Updated: 11 December 1998

OpenVMS Guide to Extended File Specifications

Contents

Preface
Preface	Preface
Chapter 1
1	Overview of Extended File Specifications for OpenVMS
1.1	Benefits of Extended File Specifications
1.2	Features of Extended File Specifications
1.2.1	ODS-5 Volume Structure
1.2.1.1	Long File Names
1.2.1.2	More Characters Legal Within File Names
1.2.1.3	Preservation of Case
1.2.2	Deep Directory Structures
1.2.2.1	Directory Naming Syntax
1.3	Considerations Before Enabling ODS-5 Volumes
1.3.1	Considerations for System Management
1.3.2	Considerations for Users
1.3.2.1	Mixed-Version Support
1.3.2.2	Mixed-Architecture Support
1.3.3	Considerations for Applications
1.4	Recommendations for Using Extended File Specifications on OpenVMS Applications
Chapter 2
2	Managing Extended File Naming on OpenVMS Systems
2.1	Levels of Support for Extended File Specifications
2.1.1	Full Support
2.1.2	Default Support
2.1.3	No Support for Extended File Naming
2.1.4	No Support for ODS-5
2.2	Enabling Extended File Specifications on OpenVMS Alpha Systems
2.2.1	Using RMS Default Extended File Specifications Features
2.2.2	Enabling ODS-5 Volumes
2.2.2.1	Initializing a New ODS-5 Volume
2.2.2.2	Converting an Existing Volume to ODS-5
2.2.3	Converting from ODS-5 to ODS-2
2.3	Controlling Access to ODS-5 Volumes
2.3.1	Preventing VAX Users from Accessing an ODS-5 Volume
2.3.2	Preventing an Untested Application from Accessing an ODS-5 Volume
2.4	System Management Utility Changes
2.4.1	Analyze/Disk_Structure Utility
2.4.2	Backup Utility (Alpha Only)
2.4.3	Physical Backups of ODS-5 Volumes on VAX Systems
2.4.4	Mount Utility (Alpha Only)
Chapter 3
3	Extended File Naming Characteristics
3.1	File Specifications
3.1.1	Traditional (ODS-2) Syntax
3.1.2	Extended (ODS-5) Syntax
3.1.2.1	ISO Latin-1 Character Set
3.1.2.2	Special Characters
3.1.2.3	Interpretation of Period (.)
3.1.2.4	Expanded File Specification Length
3.1.2.5	Using Wildcards
3.1.2.5.1	Wildcard Characters
3.1.2.5.2	Wildcard Syntax
3.1.2.6	Case Preservation
3.2	Directory Specifications
3.2.1	Deep Directory Structures
3.2.2	Directory Naming Syntax
3.2.2.1	Directory ID and File ID Abbreviation
3.3	Working in Mixed Environments
3.4	DCL Support for ODS-5 Volumes
3.4.1	Using the Extended File Specifications Parsing Feature in DCL
3.4.1.1	Enabling the Extended File Name Parsing Style
3.4.1.2	Resetting the Default File Name Parsing Style
3.4.1.3	Switching Between File Name Parsing Styles
3.4.2	Using Extended File Names in DCL Command Parameters
3.4.3	Command Procedure File Specification
3.4.4	Case Preservation and $FILE
3.4.5	Ampersand Versus Apostrophe Substitution
3.5	DCL Commands and Utitlities
3.6	Displaying Files with Extended Names
3.6.1	DIRECTORY Command
3.6.2	TYPE Command
3.6.3	DELETE Command
3.6.4	PURGE Command
3.7	Displaying Extended File Names on a Terminal
Chapter 4
4	Extended File Naming Considerations for OpenVMS Applications Developers
4.1	Evaluating Your Current Support Status
4.1.1	Default Support
4.1.2	No Support for Extended File Names
4.1.3	No Support for ODS-5 Volumes
4.2	Upgrading an Application to Support Extended File Specifications
4.2.1	Upgrading to Default Support
4.2.1.1	Providing Support for ODS-5
4.2.1.2	Providing Support for Extended File Naming
4.2.2	Upgrading to Full Support
Appendix A
Appendix A	Setting Users' Expectations of Extended File Specifications
A.1	New Extended File Specifications Characteristics
A.2	ODS-2 and ODS-5 Used Together
A.3	Architecture-Related Notes
A.4	Restrictions

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