diff --git a/models/workflow/workflow.go b/models/workflow/workflow.go
index 98f5fdd..0eebd44 100644
--- a/models/workflow/workflow.go
+++ b/models/workflow/workflow.go
@@ -5,7 +5,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"os"
+	"mime/multipart"
 	"strings"
 	"time"
 
@@ -69,10 +69,11 @@ func (d *Workflow) GetResources(dt tools.DataType) []resources.ResourceInterface
 	return itf
 }
 
-func (d *Workflow) ExtractFromPlantUML(plantUML *os.File, request *tools.APIRequest) (*Workflow, error) {
+func (d *Workflow) ExtractFromPlantUML(plantUML multipart.File, request *tools.APIRequest) (*Workflow, error) {
 	if plantUML == nil {
 		return d, errors.New("no file available to export")
 	}
+
 	defer plantUML.Close()
 
 	d.Datas = []string{}
@@ -482,18 +483,18 @@ func (wf *Workflow) Planify(start time.Time, end *time.Time, request *tools.APIR
 	return longest, priceds, wf, nil
 }
 
-// Returns a map of DataType (processing,computing,data,storage,worfklow) where each resource (identified by its UUID) 
+// Returns a map of DataType (processing,computing,data,storage,worfklow) where each resource (identified by its UUID)
 // is mapped to the list of its items (different appearance) in the graph
 // ex: if the same Minio storage is represented by several nodes in the graph, in [tools.STORAGE_RESSOURCE] its UUID will be mapped to
-// the list of GraphItem ID that correspond to the ID of each node   
-func (w *Workflow) GetItemsByResources() (map[tools.DataType]map[string][]string) {
+// the list of GraphItem ID that correspond to the ID of each node
+func (w *Workflow) GetItemsByResources() map[tools.DataType]map[string][]string {
 	res := make(map[tools.DataType]map[string][]string)
 	dtMethodMap := map[tools.DataType]func() []graph.GraphItem{
-		tools.STORAGE_RESOURCE:  func() []graph.GraphItem { return w.GetGraphItems(w.Graph.IsStorage) },
-		tools.DATA_RESOURCE:     func() []graph.GraphItem { return w.GetGraphItems(w.Graph.IsData) },
-		tools.COMPUTE_RESOURCE:  func() []graph.GraphItem { return w.GetGraphItems(w.Graph.IsCompute) },
-		tools.PROCESSING_RESOURCE:  func() []graph.GraphItem { return w.GetGraphItems(w.Graph.IsProcessing) },
-		tools.WORKFLOW_RESOURCE: func() []graph.GraphItem { return w.GetGraphItems(w.Graph.IsWorkflow) },
+		tools.STORAGE_RESOURCE:    func() []graph.GraphItem { return w.GetGraphItems(w.Graph.IsStorage) },
+		tools.DATA_RESOURCE:       func() []graph.GraphItem { return w.GetGraphItems(w.Graph.IsData) },
+		tools.COMPUTE_RESOURCE:    func() []graph.GraphItem { return w.GetGraphItems(w.Graph.IsCompute) },
+		tools.PROCESSING_RESOURCE: func() []graph.GraphItem { return w.GetGraphItems(w.Graph.IsProcessing) },
+		tools.WORKFLOW_RESOURCE:   func() []graph.GraphItem { return w.GetGraphItems(w.Graph.IsWorkflow) },
 	}
 
 	for dt, meth := range dtMethodMap {
@@ -502,7 +503,7 @@ func (w *Workflow) GetItemsByResources() (map[tools.DataType]map[string][]string
 		for _, i := range items {
 			_, r := i.GetResource()
 			rId := r.GetID()
-			res[dt][rId] = append(res[dt][rId],i.ID)
+			res[dt][rId] = append(res[dt][rId], i.ID)
 		}
 	}