Contextual Compression Retriever

The Contextual Compression Retriever node improves uses the context from a query to improve responses from Vector Store similarity searches.

Before you begin

• Learn about the Langchain contextual compression retriever
• Learn about Langchain in Ensemble

Node reference

Parameter resolution in sub-nodes

Sub-nodes behave differently to other nodes when processing multiple items using an expression.

Most nodes, including root nodes, take any number of items as input, process these items, and output the results. You can use expressions to refer to input items, and the node resolves the expression for each item in turn. For example, given an input of five name values, the expression {{ $json.name }} resolves to each name in turn.

In sub-nodes, the expression always resolves to the first item. For example, given an input of five name values, the expression {{ $json.name }} always resolves to the first name.