specification/imports/Index.txt

@Target({ElementType.TYPE, ElementType.FIELD, ElementType.METHOD}) 
@Retention(RetentionPolicy.RUNTIME)
public @interface Index
{
    /** Name of the index
     * @return the name of the index
     */
    String name() default "";

    /** Table for the index. This is needed iff annotating a type where
     * the index is not defined on the primary table for the type.
     * @return the table on which the index is defined
     */
    String table() default "";

    /** Whether this index is unique
     * @return whether this index is unique
     */
    String unique() default "";

    /** Member (field and property) names that compose this index.
     * @return member names that compose this index
     */
    String[] members() default {};

    /** Columns that compose this index.
     * @return columns that compose this index
     */
    Column[] columns() default {};
}