opensolaris man page for global

global(1T)						       Tcl Built-In Commands							global(1T)

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NAME
       global - Access global variables

SYNOPSIS
       global varname ?varname ...?
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DESCRIPTION
       This command has no effect unless executed in the context of a proc body.  If the global command is executed in the context of a proc body,
       it creates local variables linked to the corresponding global variables (and therefore these variables are listed by info locals).

       If varname contains namespace qualifiers, the local variable's name is the unqualified name of the global variable, as  determined  by  the
       namespace tail command.

EXAMPLES
       This procedure sets the namespace variable ::a::x
	      proc reset {} {
		  global a::x
		  set x 0
	      }

       This  procedure	accumulates the strings passed to it in a global buffer, separated by newlines.  It is useful for situations when you want
       to build a message piece-by-piece (as if with puts) but send that full message in a single piece (e.g. over a connection opened with socket
       or as part of a counted HTTP response).
	      proc accum {string} {
		  global accumulator
		  append accumulator $string 

	      }

SEE ALSO
       namespace(1T), upvar(1T), variable(1T)

KEYWORDS
       global, namespace, procedure, variable

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +--------------------+-----------------+
       |  ATTRIBUTE TYPE    | ATTRIBUTE VALUE |
       +--------------------+-----------------+
       |Availability	    | SUNWTcl	      |
       +--------------------+-----------------+
       |Interface Stability | Uncommitted     |
       +--------------------+-----------------+
NOTES
       Source for Tcl is available on http://opensolaris.org.

Tcl																	global(1T)