I an adding entity references to an existing site with a lot of data, and I want to make sure I get it right first time. My question is - is it best practice to put an entity reference in the container content type, or in the contained content type? In other words, is it best practice for the entity reference to be in the album content type, or the track content type (also applies to team/team member, book/chapter or whatever)?
In an ideal world these relationships would be in both content types, but that doesn't seem to be built-in and the relevant module (Corresponding Entity Reference) seems to be in Alpha. So what is best-practice?