The ResourceIndex manages relationships between Fedora objects. It is very powerful, but the query syntax can be tricky.
The ResourceIndex's search system provides an interface that will translate queries from iTQL into URL form: RIsearch on Ryan's machine.
Sample RIsearch queries
Select objects, modification dates, and titles. Start with the 50th Fedora object, and get the next 25 objects:
Count all objects that are members of the collection object iudl:10: