{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,12]],"date-time":"2026-06-12T14:01:34Z","timestamp":1781272894296,"version":"3.54.1"},"reference-count":51,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2020,12,7]],"date-time":"2020-12-07T00:00:00Z","timestamp":1607299200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100007694","name":"Korea Agency for Infrastructure Technology Advancement","doi-asserted-by":"publisher","award":["18NSPS-B149388-01"],"award-info":[{"award-number":["18NSPS-B149388-01"]}],"id":[{"id":"10.13039\/501100007694","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Like what happened to the Internet of Things (IoT), smart cities have become abundant in our lives as well. One of the smart city definitions commonly used is that smart cities solve city problems to enhance citizens\u2019 life quality and make cities sustainable. From the perspective of information and communication technologies (ICT), we think this can be done by collecting and analyzing data to generate insights. The City Data Hub, which is a standard-based city data platform that has been developed, and a couple of problem-solving examples have been demonstrated. The key elements for smart city platforms have been chosen and they have been included in the core architecture principles and implemented as a platform. It has been proven that standard application programming interfaces (APIs) and common data models with data marketplaces, which are the keys, increase interoperability and guarantee ecosystem extensibility.<\/jats:p>","DOI":"10.3390\/s20237000","type":"journal-article","created":{"date-parts":[[2020,12,7]],"date-time":"2020-12-07T21:37:42Z","timestamp":1607377062000},"page":"7000","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":53,"title":["City Data Hub: Implementation of Standard-Based Smart City Data Platform for Interoperability"],"prefix":"10.3390","volume":"20","author":[{"given":"Seungmyeong","family":"Jeong","sequence":"first","affiliation":[{"name":"Autonomous IoT Research Center, Korea Electronics Technology Institute, Seongnam 13509, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seongyun","family":"Kim","sequence":"additional","affiliation":[{"name":"Autonomous IoT Research Center, Korea Electronics Technology Institute, Seongnam 13509, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6597-7988","authenticated-orcid":false,"given":"Jaeho","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Sejong University, Seoul 05006, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2020,12,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"3","DOI":"10.1080\/10630732.2014.942092","article-title":"Smart Cities: Definitions, Dimensions, Performance, and Initiatives","volume":"22","author":"Albino","year":"2015","journal-title":"J. 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