LongEval 2025 CORE Retrieval Train Collection

This dataset serves as the official training data for the 2025 LongEval Information Retrieval Lab ( clef-longeval.github.io/ ), organized at CLEF . This collection consists of queries and documents extracted from the CORE scholarly literature search engine ( core.ac.uk/ ). The queries in this collection were issued by CORE users, and a specific pipeline was designed to capture user queries, their corresponding search results, and user interactions.

Using this pipeline, the dataset for this task was extracted, consisting of two main components: Search Information: unique, anonymous identifiers for individual user sessions, search queries, and the returned results. Click Information: unique, anonymous identifiers for individual user sessions, the links clicked within the results list, and the positions of the clicked links. The documents in the collection were selected based on the search results of user queries.