numeric Comparisons
A-1	DEC Multinational Character Set
A-2	DCL Character Set

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