What is greex?

The Greex framework enables you to define advanced XML conditions based on the Greex syntax. The Greex framework provides a declarative mechanism to use an input XML document in order to evaluate advanced XML conditions.

Some of the salient features of the Greex framework are:

It is XML aware.
It supports namespaces.
It contains a set of libraries.
It can return an XML element, a String, or Boolean value.