Adding Ownerguid for boot certificate instance

Hi,
We have UefiSignatureOwner for secure boot database certificates

UefiSignatureOwner": {

"description": "The UEFI signature owner for this certificate.",

"longDescription": "The value of this property shall contain the GUID of the UEFI signature owner for this certificate as defined by the UEFI Specification. This property shall only be present for secure boot database certificates.",

"pattern": "([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12})",

"readonly": true,

"type": [

"string",

"null"

],

"versionAdded": "v1_2_0"

},

We have boot certificates in Computer system instance(/redfish/v1/Systems/{ComputerSystemId}/Boot/Certificates) and there is no attribute similar to UefiSignatureOwner
Can we add new attribute like OwnerGuid for boot certificates in upcoming schema?

Thanks,
Mani