Citation recall is a metric that measures the share of source documents used to produce a response that are actually cited in the response. High citation recall indicates that the response exposes more of the evidence base on which it relied.
A metric that answers the following question: What percentage of the source documents the LLM used to compose its response are actually cited in the response? For example, if an LLM relied on 20 documents to compose its response but the response only cited 11 of them, then the citation recall would be 0.55.