CareDB: A context and preference-aware location-based database system

Justin J. Levandoski, Mohamed F. Mokbel, Mohamed E. Khalefa

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


We demonstrate CareDB, a context and preference-aware database system. CareDB provides scalable personalized location-based services to users based on their preferences and current surrounding context. Unlike existing location-based database systems that answer queries based solely on proximity in distance, CareDB considers user preferences and various types of context in determining the answer to location-based queries. To this end, CareDB does not aim to define new location-based queries, instead, it aims to redefine the answer of existing location-based queries. To achieve its goals, CareDB has several distinguishing characteristics that revolve around a generic and extensible preference and context-aware query processing framework that addresses (a) scalable, efficient preference joins, (b) gracefully handling contextual attributes that are expensive to derive, and (c) support for uncertain attributes.

Original languageEnglish (US)
Pages (from-to)1529-1532
Number of pages4
JournalProceedings of the VLDB Endowment
Issue number2
StatePublished - Sep 2010


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