The Advent wreath is a circular garland of evergreen branches representing eternity. On that wreath, five candles are typically arranged. During the season of Advent, one candle on the wreath is lit each Sunday as a part of the Advent services.
Combined DNA Index System. The Combined DNA Index System (CODIS) is the United States national DNA database created and maintained by the Federal Bureau of Investigation.
The general structure of a relational database. A relational database management system (RDBMS) is a database management system (DBMS) that is based on the relational model as invented by E. F. Codd, of IBM's San Jose Research Laboratory.Many popular databases currently in use are based on the relational database model.he most popular definition of an RDBMS is a product that presents a view of data as a collection of rows and columns, even if it is not based strictly upon relational theory. By this definition, RDBMS products typically implement some but not all of Codd's 12 rules.