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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+.. (c) OPNFV, Spirent Communications and others
+
+****************************************
+OPNFV CIRV - Sofware Delivery Validation
+****************************************
+
+CIRV-SDV is an umbrella term used for collection of software validation tools. The term Software in SDV, refers to mainly two things:
+
+* Installer Manifests
+* Infrastructure Configuration
+
+CIRV-SDV aims to perfom the validation of the software configuration, against the design and requirements, that are preferably defined in a unified machine-readable format. Hence, the whole project relies heavily on an implementation of PDF 2.0 defined in CNTT.
+
+=======
+PDF 2.0
+=======
+
+The platform description is defined in CNTT RI-1 Chapter-6. CIRV-SDV includes a JSON-based implementation of this platform description. In *sdv/pdf/template*, user will find the template file, which can be used to customize for their environment. Alternatively, user can use a GUI tool in *sdv/pdf/site* folder.
+
+===============
+The Big Picture
+===============
+
+The below figure summarizes the applicability of CIRV-SDV, and it role in overall cloud deployment.
+
+.. image:: ./cirv-bigpicture.png
+  :width: 600
+
+=====================
+CIRV-SDV Architecture
+=====================
+
+The below figure provides architecture (containerized version) of CIRV-SDV. CIRV-SDV will also include non-containerized version in future.
+
+
+.. image:: ./cirv-archi.png
+  :width: 600
+
+======================
+CIRV-SDV Control Flow
+======================
+
+The below figure summarizes the control-flow among different components. From the below figure, user can see the importance of PDF.
+
+
+.. image:: ./cirv-cf.png
+  :width: 600