Doctrine: 1 to many relationship with multiple foreign keys

[Kamikengen]

I am using Doctrine 1.2 and looking for the correct syntaxfor creating a 1:n relationship between two tables in my schema.ymlUsual this is done by:\[code\]BookChapter: columns: ... relations: Book: class: Book local: book_id foreign: id type: one onDelete: cascade\[/code\]However in my special case there are 2 foreign primary keys.\[code\]BookReaderbook: type: integer(8) primary: truereader: type: integer(8) primary: trueBookReaderDetailsbook_id: integer(8)reader_id: integer(8)...\[/code\]Is it possible to define such a relation with a doctrine schema file?