Re-enable NS primitives

Change-Id: I15c9a8de7ae8055696d7040df0cf4fa6532d699d

diff --git a/Release7/Re-enable_NS_primitives.md b/Release7/Re-enable_NS_primitives.md
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+# Re-enable NS primitives #
+
+## Proposer ##
+Adam Israel
+Gerardo Garcia
+
+## Type ##
+**Feature**
+
+## Target MDG/TF ##
+IM, LCM, N2VC, NBI, osmclient
+
+## Description ##
+With the new OSM internal architecture, support of NS primitives based on
+scripts, offered in the past by the SO, has disappeared. Enabling again NS
+primitives is required to allow day-1 and day-2 operations over NS.
+
+Due to the need to implement it from scratch, it is better to follow an approach
+for NS primitives similar to VNF so that the same procedures and code could
+be used. Moreover, similar constructs for VNF and NS primitives enable a
+natural path for nesting NS, where a NS can be considered as a VNF building
+block to construct other NS. In this regard, the IM changes for NS primitives
+(primitives, charms, relations) should be as similar as possible to the ones
+currently present in the VNFD and VNFR IM.
+
+## Demo or definition of done ##
+To be added.