diff --git a/docs/identified_problems.md b/docs/identified_problems.md
index 36081e1..e1133a9 100644
--- a/docs/identified_problems.md
+++ b/docs/identified_problems.md
@@ -2,4 +2,11 @@
 
 - [ ] In most of the components from 'models/' we have a method to add  input and output to the model, however this linking of components is already done in oc-schedule when parsing the MxGraph. We need to determine if adding relations between components inside the objects themself is necessary.
     - When running in debug mode with a breakpoint inside the first line of computing.addLink it is only called once
-- [ ]
\ No newline at end of file
+- [ ]
+
+## MxGraph
+
+- [ ] The ConsumeMxGraphModel is way too long, it should refactored and broken down in different sub methods
+    - mxcell are put inside an <object> tag when the settings have been opened, wether values have been set or not. Maybe we could find a way to make mxgraph add these whenever we add a component to the graph.
+    - then identify the links only 
+- [ ] It is unclear what are the inputs and the ouputs. It seems like they were implemented to link two components, but it seems redundant with the identification of links
\ No newline at end of file
diff --git a/docs/lexicon.md b/docs/lexicon.md
new file mode 100644
index 0000000..a4e1259
--- /dev/null
+++ b/docs/lexicon.md
@@ -0,0 +1,6 @@
+- rType : ressource type, can only be :
+    - rtype.DATA
+    - rtype.COMPUTING
+    - rtype.STORAGE
+    - rtype.DATACENTER
+    - rtype.INVALID if it doesn't match with any of the previous type
\ No newline at end of file
diff --git a/models/workflow.go b/models/workflow.go
index 5a39887..b883a24 100644
--- a/models/workflow.go
+++ b/models/workflow.go
@@ -564,9 +564,9 @@ func FindSliceInSlice(slice1 []string, slice2 []string) (int, int, bool) {
 	return -1, -1, false
 }
 
-func (w Workspace) ConsumeMxGraphModel(xmlmodel MxGraphModel) (ret *Workflow, err error, issues []error) {
+func (w Workspace) ConsumeMxGraphModel(xmlmodel MxGraphModel) (returned_wf *Workflow, err error, issues []error) {
 
-	ret = &Workflow{}
+	returned_wf = &Workflow{}
 
 	// When we will iterate over the full array of cells, we first will register the resources
 	// and after the linkage between them
@@ -574,6 +574,18 @@ func (w Workspace) ConsumeMxGraphModel(xmlmodel MxGraphModel) (ret *Workflow, er
 		return xmlmodel.Root.MxCell[i].RID != nil
 	})
 
+	// For each cell of the xml graph,
+		// in the case cell has a rID retrieve its rType from the value of rID of the componant in the worfklow
+			// retrieve the componant's type
+			// create an object from the rType
+			// update the existing workflow with the new componant
+		// or by defautlt : the cell represents an arrow
+			// if the source or the target of the arrow is a datacenter
+				// define which end of the arrow is the DC
+				// if the other other end of the arrow is a computing component
+					// create a computing object
+					// attach the DC to it
+					// update the workflow with the object : create the list of this type of component or update the list with the id of the component with the object 
 	for _, cell := range xmlmodel.Root.MxCell {
 
 		switch {
@@ -595,10 +607,11 @@ func (w Workspace) ConsumeMxGraphModel(xmlmodel MxGraphModel) (ret *Workflow, er
 					nil
 			}
 
-			resObj := ret.CreateResourceObject(rType)
+			resObj := returned_wf.CreateResourceObject(rType)
 			resObj.setReference(rIDObj)
 
-			ret.UpdateObj(resObj, cell.ID)
+			returned_wf.UpdateObj(resObj, cell.ID)
+
 		case cell.ID == "0" || cell.ID == "1":
 			// ID 0 and 1 are special cases of mxeditor
 			continue
@@ -606,8 +619,8 @@ func (w Workspace) ConsumeMxGraphModel(xmlmodel MxGraphModel) (ret *Workflow, er
 
 		default:
 			// Not root nor resource. Should be only links
-			sourceObj := ret.GetResource(cell.Source)
-			targetObj := ret.GetResource(cell.Target)
+			sourceObj := returned_wf.GetResource(cell.Source)
+			targetObj := returned_wf.GetResource(cell.Target)
 
 			if sourceObj == nil || targetObj == nil {
 				if sourceObj == nil && targetObj == nil {
@@ -633,18 +646,18 @@ func (w Workspace) ConsumeMxGraphModel(xmlmodel MxGraphModel) (ret *Workflow, er
 					datacenterLinked = cell.Source
 				}
 
-				switch ret.GetResource(datacenterLinked).getRtype() {
+				switch returned_wf.GetResource(datacenterLinked).getRtype() {
 				case rtype.COMPUTING:
-					computingObj := ret.GetResource(datacenterLinked).(*ComputingObject)
+					computingObj := returned_wf.GetResource(datacenterLinked).(*ComputingObject)
 
