+Introduction
+------------
+The system is designed to be self service, which means that users, not just
+programmers, can reconfigure the software system as needed to meet customer
+requirements. To accomplish this goal, the system is built around models that
+provide for real-time changes in how the system operates. Users merely need
+to change a model to change how a service operates.
+Self service is a completely new way of delivering services. It removes the
+dependence on code releases and the delays they cause and puts the control of
+services into the hands of the service providers. They can change a model and
+its parameters and create a new service without writing a single line of code.
+This makes SERVICE PROVIDER(S) more responsive to its customers and able to
+deliver products that more closely match the needs of its customers.
+
+Modeling Concept
+----------------
+In Dublin release, the CDS community has contributed a framework to automate
+the resolution of resources for instantiation and any config provisioning
+operation, such as day0, day1 or day2 configuration.
+
+The content of the CBA Package is driven from a catalog of reusable data
+dictionary, component and workflow, delivering a reusable and simplified
+self service experience.
+
+TOSCA based JSON formatted model following standard:
+http://docs.oasis-open.org/tosca/TOSCA-Simple-Profile-YAML/v1.2/csd01/TOSCA-Simple-Profile-YAML-v1.2-csd01.html
+
+Most of the TOSCA modeled entity presented in the bellow documentation can
+be found here:
+https://github.com/onap/ccsdk-cds/tree/master/components/model-catalog/definition-type/starter-type
+
+Tosca Model Reference: