| Xapian::BM25Weight | BM25 weighting scheme |
| Xapian::BoolWeight | Boolean weighting scheme (everything gets 0) |
| Xapian::CategorySelectMatchSpy | MatchSpy for classifying matching documents by their values |
| Xapian::Database | This class is used to access a database, or a group of databases |
| Xapian::DateValueRangeProcessor | Handle a date range |
| Xapian::Document | A document in the database - holds data, values, terms, and postings |
| Xapian::Enquire | This class provides an interface to the information retrieval system for the purpose of searching |
| Xapian::ErrorHandler | Decide if a Xapian::Error exception should be ignored |
| Xapian::ESet | Class representing an ordered set of expand terms (an ESet) |
| Xapian::ESetIterator | Iterate through terms in the ESet |
| Xapian::ExpandDecider | Virtual base class for expand decider functor |
| Xapian::ExpandDeciderAnd | ExpandDecider subclass which rejects terms using two ExpandDeciders |
| Xapian::ExpandDeciderFilterTerms | ExpandDecider subclass which rejects terms in a specified list |
| Xapian::MatchDecider | Base class for matcher decision functor |
| Xapian::MSet | A match set (MSet) |
| Xapian::MSetIterator | An iterator pointing to items in an MSet |
| Xapian::MultipleMatchDecider | Class which applies several match deciders in turn |
| Xapian::MultiValueSorter | Sorter subclass which sorts by a several values |
| Xapian::NumberValueRangeProcessor | Handle a number range |
| Xapian::PositionIterator | An iterator pointing to items in a list of positions |
| Xapian::PostingIterator | An iterator pointing to items in a list of postings |
| Xapian::Query | Class representing a query |
| Xapian::QueryParser | Build a Xapian::Query object from a user query string |
| Xapian::RSet | A relevance set (R-Set) |
| Xapian::SimpleStopper | Simple implementation of Stopper class - this will suit most users |
| Xapian::Sorter | Virtual base class for sorter functor |
| Xapian::Stem | Class representing a stemming algorithm |
| Xapian::Stopper | Base class for stop-word decision functor |
| Xapian::StringAndFrequency | A string with a corresponding frequency |
| Xapian::StringListSerialiser | Class to serialise a list of strings in a form suitable for ValueCountMatchSpy |
| Xapian::StringListUnserialiser | Class to unserialise a list of strings serialised by a StringListSerialiser |
| Xapian::StringValueRangeProcessor | Handle a string range |
| Xapian::TermCountMatchSpy | Class for counting the frequencies of terms in the matching documents |
| Xapian::TermGenerator | Parses a piece of text and generate terms |
| Xapian::TermIterator | An iterator pointing to items in a list of terms |
| Xapian::TradWeight | Traditional probabilistic weighting scheme |
| Xapian::Utf8Iterator | An iterator which returns unicode character values from a UTF-8 encoded string |
| Xapian::ValueCountMatchSpy | Class for counting the frequencies of values in the matching documents |
| Xapian::ValueIterator | An iterator pointing to values associated with a document |
| Xapian::ValueRangeProcessor | Base class for value range processors |
| Xapian::Weight | Abstract base class for weighting schemes |
| Xapian::WritableDatabase | This class provides read/write access to a database |