What is best practice for a scenario where you may have an object, that may have a different parent object depending on the form it is used in? For example, I have an object called parts. Parts can be called in my application to create a proposal (kind of sales order) of which I presently have 4 different types, they may also be used in invoicing, they may also be used in Jobs, where again parts may be used for maintenance purposes.

thanks in advance

Geoff Hirst