{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,6,19]],"date-time":"2025-06-19T04:20:46Z","timestamp":1750306846167,"version":"3.41.0"},"publisher-location":"New York, NY, USA","reference-count":11,"publisher":"ACM","license":[{"start":{"date-parts":[[2013,6,28]],"date-time":"2013-06-28T00:00:00Z","timestamp":1372377600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.acm.org\/publications\/policies\/copyright_policy#Background"}],"content-domain":{"domain":["dl.acm.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2013,6,28]]},"DOI":"10.1145\/2516775.2516792","type":"proceedings-article","created":{"date-parts":[[2013,11,15]],"date-time":"2013-11-15T19:22:39Z","timestamp":1384543359000},"page":"247-254","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["Data PER model"],"prefix":"10.1145","author":[{"given":"Hristo","family":"Tujarov","sequence":"first","affiliation":[{"name":"University of Veliko Turnovo"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stefan","family":"Kalchev","sequence":"additional","affiliation":[{"name":"University of Veliko Turnovo"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vassil","family":"Milev","sequence":"additional","affiliation":[{"name":"University of Veliko Turnovo"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2013,6,28]]},"reference":[{"key":"e_1_3_2_1_1_1","unstructured":"Bordens K. B. Barrington Research design and methods: a process approach 2010 | ISBN-10: 0073532029  Bordens K. B. Barrington Research design and methods: a process approach 2010 | ISBN-10: 0073532029"},{"volume-title":"Trends in Conceptual Modeling: Citation Analysis of the ER Conference Papers (1979--2005)","year":"2007","author":"Chaomei C.","key":"e_1_3_2_1_2_1"},{"key":"e_1_3_2_1_3_1","unstructured":"CASE Tools http:\/\/www.umsl.edu\/~sauterv\/analysis\/F08papers\/View.html  CASE Tools http:\/\/www.umsl.edu\/~sauterv\/analysis\/F08papers\/View.html"},{"key":"e_1_3_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1145\/320434.320440"},{"key":"e_1_3_2_1_5_1","volume-title":"Intelligent Enterprise","volume":"1","author":"The Date C. J.","year":"1998"},{"key":"e_1_3_2_1_6_1","doi-asserted-by":"publisher","DOI":"10.1145\/320107.320109"},{"key":"e_1_3_2_1_7_1","doi-asserted-by":"crossref","unstructured":"Greefhorst D. E. Proper Architecture Principles: The Cornerstones of Enterprise Architecture (The Enterprise Engineering Series) 2011 | ISBN-10: 3642202780   Greefhorst D. E. Proper Architecture Principles: The Cornerstones of Enterprise Architecture (The Enterprise Engineering Series) 2011 | ISBN-10: 3642202780","DOI":"10.1007\/978-3-642-20279-7"},{"key":"e_1_3_2_1_8_1","first-page":"0","volume":"528","author":"Rishe N.","year":"1992","journal-title":"The Semantic Modeling Approach. McGraw-Hill"},{"key":"e_1_3_2_1_9_1","unstructured":"Peter P. Chen Entity-Relationship Modeling: Historical Events Future Trends and Lessons Learned http:\/\/www.csc.lsu.edu\/~chen\/pdf\/Chen_Pioneers.pdf  Peter P. Chen Entity-Relationship Modeling: Historical Events Future Trends and Lessons Learned http:\/\/www.csc.lsu.edu\/~chen\/pdf\/Chen_Pioneers.pdf"},{"key":"e_1_3_2_1_10_1","unstructured":"Roland K. L. Delcambre The Evolution of Conceptual Modeling Springer 2011 ISBN 978-3-642-17505-3  Roland K. L. Delcambre The Evolution of Conceptual Modeling Springer 2011 ISBN 978-3-642-17505-3"},{"key":"e_1_3_2_1_11_1","unstructured":"Virtual Exhibitions in Informatics The history of conceptual modeling http:\/\/cs-exhibitions.uni-klu.ac.at\/index.php?id=185  Virtual Exhibitions in Informatics The history of conceptual modeling http:\/\/cs-exhibitions.uni-klu.ac.at\/index.php?id=185"}],"event":{"name":"CompSysTech '13: Computer Systems and Technologies","sponsor":["TELECVB TELECOMS - Varna, Bulgaria","MEYS Bulgarian Ministry of Education, Youth and Science","ERSVB EURORISC SYSTEMS - Varna, Bulgaria","FOSEUB FEDERATION OF THE SCIENTIFIC ENGINEERING UNIONS - Bulgaria","UORB University of Ruse, Bulgaria","CASTUVTB CYRIL AND ST. METHODIUS UNIVERSITY of Veliko Tarnovo, Bulgaria","TECHUVB Technical University of Varna, Bulgaria","IEEEBSB IEEE Bulgaria Section, Bulgaria"],"location":"Ruse Bulgaria","acronym":"CompSysTech '13"},"container-title":["Proceedings of the 14th International Conference on Computer Systems and Technologies"],"original-title":[],"link":[{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/2516775.2516792","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/dl.acm.org\/doi\/pdf\/10.1145\/2516775.2516792","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,6,18]],"date-time":"2025-06-18T08:10:13Z","timestamp":1750234213000},"score":1,"resource":{"primary":{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/2516775.2516792"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2013,6,28]]},"references-count":11,"alternative-id":["10.1145\/2516775.2516792","10.1145\/2516775"],"URL":"https:\/\/doi.org\/10.1145\/2516775.2516792","relation":{},"subject":[],"published":{"date-parts":[[2013,6,28]]},"assertion":[{"value":"2013-06-28","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}