diff --git a/API/common/commonopenapi.yaml b/API/common/commonopenapi.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..10e43658cd974d6166499110521b942dcbc23785
--- /dev/null
+++ b/API/common/commonopenapi.yaml
@@ -0,0 +1,147 @@
+
+openapi: "3.0.0"
+
+# COMPONENTS ###############################################
+components:
+
+  #-------------------------------
+  # Reusable schemas (data models)
+  #-------------------------------
+  schemas:
+
+      Token:
+        type: string
+        example: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJodHRwczovL2V4YW1wbGUuYXV0aDAuY29tLyIsImF1ZCI6Imh0dHBzOi8vYXBpLmV4YW1wbGUuY29tL2NhbGFuZGFyL3YxLyIsInN1YiI6InVzcl8xMjMiLCJpYXQiOjE0NTg3ODU3OTYsImV4cCI6MTQ1ODg3MjE5Nn0.CA7eaHjIHz5NxeIJoFK9krqaeZrPLwmMmgI_XiQiIkQ
+        description: A string representing the token of the User.
+          
+      UnitSystem:
+        description: Unit of length.
+        type: string
+        enum: [MM,  CM,  DM,  M,  DAM,  HM,  KM,  INCH, FOOT, YARD, MILE]
+        example: M      
+
+      Transform3D:
+        description: Coordinate reference system of the world anchor, a 4*4 matrix (rowmajor) represented by a float vector.
+        type: array
+        minItems: 16
+        maxItems: 16
+        items:
+          type: number
+          format: float
+        example: [ 1, 0, 0, 3,
+                   0, 1, 0, 3,
+                   0, 0, 1, 3,
+                   0, 0, 0, 1 ]
+
+      Error:
+        required:
+          - code
+          - message
+        properties:
+          code:
+            type: integer
+            format: int32
+            example: 406
+          message:
+            type: string
+            example: "Error 406"
+
+      # From World Storage
+      EncodingInformationStructure:
+        description: An object holding the info of a Trackable`'`s encoding information `:` the data format and the version.
+        required:
+          - dataFormat
+          - version
+        properties:
+          dataFormat:
+            description: Identifier of the target framework.
+            type: string
+            enum: [HOLOLENS, ARKIT, ARCORE, VUFORIA, ARUCO, OTHER]
+            example : "HOLOLENS"
+          version:
+            description: The version of the format
+            type: string
+            example : "1.01"
+
+  #-------------------------------
+  # Reusable responses
+  #-------------------------------
+  responses:
+    #######################
+    # 1xx : Informational #
+    #######################
+    #################
+    # 2xx : Success #
+    #################
+
+    #####################
+    # 3xx : Redirection #
+    #####################
+
+    #######################
+    # 4xx : Client Errors #
+    #######################
+    400_BadRequest:
+      description: Bad/Invalid request.
+      content:
+        text/plain:
+          schema:
+            type: string
+            example: "Bad request"
+    
+    400_InvalidUUID:
+      description: Invalid UUID supplied.
+      content:
+        text/plain:
+          schema:
+            example: "The format of the UUID is incorrect"
+            type: string        
+
+    403_Forbidden:
+      description: Not allowed.
+      content:
+        text/plain:
+          schema:
+            type: string
+            example: "Not allowed"
+
+    404_NotFoundUUID:
+      description: Not found, could not find UUID in database.
+      content:
+        text/plain:
+          schema:
+            type: string
+            example: "Element not found"
+
+    405_NotSupported:
+      description: Not supported.
+      content:
+        text/plain:
+          schema:
+            type: string
+            example: "Not supported"   
+
+    409_NotEmptyUUID:
+      description: Invalid UUID, id must be a Nil value.
+      content:
+        text/plain:
+          schema:
+            type: string
+            example: "The element you sent has already a value and can't be sent to the world storage"     
+
+    4xx_UnexpectedError:      # Can be referenced as '#/components/responses/GenericError'
+      description: Unexpected error.
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/Error'
+
+    ########################
+    # 5xx : Server Errors  #
+    ########################
+    5xx_UnexpectedError:
+      description: Unexpected server error.
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/Error'
\ No newline at end of file
diff --git a/API/worldanalysis/worldanalysisopenapi.yaml b/API/worldanalysis/worldanalysisopenapi.yaml
index e7038181445d15d459b4eb9a848092973dfe2d23..e0d5bb08e070e0cc987b3ec8bfd46efc99bf6deb 100644
--- a/API/worldanalysis/worldanalysisopenapi.yaml
+++ b/API/worldanalysis/worldanalysisopenapi.yaml
@@ -68,7 +68,7 @@ paths:
       - in: header
         name: token
         schema:
-          $ref: '#/components/schemas/Token'
+          $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
       - in: header
         name: sessionID
         schema:
@@ -83,9 +83,9 @@ paths:
         '200':
           description: Successful operation.
         '405':
-          $ref: '#/components/responses/405_NotSupported'       
+          $ref: './../common/commonopenapi.yaml#/components/responses/405_NotSupported'       
         'default':
-          $ref: '#/components/responses/4xx_UnexpectedError'
+          $ref: './../common/commonopenapi.yaml#/components/responses/4xx_UnexpectedError'
           
