EquiX is a simple and powerful query language for XML, suitable for the 
naive user. The main goal in designing EquiX is to strike the
right balance between expressive power and simplicity.
EquiX has a form-based GUI that is constructed automatically from the DTD of 
XML documents. Query forms are built from well known HTML primitives. 
The result of a query in EquiX is a collection of XML pages, and it is
automatically generated from the query without explicit specification 
of the format of the result. 
Knowledge of XML syntax is not required in order to use EquiX. Yet, EquiX
is able to express rather complicated queries. For example, it can 
express join, some forms of negation, and aggregation.