(This is not an interface: I simply omitted the method bodies)

class _ {
    protected $_data = array();

    function __construct($data);

    function set($name, $value);

    function get($name);

    function __set($name, $value);
    function __get($name); //aliases for their respective non-magic methods.

    # and some other generic methods
}

Essentially it's a class that provides a magical object-oriented reusable access layer to some data. I've considered DataLayer, DataObject and some others; I'd like to hear some suggestions from someone who's more terminologically savvy.