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(has-ancestor-member? nd gilist)
Returns #t if nd has an ancestor whose GI is a member of gilist.
Norman Walsh, <norm@berkshire.net>
(define (has-ancestor-member? nd gilist) ;; Returns true if the specified node has one of a set of GIs as an ancestor (not (node-list-empty? (ancestor-member nd gilist))))
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Copyright © 1997, 1998 Norman Walsh