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NAME
       nl_types.h - data types


SYNOPSIS
       #include <nl_types.h>


DESCRIPTION
       The <nl_types.h> header shall contain definitions of at least the following types:

       nl_catd
              Used  by  the message catalog functions catopen(), catgets(), and catclose() to identify a catalog
              descriptor.

       nl_item
              Used by nl_langinfo() to identify items of langinfo data.  Values of objects of type  nl_item  are
              defined in <langinfo.h> .

       The <nl_types.h> header shall contain definitions of at least the following constants:

       NL_SETD
              Used  by  gencat  when  no  $set  directive  is  specified  in a message text source file; see the
              Internationalization Guide. This constant can be passed as the value of set_id on subsequent calls
              to catgets() (that is, to retrieve messages from the default message set). The value of NL_SETD is
              implementation-defined.

       NL_CAT_LOCALE
              Value that must be passed as the oflag argument  to  catopen()  to  ensure  that  message  catalog
              selection depends on the LC_MESSAGES locale category, rather than directly on the LANG environment
              variable.

       The following shall be declared as functions and may also be defined as macros. Function prototypes shall
       be provided.

              int       catclose(nl_catd);
              char     *catgets(nl_catd, int, int, const char *);
              nl_catd   catopen(const char *, int);

       The following sections are informative.


APPLICATION USAGE
       None.


RATIONALE
       None.


FUTURE DIRECTIONS
       None.


SEE ALSO
       <langinfo.h>  ,  the  System Interfaces volume of IEEE Std 1003.1-2001, catclose(), catgets(), catopen(),
       nl_langinfo(), the Shell and Utilities volume of IEEE Std 1003.1-2001, gencat


       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition,
       Standard  for  Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers,
       Inc  and  The  Open Group. In the event of any discrepancy between this version and the original IEEE and
       The Open Group Standard, the original IEEE and The Open Group  Standard  is  the  referee  document.  The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .