#
# Copyright World Wide Web Consortium, (Massachusetts Institute of
# Technology, European Research Consortium for Informatics and
# Mathematics, Keio University).
#
# All Rights Reserved.
#
# Please see the full Copyright clause at
# <http://www.w3.org/Consortium/Legal/copyright-software.html>
#
# Author: Dan Connolly
#
# Description: 
#
# If the pair <code>(x,y)</code> is an instance of <code>P</code>, than the pair <code>(y,x)</code> is
#   an instance of the named property.
#
eg:bob your:isBrotherOf eg:joe .