Hi there

more a akademic kind of question.

In a composite-id scenario - what is the difference to use

<key-many-to-one name="a" coloumn="A"/> in the composite-id block

verus having it in a own block

<many-to-one name="a" column="A"/> ?

is it just a "flavour" and the one is as good as the other ?

B

You can have it in its own block of you wish but you must have it set to insert="false" and update="false" since updates to the key properties need to occur through the key itself.

The key many-to-one in most cases results in more compact mapping document.