There are two different Perl bindings. The original ones (Search::Xapian) are hand-coded XS and the newer ones (Xapian) are generated using SWIG. The big advantage of the SWIG-generated bindings is that wrapping is more automated, so newer API features are wrapped. They aim to provide compatibility with the XS bindings.

Documentation is available on-line for both:

• Perl Xapian module (newer SWIG-generated bindings)
• Perl Search::Xapian module (older hand-coded XS bindings)