olemus
ISO/IEC 2382:
toimingud, meetodid ja protseduurid
talletatud andmetest temaatilise informatsiooni saamiseks
= actions, methods, and procedures for obtaining information on a given subject from stored data

ülevaateid
https://en.wikipedia.org/wiki/Information_retrieval

https://www.cl.cam.ac.uk/teaching/1314/InfoRtrv/lecture1.pdf

http://openlib.org/home/krichel/courses/lis618/readings/rijsbergen79_infor_retriev.pdf

https://www.math.unipd.it/~aiolli/corsi/0910/IR/irbookprint.pdf

https://nlp.stanford.edu/IR-book/html/htmledition/irbook.html