[rules-users] Facts - One to Many

I am trying to figure out how to work with an existing model. The data is in MongoDB with embedded documents. It is about patients would have sub-documents. For example. An individual patient may have multiple allergies. Also a patient has multiple medications. So it is as follows: - Patient.medications ---> multiple Medication objects So I see where you have a simple one to one. Typically perhaps you might have the medication record know that it is associated with the patient, but that is not how it is currently organized. So the question is can I write rules when patients.medications returns a set/ collection of medications associated with the patient. I want to write a rule such as "if a patient is taking medication=xxx...." Thanks for your help. Ray Hooker