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- ETSI NFV SOL001 v2.5.1: https://docbox.etsi.org/ISG/NFV/Open/Publications_pdf/Specs-Reports/NFV-SOL%20001v2.5.1%20-%20GS%20-%20TOSCA-based%20NFV%20descriptors%20spec.pdf
- ETSI NFV SOL001 v2.5.1 NSD type definitions: https://forge.etsi.org/rep/nfv/SOL001/blob/master/etsi_nfv_sol001_nsd_2_5_1_types.yaml