mORMot Open Source

Hi,

First of i ma utterly impressed with mORMot and your dedication to improve it.
I am in the same situation as many many delphier i falled into the trap of RAD with Delphi 1 and still cannot escape.
Found mORMot a week ago and started collect information about it here, reading the excellent doc (still need to digest it though, and grat for the other great product SynProject).
Right now i start evaluating  my possibilities because i started a new project.
It must be a cross platform enterprise product management system with windows ios android and web client requirement.
The product database must be partially schema-less so called EAV anti pattern schema. There is a Product Categories tree structure and every product belongs to one of those categories, and those categories define the product attributes which can be added dynamically after deployment. The user can search based on those categories and attributes.

The database will be most possibly PostgreSQL ( the second place win by MariaDB) based on the possibility to store those EAV attribures and ability to fast select based on them. MongoDB still on the list but i afraid the for the normal SQL like work it will be suboptimal.

I study mORMot and possibly RO Data Abstract to craft the middle tier Application server.

Some questions to mORMot that i cannot ansver based on docs (maybe totally my fault).

Is there any possibility to define global Bussiness rules based on data manipulation on the server side and scripting it with spidermonkey for the best elasticity? For example after CRUD operation on tables possibly cascade propagating the changes to other tables. Such events are possible in RO DA, how can i implement them in mORMot?
Client AND server side validation. How can i implement server controlled validation schemas deployed by server to the client to save bandwidth and improve the user experience?
How works the multi user concurrency and change conflict resolution? The is some exceptions on client side when conflicting changes occur?
I red some debates about supporting nextgen compilers. Is it still a problem? I need to support FM apps from XE7 to the upcoming new compilers for a several years from now.
How i can support livebindings in FM gui widgets. I would like to drop all together TDataSet and like components and work with collections? 

That is for now i have some other question mainly for database design of partial EAV schemas but i need first for myself clarify them

Thanks for your time and again gratz for that great product!

Sandor Dobi