org.eclipse.help.search
Interfaces 
IHelpSearchIndex
ISearchDocument
ISearchEngine
ISearchEngine2
ISearchEngineResult
ISearchEngineResult2
ISearchEngineResultCollector
ISearchIndex
ISearchScope
SearchParticipantXML.IParsedXMLContent
XMLSearchParticipant.IParsedXMLContent
Classes 
HelpIndexBuilder
LuceneSearchParticipant
SearchParticipant
SearchParticipantXML
XMLSearchParticipant