Hi Michael, On Wed, 2011-09-28 at 14:33 +1000, Michael Chapman wrote: > With Augeas's path expressions, is it possible to distinguish a node whose > value is an empty string from one that has no value? At the moment, nodes > with no value appear to be treated the same as those with an empty string:
Currently, there is no way to do that. When path expressions are evaluated, NULL's are automatically converted to the empty string to avoid funky tri-state logic. So far, nobody has needed that distinction, but it would be easy enough to add a null function to the language so that you could pick out nodes with null values, i.e. something like match test/*[null(.)] which, in your example, would match /test/b Would that be good enough for your purposes ? David _______________________________________________ augeas-devel mailing list augeas-devel@redhat.com https://www.redhat.com/mailman/listinfo/augeas-devel
