DAT_ID (3) - Linux Manuals
DAT_ID: Makes an ID value from four letters. Allegro game programming library.
Command to display DAT_ID manual in Linux: $ man 3 DAT_ID
NAME
DAT_ID - Makes an ID value from four letters. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
Macro DAT_ID(a, b, c, d);
DESCRIPTION
Every object or property in a datafile is identified by a 4 letter ID,
which can be created with this macro. For example, to access the NAME
property of a datafile object, you could use:
get_datafile_property(datob, DAT_ID('N','A','M','E'));