   /pose/{trackableOrAnchorUUID}:
     get:
@@ -98,7 +98,7 @@ paths:
       - in: header
         name: token
         schema:
-          $ref: '#/components/schemas/Token'
+          $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
       - in: header
         name: sessionID
         schema:
@@ -125,15 +125,15 @@ paths:
               schema:
                 $ref: '#/components/schemas/Pose'
         '400':
-          $ref: '#/components/responses/400_BadRequest'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_BadRequest'
         '403':
-          $ref: '#/components/responses/403_Forbidden'
+          $ref: './../common/commonopenapi.yaml#/components/responses/403_Forbidden'
         '404':
-          $ref: '#/components/responses/404_NotFound'
+          $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'
         '405':
-          $ref: '#/components/responses/405_NotSupported'    
+          $ref: './../common/commonopenapi.yaml#/components/responses/405_NotSupported'    
         'default':
-          $ref: '#/components/responses/4xx_UnexpectedError'
+          $ref: './../common/commonopenapi.yaml#/components/responses/4xx_UnexpectedError'
 
   /poses:
     get:
@@ -146,7 +146,7 @@ paths:
       - in: header
         name: token
         schema:
-          $ref: '#/components/schemas/Token'
+          $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
       - in: header
         name: sessionID
         schema:
@@ -185,15 +185,15 @@ paths:
                     items:
                       $ref: '#/components/schemas/Pose'
         '400':
-          $ref: '#/components/responses/400_BadRequest'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_BadRequest'
         '403':
-          $ref: '#/components/responses/403_Forbidden'
+          $ref: './../common/commonopenapi.yaml#/components/responses/403_Forbidden'
         '404':
-          $ref: '#/components/responses/404_NotFound'
+          $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'
         '405':
-          $ref: '#/components/responses/405_NotSupported'    
+          $ref: './../common/commonopenapi.yaml#/components/responses/405_NotSupported'    
         'default':
-          $ref: '#/components/responses/4xx_UnexpectedError'
+          $ref: './../common/commonopenapi.yaml#/components/responses/4xx_UnexpectedError'
 
