diff --git a/docs/UML/diag_class_links.puml b/docs/UML/diag_class_links.puml
new file mode 100644
index 0000000..8942c85
--- /dev/null
+++ b/docs/UML/diag_class_links.puml
@@ -0,0 +1,47 @@
+@startuml class_links
+
+class LinkGraph {
+
+    + []Link links
+
+    + void AddLinkToGraph(Link link)
+    + boolean,str HasPrevious(Link)
+    + boolean,str HasNext(Link) 
+
+}
+
+class Link {
+    + str source
+    + str destination
+    + boolean DCLink
+
+    + *Link NewLink(interface{} src, interface{} dst)  
+    + void AddLinkToDataCenter()
+} 
+
+
+note left of LinkGraph::HasPrevious
+    checks if the component whose ID is in src is the dst of 
+    any other Link of the list on Link 
+end note 
+
+note top of Link 
+    Links need to be redefined in the sense that they are currently used
+    both : 
+    - to connect a component to a DC
+    - to represent the interractions between components 
+end note
+
+note right of Link::DCLink
+    set at construction of the object and used to order the links
+end note
+
+
+note left of Link::NewLink 
+    Must test if the parameters check the type constraints
+    and raise errors for the GUI if necessary 
+end note 
+
+LinkGraph*--"links"Link
+
+@enduml
\ No newline at end of file
diff --git a/models/links.go b/models/links.go
new file mode 100644
index 0000000..55bc8d9
--- /dev/null
+++ b/models/links.go
@@ -0,0 +1,26 @@
+package models
+
+import (
+	"fmt"
+	"reflect"
+)
+
+type Link struct {
+	source 			string
+	destination 	string
+	dcLink			bool
+}
+
+func NewLink(src interface{}, dst interface{}) (link Link) {
+	// Check type with reflect and get ID 
+	typeSrc := reflect.TypeOf(src)
+	typeDst := reflect.TypeOf(dst)
+
+	fmt.Println("src is %s\ndst is %s",typeSrc,typeDst)
+	return
+}
+
+func (l *Link) AddLinkToDataCenter(component interface{}) {
+	// if the component has a DataCenter id attribute then add it (switch on type)
+} 
+