[Tacker] [Mistral] Regarding Inputs in Network Service Descriptors

Hi, I have been trying to create a Network Service Descriptor which takes flavor, image, network_name as inputs from a parameter file and then passes it on to the VNF Descriptor but so far my attempts have been unsuccessful. Is there a standard template available because I could not find even a single one which took image_name or flavor_name from a parameter file.

Thank you. Regards, Nehal Bansal