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1 data model
"A collection of related object types, operators, and integrity rules that form the abstract entity supported by a database management system (DBMS). Thus, one speaks of a relational DBMS, a network DBMS, and so on, depending on the type of data model a DBMS supports. In general, a DBMS supports only one data model as a practical rather than a theoretical restriction." -
2 Domain Name System
"A hierarchical, distributed database that contains mappings of DNS domain names to various types of data, such as IP addresses. DNS enables the location of computers and services by user-friendly names, and it also enables the discovery of other information stored in the database." -
3 geographic
Pertaining to data types in an ellipsoidal coordinate system. -
4 geometric
Pertaining to data types in a planar coordinate system.
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