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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+.. Copyright (C) 2019 IBM.
+
+Resource Assignment 
+===================
+.. toctree::
+   :maxdepth: 1
+   
+   
+Component executor:
+===================
+Workflow:
+=========
+
+A workflow defines an overall action to be taken for the service; it can be composed of a set of sub-actions to execute. Currently, workflows are backed by Directed Graph engine.
+
+A CBA can have as many workflow as needed.
+
+Template:
+=========
+
+A template is an artifact.
+
+A template is parameterized and each parameter must be defined in a corresponding mapping file.
+
+In order to know which mapping correlate to which template, the file name must start with an artifact-prefix, serving as identifier to the overall template + mapping.
+
+The requirement is as follow:
+
+${artifact-prefix}-template
+${artifact-prefix}-mapping
+
+A template can represent anything, such as device config, payload to interact with 3rd party systems, resource-accumulator template, etc...
+
+Mapping:
+========
+Defines the contract of each resource to be resolved. Each placeholder in the template must have a corresponding mapping definition.
+
+A mapping is comprised of:
+
+- name
+- required / optional
+- type (support complex type)
+- dictionary-name
+- dictionary-source
+
+Dependencies:
+=============
+
+This allows to make sure given resources get resolved prior the resolution of the resources defining the dependency.
+The dictionary fields reference to a specific data dictionary.
+
+Resource accumulator:
+=====================
+
+In order to resolve HEAT environment variables, resource accumulator templates are being in used for Dublin.
+
+These templates are specific to the pre-instantiation scenario, and relies on GR-API within SDNC.
+
+It is composed of the following sections:
+
+resource-accumulator-resolved-data: defines all the resources that can be resolved directly from the context. It expresses a direct mapping between the name of the resource and its value.
+
+capability-data: defines what capability to use to create a specific resource, along with the ingredients required to invoke the capability and the output mapping.
+
+- Scripts
+- Library
+- NetconfClient
+
+In order to facilitate NETCONF interaction within scripts, a python NetconfClient binded to our Kotlin implementation is made available. This NetconfClient can be used when using the netconf-component-executor.
+
+The client can be find here: https://github.com/onap/ccsdk-apps/blob/master/components/scripts/python/ccsdk_netconf/netconfclient.py
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