Why is there no documentation of UVM config_db or resource_db in UVM cook book or user guides?

I have seen details in base class, other papers etc, but what document is supposed to be used as reference in terms of using the configuration data base ?

In reply to rmozhiku:

UVM Class Reference document discusses about uvm_resource_db and uvm_config_db both.

In reply to mayurkubavat:

But why is it not included in cook book or user guide? Is there any reason?

In reply to rmozhiku:

Cookbook article on Configuration
Cookbook article on config_db

In reply to rmozhiku:

UVM User document section

4.5.3 Choosing between uvm_resource_db and uvm_config_db