It is possible to set the base tosca type for an asset type in
catalog-be/sdc-backend/chef-repo/cookbooks/sdc-catalog-be/templates/default/BE-configuration.yaml.erb, default config is as follows:

genericAssetNodeTypes:
  VFC: org.openecomp.resource.abstract.nodes.VFC
  CVFC: org.openecomp.resource.abstract.nodes.VFC
  VF : org.openecomp.resource.abstract.nodes.VF
  CR : org.openecomp.resource.abstract.nodes.CR
  PNF: org.openecomp.resource.abstract.nodes.PNF
  Service: org.openecomp.resource.abstract.nodes.service

It would be useful to increase the granularity of this feature to enable the base type be set on a Category basis.
This would be useful for example where additional properties are wanted for a  particular service/resource category. An example would be the required properties for an ETSI SOL001 NSD
 
Where no configuration is provided on a category basis, the existing value set on the asset type will continue to apply