diff --git a/tools/sbom/sbom_data.py b/tools/sbom/sbom_data.py
index 0c380f6..d2ef48d 100644
--- a/tools/sbom/sbom_data.py
+++ b/tools/sbom/sbom_data.py
@@ -33,6 +33,9 @@
 PACKAGE_NAME_PRODUCT = 'PRODUCT'
 PACKAGE_NAME_PLATFORM = 'PLATFORM'
 
+VALUE_NOASSERTION = 'NOASSERTION'
+VALUE_NONE = 'NONE'
+
 
 class PackageExternalRefCategory:
   SECURITY = 'SECURITY'