Ad hoc retrieval is the prototypical search engine task: searching a static set of documents with a previouslyunseen query. The ad hoc task was one of the first two tasks tackled in TREC and was run for eight years, representing hundreds of experiments. The wide range of experiments provide a rich store of ideas, many of which have become part of the accepted best practices for information retrieval.
The TREC Ad Hoc Experiments
TREC Chapter to be published in: TREC: Experiment and Evaluation in Information Retrieval, 2005,
information retrieval, TREC