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+# ETSI NFV-SOL 006 v2.7.1 - YANG models for NFV descriptors
+
+This repository consists of YANG models for representing Network Functions Virtualisation (NFV)
+descriptors, fulfilling the requirements specified in ETSI GS NFV-IFA 011 and 
+ETSI GS NFV-IFA 014 applicable to a Virtualised Network Function Descriptor (VNFD), 
+a Physical Network Functions Descriptor (PNFD) and a Network Service Descriptor (NSD).
+
+The example-data folder consists of instance data files that serve as examples for the model. 
+
+A more detailed explanation of the models and the examples can be found in [ETSI GS NFV-SOL 006](https://portal.etsi.org/webapp/WorkProgram/Report_WorkItem.asp?WKI_ID=57489).
+
+## Repository organization
+
+Given the versioning conventions of ISG NFV, **only the first two digits** of the version are increased in subsequent releases (e.g. `2.6.1`, `2.7.1`, `2.8.1`, `3.1.1`, ...).
+
+In order to keep alignment between the versions of the repository and the versions of ETSI GS NFV-SOL 006, the following approach was agreed:
+
+* When a new revision `A.B.C` of SOL 006 is initiated a new branch `dev-vA.B.C` is created on top of the previously published branch;
+* The README gets modified in order to show the new target version and to indicate that the content is still in the drafting phase;
+* When the content is to be published, a new branch `vA.B.C` is created and the branch `dev-vA.B.C` is merged in it;
+* When the document is published the branch `vA.B.C` gets frozen and no more contributions are allowed. 
+
+## How to contribute
+
+ETSI Forge uses Gitlab to manage submissions to the repository. 
+Check the project page [here](https://forge.etsi.org/rep/nfv/SOL006) to submit contributions or to file requests and issues.
+
+For more information on setting up your environment and contributing, you may 
+refer to the [ETSI Forge wiki](https://forge.etsi.org/wiki/index.php/Main_Page).
+