+The supported descriptor included in the package is aligned to `ETSI NFV-SOL 001v2.5.1 <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>`_. The descriptor is partially mapped into the SDC AID model. There is also limited support for v2.7.1 and 3.3.1
+
+**ETSI SOL001 v2.5.1**
+
+If the package is onboarded using the ETSI SOL001 v2.5.1 model, the structure of the supported CSAR package
+is as described in `ETSI NFV-SOL 004v2.5.1`_ csar structure option 1 i.e. CSAR containing a TOSCA-Metadata directory.
+
+The supported descriptor included in the package is aligned to `ETSI NFV-SOL 001v2.5.1`_. The tosca types defined in this version of the ETSI NFV-SOL 001 are used in the created VF (rather than the types defined in the SDC AID model).
+
+Note in relation to model selection:
+
+- More than one model can be selected during onboarding. In the subsequent VSP import one model from the list of models selected at onboarding time must be selected.
+- For a package to be used in service design it must be imported with the same model as is selected during service creation.