diff --git a/csaf/providermetaloader.go b/csaf/providermetaloader.go
index 490c9a7..4924aa0 100644
--- a/csaf/providermetaloader.go
+++ b/csaf/providermetaloader.go
@@ -23,6 +23,25 @@ type ProviderMetadataLoader struct {
 	logging func(string, ...any)
 }
 
+// ProviderMetadataLoadMessageType is the type of the message.
+type ProviderMetadataLoadMessageType int
+
+const (
+	//JSONDecodingFailed indicates problems with JSON decoding
+	JSONDecodingFailed ProviderMetadataLoadMessageType = iota
+	// SchemaValidationFailed indicates a general problem with schema validation.
+	SchemaValidationFailed
+	// SchemaValidationFailedDetail is a failure detail in schema validation.
+	SchemaValidationFailedDetail
+)
+
+// ProviderMetadataLoadMessage is a message generated while loading
+// a provider meta data file.
+type ProviderMetadataLoadMessage struct {
+	Type    ProviderMetadataLoadMessageType
+	Message string
+}
+
 // LoadedProviderMetadata represents a loaded provider metadata.
 type LoadedProviderMetadata struct {
 	// URL is location where the document was found.
@@ -32,7 +51,7 @@ type LoadedProviderMetadata struct {
 	// Hash is a SHA256 sum over the document.
 	Hash []byte
 	// Messages are the error message happened while loading.
-	Messages []string
+	Messages []ProviderMetadataLoadMessage
 }
 
 // Valid returns true if the loaded document is valid.
diff --git a/csaf/util.go b/csaf/util.go
index ecef653..0abe7c2 100644
--- a/csaf/util.go
+++ b/csaf/util.go
@@ -93,21 +93,31 @@ func loadProviderMetadataFromURL(
 
 	// We have loaded it the first time.
 	if err != nil {
-		result.Messages = []string{fmt.Sprintf("%s: Decoding JSON failed: %v", url, err)}
+		result.Messages = []ProviderMetadataLoadMessage{{
+			Type:    JSONDecodingFailed,
+			Message: fmt.Sprintf("%s: Decoding JSON failed: %v", url, err),
+		}}
 		storeLoaded()
 		return &result
 	}
 
 	switch errors, err := ValidateProviderMetadata(doc); {
 	case err != nil:
-		result.Messages = []string{
-			fmt.Sprintf("%s: Validating against JSON schema failed: %v", url, err)}
+		result.Messages = []ProviderMetadataLoadMessage{{
+			Type:    SchemaValidationFailed,
+			Message: fmt.Sprintf("%s: Validating against JSON schema failed: %v", url, err),
+		}}
 
 	case len(errors) > 0:
-		result.Messages = []string{
-			fmt.Sprintf("%s: Validating against JSON schema failed: %v", url, err)}
+		result.Messages = []ProviderMetadataLoadMessage{{
+			Type:    SchemaValidationFailed,
+			Message: fmt.Sprintf("%s: Validating against JSON schema failed: %v", url, err),
+		}}
 		for _, msg := range errors {
-			result.Messages = append(result.Messages, strings.ReplaceAll(msg, `%`, `%%`))
+			result.Messages = append(result.Messages, ProviderMetadataLoadMessage{
+				Type:    SchemaValidationFailedDetail,
+				Message: strings.ReplaceAll(msg, `%`, `%%`),
+			})
 		}
 	default:
 		// Only store in result if validation passed.
@@ -193,7 +203,7 @@ func LoadProviderMetadataForDomain(
 		}
 		alreadyLogged[result] = url
 		for _, msg := range result.Messages {
-			logging(msg)
+			logging(msg.Message)
 		}
 	}