ATL

-- @path UML=/UML/UML.ecore
-- @path Relational=/Relational/Relational.ecore
module Class2Relational;
create OUT : Relational from IN : UML;

-- Class to Table transformation
rule Class2Table {
    from
        c : UML!Class
    to
        t : Relational!Table (
            name <- c.name,
            col <- c.attributes->collect(e | thisModule.Attribute2Column(e))
        )
}

-- Attribute to Column transformation
lazy rule Attribute2Column {
    from
        a : UML!Attribute
    to
        c : Relational!Column (
            name <- a.name,
            type <- a.type.name
        )
}