10.16. Declaring a Metadata Attribute with Fact Types Example

This is an example of declaring metadata attributes for fact types and attributes. There are two metadata items declared for the fact type (@author and @dateOfCreation) and two more defined for the name attribute (@key and @maxLength). The @key metadata has no required value, and so the parentheses and the value were omitted:

import java.util.Date

declare Person
    @author( Bob )
    @dateOfCreation( 01-Feb-2009 )

    name : String @key @maxLength( 30 )
    dateOfBirth : Date 
    address : Address
end

import java.util.Date

declare Person
    @author( Bob )
    @dateOfCreation( 01-Feb-2009 )

    name : String @key @maxLength( 30 )
    dateOfBirth : Date 
    address : Address
end

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10.16. Declaring a Metadata Attribute with Fact Types Example

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