Added aliases to the grammar. An alias can appear in place of an attribute and uses the syntax `alias <var1> <var2>'. If var1 exists, var2 becomes an alias to it and vice versa. If neither var1 nor var2 exists or if they both exist, and error is reported and parsing stops.
Added aliases to the grammar. An alias can appear in place of an attribute
and uses the syntax `alias <var1> <var2>'. If var1 exists, var2 becomes an
alias to it and vice versa. If neither var1 nor var2 exists or if they both
exist, and error is reported and parsing stops.


OPENDAP/libdap4,OPENDAP/libdap,OPENDAP/libdap4,OPENDAP/libdap4,OPENDAP/libdap,OPENDAP/libdap4,OPENDAP/libdap4,OPENDAP/libdap,OPENDAP/libdap,OPENDAP/libdap4