 					// We should always get a ID because we already registered resources and discarded which doesn't correspond to existent models
 					computingObj.DataCenterID = *datacenter
-					ret.UpdateObj(computingObj, *datacenterLinked)
+					returned_wf.UpdateObj(computingObj, *datacenterLinked)
 				}
 
 			} else {
 				targetObj.addLink(INPUT, *cell.Source)
-				ret.UpdateObj(targetObj, *cell.Target) // save back
+				returned_wf.UpdateObj(targetObj, *cell.Target) // save back
 
 				// If we have a relationship of:
 				//     Source ----> Target
@@ -653,7 +666,7 @@ func (w Workspace) ConsumeMxGraphModel(xmlmodel MxGraphModel) (ret *Workflow, er
 				// But we also must make sure that the Target will be in the OUTPUTs of the Source
 
 				sourceObj.addLink(OUTPUT, *cell.Target)
-				ret.UpdateObj(sourceObj, *cell.Source)
+				returned_wf.UpdateObj(sourceObj, *cell.Source)
 			}
 
 		}
@@ -663,7 +676,9 @@ func (w Workspace) ConsumeMxGraphModel(xmlmodel MxGraphModel) (ret *Workflow, er
 	dataslist := make(map[string]bool)
 	// datalist := make(map[string]bool)
 
-	for _, comp := range ret.Computing {
+
+	// Test wether the computing componants are linked with a DC
+	for _, comp := range returned_wf.Computing {
 		if comp.DataCenterID == "" {
 			issues = append(issues, errors.New("Computing "+*comp.getName()+" without a Datacenter"))
 		} else {
@@ -673,14 +688,14 @@ func (w Workspace) ConsumeMxGraphModel(xmlmodel MxGraphModel) (ret *Workflow, er
 		}
 
 		for _, dcin := range comp.Inputs {
-			switch ret.GetResource(&dcin).getRtype() {
+			switch returned_wf.GetResource(&dcin).getRtype() {
 			case rtype.DATA:
 				dataslist[dcin] = true
 			}
 		}
 
 		for _, dcout := range comp.Outputs {
-			switch ret.GetResource(&dcout).getRtype() {
+			switch returned_wf.GetResource(&dcout).getRtype() {
 			case rtype.DATA:
 				dataslist[dcout] = true
 			}
@@ -688,23 +703,23 @@ func (w Workspace) ConsumeMxGraphModel(xmlmodel MxGraphModel) (ret *Workflow, er
 
 	}
 
-	for _, va := range ret.Storage {
-		if va.Inputs == nil && va.Outputs == nil {
-			issues = append(issues, errors.New("Storage "+*va.getName()+" without compatible inputs and outputs"))
+	for _, storage_component := range returned_wf.Storage {
+		if storage_component.Inputs == nil && storage_component.Outputs == nil {
+			issues = append(issues, errors.New("Storage "+*storage_component.getName()+" without compatible inputs and outputs"))
 		}
 	}
 
-	for dcID, va := range ret.Datacenter {
+	for dcID, dc_component := range returned_wf.Datacenter {
 		// if rID doesn't exist in the list, it means that it's not used
 		if _, ok := dcslist[dcID]; !ok {
-			issues = append(issues, errors.New("DC "+*va.getName()+" not atached to any Computing"))
+			issues = append(issues, errors.New("DC "+*dc_component.getName()+" not atached to any Computing"))
 		}
 	}
 
-	for dcID, va := range ret.Data {
+	for dcID, data_component := range returned_wf.Data {
 		// if rID doesn't exist in the list, it means that it's not used
 		if _, ok := dataslist[dcID]; !ok {
-			issues = append(issues, errors.New("Data "+*va.getName()+" not atached to any Computing"))
+			issues = append(issues, errors.New("Data "+*data_component.getName()+" not atached to any Computing"))
 		}
 	}
 
@@ -722,7 +737,7 @@ func (w Workspace) ConsumeMxGraphModel(xmlmodel MxGraphModel) (ret *Workflow, er
 	// inputs AND Comp2 inputs with Comp1 outputs, since we are
 	// iterating over all existent Computing models in the Graph
 
-	for _, comp := range ret.Computing {
+	for _, comp := range returned_wf.Computing {
 
 		compModel, err2 := comp.getModel()
 		if err = err2; err != nil {
@@ -744,7 +759,7 @@ func (w Workspace) ConsumeMxGraphModel(xmlmodel MxGraphModel) (ret *Workflow, er
 
 		//TODO: We should allow heterogenous inputs?
 		for _, objIn := range comp.Inputs {
-			resIn := ret.GetResource(&objIn)
+			resIn := returned_wf.GetResource(&objIn)
 			resInType := resIn.getRtype()
 			switch resInType {
 			case rtype.DATA:
@@ -781,7 +796,7 @@ func (w Workspace) ConsumeMxGraphModel(xmlmodel MxGraphModel) (ret *Workflow, er
 
 		//TODO: We should allow heterogenous outputs?
 		for _, objOut := range comp.Outputs {
-			resOut := ret.GetResource(&objOut)
+			resOut := returned_wf.GetResource(&objOut)
 			resOutType := resOut.getRtype()
 			switch resOutType {
 			case rtype.COMPUTING: