Are two 'teams' stronger than one? This 'rotation' of judges means that Christina Aguilera and Cee Lo Green will return alongside Adam Levine and Blake Shelton for season 5 in the fall -- while Usher and Shakira will take season 6 in the spring of 2014.
A rule or rule set is a statement that tells browsers how to render particular elements on an HTML page. A rule set consists of a selector followed by a declaration block. The selector selects the elements on an HTML page that are affected by the rule set.
In addition to the database interface and the file interface, you can also use a description file to define a rule set. This is useful when you store the rule data in separate database tables or ASCII files. A rule set defined by a description file can only have one rule.