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Client APIs and tools
You can use the HCL Informix® implementation of client APIs to develop applications for Informix database servers.
GLS User's Guide
The Informix® GLS User's Guide describes the Global Language Support (GLS) feature available in Informix products.
Appendix
This section contains additional reference information.
Manage GLS files
These topics describe the files provided for GLS, which are executable only.
Other GLS files
In addition to GLS locale files, HCL Informix® products might also use other GLS files.
Code-set files
A code-set file (also called a character-mapping or charmap file) defines a code set for subsequent use by locale and code-set-conversion files.

Client APIs and tools
You can use the HCL Informix® implementation of client APIs to develop applications for Informix database servers.
- Change Data Capture API Programmer's Guide
  The Informix® Change Data Capture API Programmer's Guide describes how to program applications to process changed data from HCL Informix databases using the Informix Change Data Capture API.
- Embedded SQLJ for HCL Informix®
  The Informix® Embedded SQLJ User's Guide contains information about using Informix Embedded SQLJ.
- ESQL/C Guide
  The Informix® ESQL/C Programmer's Manual explains how to use Informix ESQL/C, the Informix implementation of Embedded Structured Query Language (SQL) for C (ESQL/C), to create client applications with database-management capabilities.
- GLS User's Guide
  The Informix® GLS User's Guide describes the Global Language Support (GLS) feature available in Informix products.
  - GLS fundamentals
    The Global Language Support (GLS) feature lets Informix® products handle different languages, cultural conventions, and code sets for Asian, African, European, Latin American, and Middle Eastern countries.
  - GLS environment variables
    HCL Informix® products establish the client, database, and server locales with information from GLS-related environment variables and from data that is stored in the database.
  - SQL features
    These topics explain how the GLS feature affects the Informix® implementation of SQL.
  - Database server features
    These topics describe how the GLS feature affects the database server.
  - General SQL API features (ESQL/C)
    These topics explain how the GLS feature affects applications that you develop with the Informix® Client Software Development Kit.
  - Informix® ESQL/C features
    These topics explain how the GLS feature affects Informix® ESQL/C, an SQL application programming interface (API).
  - Appendix
    This section contains additional reference information.
    - Manage GLS files
      These topics describe the files provided for GLS, which are executable only.
      - Access GLS files
        HCL Informix® products access the GLS files to obtain locale-related information.
      - GLS locale files
        The locale file defines a GLS locale. It describes the basic language and cultural conventions that are relevant to the processing of data for a given language and territory.
      - Other GLS files
        In addition to GLS locale files, HCL Informix® products might also use other GLS files.
        Code-set-conversion files
        The code-set-conversion file describes how to map each character in a particular source code set to the characters of a particular target code set.
        Code-set files
        A code-set file (also called a character-mapping or charmap file) defines a code set for subsequent use by locale and code-set-conversion files.
        The HCL Informix® registry file (Windows™)
        The Code-Set Name-Mapping file, which is called registry, is an ASCII file that associates code-set names and aliases with their code-set numbers.
      - Remove unused files
        HCL Informix® products contain the GLS files.
      - The glfiles utility (UNIX™)
        To comply with MS-DOS 8.3 legacy format for file names, HCL Informix® products use condensed file names to store GLS locales and code-set-conversion files.
- API
  The Informix® GLS API Programmer's Guide describes the global language support (GLS) application programming interface (API) available in Informix ESQL/C and HCL Informix DataBlade® modules.
- Informix® Object Interface for C++ Guide
  The Informix® Object Interface for C++ Programmer's Guide describes how to develop HCL Informix client applications by using the object-oriented C++ programming language.
- Informix® ODBC Driver Guide
  The Informix® ODBC Driver Programmer's Manual serves as a user guide and reference for Informix ODBC Driver, which is the Informix implementation of the Microsoft™ Open Database Connectivity (ODBC) interface, Version 3.0.
- .NET provider options
  The Data Server Provider for .NET DB2® provider option is the preferred Informix® provider for developing new applications.
- Informix® JDBC Driver Guide
  The Informix® JDBC Driver Programmer's Guide describes how to install, load, and use Informix JDBC Driver to connect to the Informix database from within a Java™ application or applet.
- Informix International Language Supplement (ILS) User Guide
  These topics include information about the translated user interface files for Informix® UNIX™ products, locales, and code set conversion tables
- Informix® OLE DB Provider Guide
  The Informix® OLE DB Provider Programmer's Guide describes the software requirements for using Informix OLE DB Provider, show how to install and configure the provider for your use, and explain how to use Informix OLE DB Provider to enable client applications, such as ActiveX Data Object (ADO) applications and web pages, to access data on the Informix server.

Code-set files

A code-set file (also called a character-mapping or charmap file) defines a code set for subsequent use by locale and code-set-conversion files.

A GLS locale includes the appropriate code-set file for the code set that it supports. In addition, HCL Informix® products can perform code-set conversion between the code sets that have code-set files.

When the HCL Informix® product needs to obtain code-set information, it accesses one of the GLS code-set files in the following table.


Platform	Code-set file
UNIX™	$INFORMIXDIR/gls/cmZ/code.cmo
Windows™	%INFORMIXDIR%\gls\cmZ\code.cmo

In these paths, INFORMIXDIR is the environment variable that specifies the directory in which you install the HCL Informix® product, gls is the subdirectory that contains the GLS files, and Z represents the version number for the code-set object-file format.

Each code-set file has the following two forms:

The code-set source file is an ASCII file that describes the characters of a character set.
This file has a .cm extension and serves as documentation for the corresponding object file.
The code-set object file is a compiled form of the code-set information.
The object file is used to create locale object files. Object code-set files have a .cmo file extension.