{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,22]],"date-time":"2026-04-22T20:54:41Z","timestamp":1776891281387,"version":"3.51.2"},"reference-count":0,"publisher":"Centre pour la Communication Scientifique Directe (CCSD)","issue":"2","license":[{"start":{"date-parts":[[2000,3,1]],"date-time":"2000-03-01T00:00:00Z","timestamp":951868800000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Funct. Prog."],"published-print":{"date-parts":[[2000,3]]},"abstract":"<jats:p>\n                    A program derivation is said to be\n                    <jats:italic>polytypic<\/jats:italic>\n                    if some of its parameters are data types. Often \nthese data types are container types, whose elements store data. Polytypic program derivations \nnecessitate a general, non-inductive definition of \u2018container (data) type\u2019. Here we propose such \na definition: a container type is a relator that has membership. It is shown how this definition \nimplies various other properties that are shared by all container types. In particular, all \ncontainer types have a unique strength, and all natural transformations between container \ntypes are strong.\n                  <\/jats:p>","DOI":"10.1017\/s0956796899003640","type":"journal-article","created":{"date-parts":[[2002,7,27]],"date-time":"2002-07-27T09:26:15Z","timestamp":1027761975000},"page":"191-225","source":"Crossref","is-referenced-by-count":22,"title":["Container types categorically"],"prefix":"10.46298","volume":"10","author":[{"given":"PAUL","family":"HOOGENDIJK","sequence":"first","affiliation":[]},{"given":"OEGE","family":"DE MOOR","sequence":"additional","affiliation":[]}],"member":"25203","published-online":{"date-parts":[[2000,3,1]]},"container-title":["Journal of Functional Programming"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0956796899003640","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,22]],"date-time":"2026-04-22T20:18:33Z","timestamp":1776889113000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0956796899003640\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2000,3]]},"references-count":0,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2000,3]]}},"alternative-id":["S0956796899003640"],"URL":"https:\/\/doi.org\/10.1017\/s0956796899003640","relation":{},"ISSN":["0956-7968","1469-7653"],"issn-type":[{"value":"0956-7968","type":"print"},{"value":"1469-7653","type":"electronic"}],"subject":[],"published":{"date-parts":[[2000,3]]}}}