In Customer Service applications there are some data classes (PegaCA-Interface-xxx) like Account and Contact. These data types are not directly referencing each other. The link between them is being made by the PegaCA-Link-xxx class instances. For example PegaCA-Link-ContactAccount which maps the ContactID (key) from the Contact data type to Accountnumber (key) data type.
However within the OOTB solution (case types) i don't see any rule creating a new link- class instance when for example opening a new Account for a certain contact. In the implementation guide and elsewhere, i can't find any information about this either.
Can someone explain more about this and how/when this link- class instances needs to be created?