Part of lp.services.sitesearch
| Function | active_search_service | Undocumented |
| Interface | ISearchResult | An item that matches a search query. |
| Interface | ISearchResults | A collection of ISearchResult items that match a search query. |
| Class | SiteSearchResponseError | Raised when the search engine's response cannot be parsed. |
| Interface | ISearchService | A service that can return an ISearchResults for a query. |