Question about declare-top



In the mactex file, there exists the following statement:

(declare-top
 (special lop rop ccol $gcprint texport $labels $inchar
	  vaxima-main-dir
	  )
 (*expr tex-lbp tex-rbp))

What does it mean, from a coding standpoint, to declare these things
special or "*expr"?  I never quite understood this - I was under the
impression that this was something that appeared on a "per-file" basis,
but since most everything was in the "MAXIMA" package these statements
presumably have a global effect?  Any insight appreciated.

Cheers, and thanks
CY


		
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