HP 3000 Manuals

Why NLS? [ MPE XL Native Language Programmer's Guide ] MPE/iX 5.0 Documentation


MPE XL Native Language Programmer's Guide

Why NLS? 

A well-written application program manipulates data and presents it
appropriately for its use.  Programs written with the intention of
providing a friendly user interface often make assumptions about the
local customs and language of the end user.  Program interface and
processing requirements vary from country to country, or possibly within
a country.  Most existing software does not take this into account and is
appropriate for use only in the country or locality in which it is
written.

The solution to this problem is to design application programs that can
be easily localized.  Localization is the adaptation of a software
application or system for use in different countries or local
environments.  The end user's native language, customs, and/or data
processing requirements may differ from those in the environment of the
software developer.  End users benefit from application programs which
interact with them in their native language and conform to their local
customs.  Native language refers to the user's first language (learned as
a child), such as Finnish, Portuguese, or Japanese.  Local customs refer
to conventions such as local date, time, and currency formats.
Traditionally, localization has been achieved by modifying a program for
each specific country.  Applications designed with localization in mind
provide a better solution.  Localization can then be accomplished with
(ideally) no modification of code at all.

An applications designer must write the application program with built-in
provisions for localization.  Functions that depend on local language or
custom cannot be hard-coded.  For example, all messages and prompts must
be stored in an external file or catalog.  Character comparisons and
upshifting must be accomplished by external system-level routines or
instructions.  The external files and catalogs can be translated, and the
program localized without rewriting or recompiling the application
program.

NLS provides the tools for an applications designer/programmer to produce
localized applications.  These tools may include architecture support,
peripheral support, and software facilities within the operating systems
and subsystems.  NLS addresses the internal functions of a program (for
example, sorting) and its user interface (for example, messages and
formats).



MPE/iX 5.0 Documentation