QueryTypeMatch requests the indexer to match each expression term.

QueryTypePhrase searches for an exact phrase match.

ErrMissingLinkID is returned when attempting to index a document that does not specify a valid link ID.

ErrNotFound is returned by the indexer when attempting to look up a document that does not exist.

Document describes a web-oage whose content has been indexed by Links 'R' Us.

Query encapsulates a set of parameters to use when searching indexed documents.

Indexer is implemented by objects that can index and search documents discovered by the Links 'R' Us crawler.

Iterator is implemented by objects that can paginate search results.

QueryType describes the types of queries supported by the indexer implementations.