GoogleVertexAISearchRetriever

Filter expression.

If True return Extractive Answers, otherwise return Extractive Segments or Snippets.

The maximum number of documents to return.

The maximum number of extractive answers returned in each search result. At most 5 answers will be returned for each SearchResult.

The maximum number of extractive segments returned in each search result. Currently one segment will be returned for each SearchResult.

Specification to determine under which conditions query expansion should occur. 0 - Unspecified query expansion condition. In this case, server behavior defaults to disabled 1 - Disabled query expansion. Only the exact search query is used, even if SearchResponse.total_size is zero. 2 - Automatic query expansion built by the Search API.

Specification to determine under which conditions query expansion should occur. 0 - Unspecified spell correction mode. In this case, server behavior defaults to auto. 1 - Suggestion only. Search API will try to find a spell suggestion if there is any and put in the SearchResponse.corrected_query. The spell suggestion will not be used as the search query. 2 - Automatic spell correction built by the Search API. Search will be based on the corrected query if found.