I import vgw.csar, then upload to SDC, then download csar from SDC. we use tosca-parser to paser it, we get below warnnings and some data is deleted by tosca-parser. I found some filed required is false, but we don't fill it, we get some errors.  

$ unzip resource-VgwTstHhb67655-csar.csar

$ cd Definitions

$ tosca-parser --template-file resource-Vgw611529-template.yml 

The input "resource-Vgw611529-template.yml" failed validation with the following error(s): 
MissingRequiredFieldError: Data value of type "org.openecomp.datatypes.Naming" is missing required field "['supplemental_data']".

This is not SOL001 DM definition, I don't know why report error.

MissingRequiredParameterError: Template is missing required parameter for input "max_instances".

SOL001 DM don't define "max_instances", why SDC add it.

MissingRequiredParameterError: Template is missing required parameter for input "nf_type".

SOL001 DM don't define "nf_types", why SDC add it.

MissingRequiredParameterError: Template is missing required parameter for input "nf_naming_code".

SOL001 DM don't define "nf_naming_code", why SDC add it.

MissingRequiredParameterError: Template is missing required parameter for input "nf_role".

SOL001 DM don't define "nf_role", why SDC add it.

MissingRequiredParameterError: Template is missing required parameter for input "min_instances".

SOL001 DM don't define "min_instances", why SDC add it.

MissingRequiredParameterError: Template is missing required parameter for input "nf_function".

SOL001 DM don't define "nfinstances", why SDC add it.

MissingRequiredFieldError: "properties" of template "VL_cpe_public" is missing required field "['description', 'test_access']".

SOL001 DM define description required is false, this error is not right

InvalidTypeError: Type "tosca.nodes.nfv.Cp" is not a valid type.

SOL001 DM define tosca.nodes.nfv.Cp , why SDC delete it. this error cause below 3 errors

UnknownFieldError: "properties" of template "Cp_vgw_mux_gw_private_net" contains unknown field "layer_protocol". Refer to the definition to verify valid values.

UnknownFieldError: "properties" of template "Cp_vgw_mux_gw_private_net" contains unknown field "protocol_data". Refer to the definition to verify valid values.

UnknownFieldError: "properties" of template "Cp_vgw_mux_gw_private_net" contains unknown field "trunk_mode". Refer to the definition to verify valid values.

MissingRequiredFieldError: "properties" of template "Cp_vgw_mux_gw_private_net" is missing required field "['vnic_type', 'vnic_order', 'bitrate_requirement', 'vnic_name']".

SOL001 DM don't define "['vnic_type', 'vnic_order', 'bitrate_requirement', 'vnic_name']"

MissingRequiredFieldError: "properties" of template "VirtualStorage_root_all" is missing required field "['vdu_storage_requirements', 'rdma_enabled']".

This is because without tosca.nodes.nfv.Vdu.VirtualStorage

MissingRequiredFieldError: "properties" of template "VDU_vgw_0" is missing required field "['boot_order', 'inject_files', 'nfvi_constraints']".

SOL001 DM Vdu.compute "['boot_order', 'inject_files', 'nfvi_constraints']"  required is false

InvalidSchemaError: Schema definition of "vmBootUpTimeOut" has "required" attribute with invalid value "optional". The value must be one of "true, false".

MissingRequiredFieldError: Data value of type "tosca.datatypes.nfv.VduProfile" is missing required field "['vmBootUpTimeOut']".

Required must be one of "true, false", can't be optional

InvalidTypeError: Type "tosca.relationships.nfv.Vdu.AttachedTo" is not a valid type.

SOL001 DM definition including AttachesTo.

InvalidTypeError: Type "tosca.nodes.nfv.VDU.VirtualStorage" is not a valid type.

SOL001 DM define tosca.nodes.nfv.Vdu.VirtualStorage not define tosca.nodes.nfv.VDU.VirtualStorage.