Documentation on how to build and install Zorba can be found at the following web sites:

If you want to write your own Zorba application or use Zorba specific language features (e.g. eval or groupby), please refer to our following documentation and our API examples:

Release Links to the Documentation API examples
Zorba 1.0.0 Zorba’s Documentation
XQuery API Documentation
Zorba CXX API Documentation simple.cpp,
context.cpp,
serialization.cpp,
errors.cpp,
sax2.cpp,
external_functions.cpp
Zorba Python API Documentation python_test.py
Zorba Ruby API Documentation ruby_test.rb
Zorba PHP API Documentation php_test.php

You can find documentation of older releases at http://www.zorba-xquery.com/doc/.