# &tag;   html		nnnn                decimal value must start with 1-9
# &tag;   html		0ooo		    octal value must start with 0
# &tag;   html		xhhhh		    hexdecimal value must start with x
# &tag;	  html		"xxxx"		    string value must be quoted with "
#
# &tag;   matches to entity which includes ending ;
# &tag    matches to entity where there is no ; 
#
#         html  specifies that these entities are for html (other keywords not currently defined)
