NET/MASTER Network Control Language (NCL) Programmer's Guide

Contents
106160 Tandem Computers Incorporated xv
User-Defined Maps 11-28
Why You Would Create a User-Defined Map 11-28
Creating a User-Defined Map 11-29
Using a User-Defined Map 11-35
Considerations for User-Defined Maps 11-40
Section 12 Working With Files
Enscribe File Structures and NCL 12-2
Enscribe File Structures Supported by NCL 12-2
Structured Enscribe Files 12-3
Edit Files 12-5
Guardian Processes 12-6
User Databases (UDBs) 12-6
Single UDBs 12-6
UDB Pairs 12-6
Creating a UDB 12-8
Creating a Single UDB 12-8
Creating the Files in a UDB Pair 12-8
Creating UDBs From NonStop NET/MASTER MS 12-9
Controlling Access to UDBs by NonStop NET/MASTER MS 12-10
Opening UDBs for Access by NonStop NET/MASTER MS 12-10
Dissociating UDBs From a UDB Identifier 12-15
Closing UDBs From Access by NonStop NET/MASTER MS 12-17
Displaying UDB Information 12-18
Displaying Physical Information About UDBs 12-18
Displaying Status Information About UDBs 12-19
Displaying Information About UDB Users 12-20
Controlling Access to a UDB or UDB Pair by NCL 12-21
System Variables Set by FILE Verbs 12-21
Return Codes in &SYS.FILE.RC 12-21
Handling Run-Time File Errors 12-21
Opening a UDB or UDB Pair for Access by NCL 12-22
Specifying the UDB Identifier 12-22
Specifying Different Local UDB Identifiers 12-24
Specifying Record Structure 12-29
Handling the Record Key 12-36
Record Structure and Record Keys 12-37