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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-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.
Required for code-set conversion
HCL Informix® products use the Code-Set Name-Mapping file to translate between code-set names and the more compact code-set numbers. You can use the registry file to find the hexadecimal values that correspond to code-set names or code-set numbers.

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-conversion source and object files
        Each code-set conversion file has two forms.
        Code-set-conversion file names
        To conform to DOS 8.3 naming conventions, GLS code-set-conversion files use a condensed form of the code-set names, code1code2, in their file names.
        Required for code-set conversion
        HCL Informix® products use the Code-Set Name-Mapping file to translate between code-set names and the more compact code-set numbers. You can use the registry file to find the hexadecimal values that correspond to code-set names or code-set numbers.
        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.

Required for code-set conversion

HCL Informix® products use the Code-Set Name-Mapping file to translate between code-set names and the more compact code-set numbers. You can use the registry file to find the hexadecimal values that correspond to code-set names or code-set numbers.

Most code-set conversion requires two code-set-conversion files. One file supports conversion of characters in code set A to their counterparts in code set B. Another supports the conversion in the return direction (from B to A). Such conversions are called two-way code-set conversions. For example, the code-set conversion between the CCSID 437 code set (hexadecimal 01b5 code number) and the CCSID 819 code set (or ISO8859-1 with a hexademical 0333 code number) requires the following two code-set-conversion files:

The 01b50333.cv file describes the mappings to use when HCL Informix® products convert characters in the CCSID 437 code set to those in the ISO8859-1 code set.
The 033301b5.cv file describes the mappings to use when HCL Informix® products convert characters in the ISO8859-1 code set to those in the CCSID 437 code set.

To be able to convert between these two code sets, the HCL Informix® product must be able to locate both these code-set-conversion object files. Performing the conversion on only one direction would result in mismatched characters. For more information about mismatched characters, see Perform code-set conversion.

The following table shows some of the code-set conversions that HCL Informix® products can support, along with their associated code-set-conversion source file names.


Source code set	Target code set	Code-set-conversion source file
ISO8859-1	Windows™ Code Page 1252	033304e4.cvo
Windows™ Code Page 1252	ISO8859-1	04e40333.cvo
ISO8859-1	Informix® CCSID 850	03330352.cvo
Informix® CCSID 850	ISO8859-1	03520333.cvo
Windows™ Code Page 1252	Informix® CCSID 850	04e40352.cvo
Informix® CCSID 850	Windows™ Code Page 1252	035204e4.cvo