diff --git a/pkg/model/types.go b/pkg/model/types.go
index 0930039c..099d4a90 100644
--- a/pkg/model/types.go
+++ b/pkg/model/types.go
@@ -11,29 +11,32 @@ type Model struct {
 }
 
 type Metadata struct {
-	Author          string            `json:"author,omitempty" yaml:"author,omitempty"`
-	Created         time.Time         `json:"created,omitempty" yaml:"created,omitempty"`
-	Description     string            `json:"description,omitempty" yaml:"description,omitempty"`
-	Tags            []string          `json:"tags,omitempty" yaml:"tags,omitempty"`
-	Labels          map[string]string `json:"labels,omitempty" yaml:"labels,omitempty"`
-	Format          string            `json:"format,omitempty" yaml:"format,omitempty"`
-	// GPUType is for TensorRT format only, it must be set when extract signature or serve 
+	Author      string            `json:"author,omitempty" yaml:"author,omitempty"`
+	Created     time.Time         `json:"created,omitempty" yaml:"created,omitempty"`
+	Description string            `json:"description,omitempty" yaml:"description,omitempty"`
+	Tags        []string          `json:"tags,omitempty" yaml:"tags,omitempty"`
+	Labels      map[string]string `json:"labels,omitempty" yaml:"labels,omitempty"`
+	Format      string            `json:"format,omitempty" yaml:"format,omitempty"`
+	// GPUType is for TensorRT format only, it must be set when extract signature or serve
 	// as a online service, otherwise， it can not extract or serve as a service.
 	// for other model format, you can set empty string or not set.
-	GPUType         string            `json:"gpuType,omitempty" yaml:"gpuType,omitempty"`
-	Framework       string            `json:"framework,omitempty" yaml:"framework,omitempty"`
-	Metrics         []Metric          `json:"metrics,omitempty" yaml:"metrics,omitempty"`
-	Hyperparameters []Hyperparameter  `json:"hyperparameters,omitempty" yaml:"hyperparameters,omitempty"`
-	Signature       Signature         `json:"signature,omitempty" yaml:"signature,omitempty"`
-	Training        Training          `json:"training,omitempty" yaml:"training,omitempty"`
-	Dataset         Dataset           `json:"dataset,omitempty" yaml:"dataset,omitempty"`
+	GPUType            string           `json:"gpuType,omitempty" yaml:"gpuType,omitempty"`
+	Framework          string           `json:"framework,omitempty" yaml:"framework,omitempty"`
+	Metrics            []Metric         `json:"metrics,omitempty" yaml:"metrics,omitempty"`
+	Hyperparameters    []Hyperparameter `json:"hyperparameters,omitempty" yaml:"hyperparameters,omitempty"`
+	Signature          *Signature       `json:"signature,omitempty" yaml:"signature,omitempty"`
+	Training           *Training        `json:"training,omitempty" yaml:"training,omitempty"`
+	Dataset            *Dataset         `json:"dataset,omitempty" yaml:"dataset,omitempty"`
+	DirectoryStructure []string         `json:"directoryStructure,omitempty" yaml:"directoryStructure,omitempty"`
 }
 
+// Metric is the type for training metric (e.g. acc).
 type Metric struct {
 	Name  string `json:"name"`
 	Value string `json:"value"`
 }
 
+// Hyperparameter is the type for training hyperparameter (e.g. learning rate).
 type Hyperparameter struct {
 	Name  string `json:"name"`
 	Value string `json:"value"`
diff --git a/pkg/saver/saver.go b/pkg/saver/saver.go
index 4f46ee05..1f8809e9 100644
--- a/pkg/saver/saver.go
+++ b/pkg/saver/saver.go
@@ -48,9 +48,13 @@ func (d Saver) Save(path string) (*model.Model, error) {
 
 	// Save the model from <path>/model.
 	buf := &bytes.Buffer{}
-	if err := Tar(filepath.Join(path, consts.ORMBModelDirectory), buf); err != nil {
+	directoryStructure, err := TarAndGetDirectoryStructure(
+		filepath.Join(path, consts.ORMBModelDirectory), buf)
+	if err != nil {
 		return nil, err
 	}
+	// Set directoryStructure for the model metadata.
+	metadata.DirectoryStructure = directoryStructure
 
 	m := &model.Model{
 		Metadata: metadata,
@@ -61,12 +65,14 @@ func (d Saver) Save(path string) (*model.Model, error) {
 	return m, nil
 }
 
-// Tar is copied from https://medium.com/@skdomino/taring-untaring-files-in-go-6b07cf56bc07.
-func Tar(src string, writers ...io.Writer) error {
+// TarAndGetDirectoryStructure is copied from https://medium.com/@skdomino/taring-untaring-files-in-go-6b07cf56bc07.
+func TarAndGetDirectoryStructure(
+	src string, writers ...io.Writer) ([]string, error) {
+	structure := make([]string, 0)
 
 	// ensure the src actually exists before trying to tar it
 	if _, err := os.Stat(src); err != nil {
-		return fmt.Errorf("Unable to tar files - %v", err.Error())
+		return nil, fmt.Errorf("Unable to tar files - %v", err.Error())
 	}
 
 	mw := io.MultiWriter(writers...)
@@ -78,7 +84,7 @@ func Tar(src string, writers ...io.Writer) error {
 	defer tw.Close()
 
 	// walk path
-	return filepath.Walk(src, func(file string, fi os.FileInfo, err error) error {
+	err := filepath.Walk(src, func(file string, fi os.FileInfo, err error) error {
 
 		// return on any error
 		if err != nil {
@@ -99,7 +105,11 @@ func Tar(src string, writers ...io.Writer) error {
 		parentDir := filepath.Dir(src)
 
 		// update the name to correctly reflect the desired destination when untaring
-		header.Name = strings.TrimPrefix(strings.Replace(file, parentDir, "", -1), string(filepath.Separator))
+		header.Name = strings.TrimPrefix(
+			strings.Replace(file, parentDir, "", -1), string(filepath.Separator))
+
+		// Add filename to the directory structure.
+		structure = append(structure, header.Name)
 
 		// write the header
 		if err := tw.WriteHeader(header); err != nil {
@@ -123,4 +133,6 @@ func Tar(src string, writers ...io.Writer) error {
 
 		return nil
 	})
+
+	return structure, err
 }