Data arrangement, storage and relationship based on other packages

Hi
The published archetypes and difinition of table arrangement in the form
of EAV model (like quary map and archetype profile) were so helpful among
openEHR documents.As a result we have no problem in understanding clinical
data storage and quarying in a dual model. However, it is difficult to
interprete the other packages. So, I have some questions about these
packages:
1- Are there any archetypes based on other packages, (not only EHR package,
eg. demographic and common packages)?
2- Are the data belonging to each package, stores in a different table
(other than clinical data table)?
3- How the relation between this separate packages is defined in database,
Is "quary map table" be the connection between them?

Best Regards