Hello gents, 

First of all I want to thank you for providing Qi4j – there are really some
unique ideas behind this project. 
I spent the last couple of days trying to figure out the key concepts, used
patterns & principles. 
To separate the state and the role-dependent behavior is from my point of
view really interesting and it matches 
with my experience I collected in the projects I was involved in.

Ok, what I still not yet really is the idea how to persist the states –
means how to persist the entities. 
Especially when considering the SQL Entity Storage. I tried the Postgresql
examples and realize that all the 
entities in the example code are persist to a table called
“schema.qi4j-entities”.

Our domain model includes about 100-120 key entities and it would be a
pleasure to model them in the Qi4j 
semantics. But the “materialized” schema – in our case the SQL schema must
reflect the model as we have e.g. 
reporting tools that expects to query an SQL database. I’m not sure if I
completely miss the point but I was 
somehow not able to figure the basic principle from the source code (also
due lack of time.. ). Maybe you guys 
are able to give me a brief intro about the basics (SQL) persistence
concepts.. 

Thank you in advance. 

jj  




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