   /pose/subscriptions:
     post:
@@ -206,7 +206,7 @@ paths:
       - in: header
         name: token
         schema:
-          $ref: '#/components/schemas/Token'
+          $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
       - in: header
         name: sessionID
         schema:
@@ -239,15 +239,15 @@ paths:
                 - $ref: '#/components/schemas/SubscriptionSingle'
                 - $ref: '#/components/schemas/SubscriptionMultiple'
         '400':
-          $ref: '#/components/responses/400_BadRequest'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_BadRequest'
         '403':
-          $ref: '#/components/responses/403_Forbidden'
+          $ref: './../common/commonopenapi.yaml#/components/responses/403_Forbidden'
         '404':
-          $ref: '#/components/responses/404_NotFound'
+          $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'
         '405':
-          $ref: '#/components/responses/405_NotSupported'
+          $ref: './../common/commonopenapi.yaml#/components/responses/405_NotSupported'
         'default':
-          $ref: '#/components/responses/4xx_UnexpectedError'
+          $ref: './../common/commonopenapi.yaml#/components/responses/4xx_UnexpectedError'
 
 
   /pose/subscriptions/{subscriptionUUID}:
@@ -261,7 +261,7 @@ paths:
       - in: header
         name: token
         schema:
-          $ref: '#/components/schemas/Token'
+          $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
       - in: header
         name: sessionID
         schema:
@@ -282,9 +282,9 @@ paths:
               schema:
                 $ref: '#/components/schemas/SubscriptionSingle'
         '400':
-          $ref: '#/components/responses/400_BadRequest'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_BadRequest'
         '404':
-          $ref: '#/components/responses/404_NotFound'
+          $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'
     put:
       summary: Update a subscription
       operationId: updateSubscription
@@ -295,7 +295,7 @@ paths:
       - in: header
         name: token
         schema:
-          $ref: '#/components/schemas/Token'
+          $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
       - in: header
         name: sessionID
         schema:
@@ -335,9 +335,9 @@ paths:
               schema:
                 $ref: '#/components/schemas/SubscriptionSingle'
         '400':
-          $ref: '#/components/responses/400_BadRequest'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_BadRequest'
         '404':
-          $ref: '#/components/responses/404_NotFound'
+          $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'
     delete:
         summary: Remove a subscription to a given pose
         operationId: unsubscribeFromPose
@@ -348,7 +348,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
         - in: header
           name: sessionID
           schema:
@@ -370,9 +370,9 @@ paths:
                   type: string
                   example: "Subscription succesfuly deleted"
           '400':
-            $ref: '#/components/responses/400_BadRequest'
+            $ref: './../common/commonopenapi.yaml#/components/responses/400_BadRequest'
           '404':
-            $ref: '#/components/responses/404_NotFound'
+            $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'
 
   /capabilities:
     get:
@@ -385,7 +385,7 @@ paths:
       - in: header
         name: token
         schema:
-          $ref: '#/components/schemas/Token'
+          $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
       - in: header
         name: sessionID
         schema:
@@ -403,7 +403,7 @@ paths:
                     items: 
                       $ref: '#/components/schemas/Capability'
         'default':
-          $ref: '#/components/responses/4xx_UnexpectedError'
+          $ref: './../common/commonopenapi.yaml#/components/responses/4xx_UnexpectedError'
 
 
   /capabilities/{trackableOrAnchorUUID}:
@@ -417,7 +417,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
         - in: header
           name: sessionID
           schema:
@@ -442,15 +442,15 @@ paths:
                     capability:
                       $ref: '#/components/schemas/Capability'
           '400':
-            $ref: '#/components/responses/400_BadRequest'
+            $ref: './../common/commonopenapi.yaml#/components/responses/400_BadRequest'
           '403':
-            $ref: '#/components/responses/403_Forbidden'
+            $ref: './../common/commonopenapi.yaml#/components/responses/403_Forbidden'
           '404':
-            $ref: '#/components/responses/404_NotFound'
+            $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'
           '405':
-            $ref: '#/components/responses/405_NotSupported'
+            $ref: './../common/commonopenapi.yaml#/components/responses/405_NotSupported'
           'default':
-            $ref: '#/components/responses/4xx_UnexpectedError'
+            $ref: './../common/commonopenapi.yaml#/components/responses/4xx_UnexpectedError'
 
 # COMPONENTS ###############################################
 components:
@@ -459,12 +459,7 @@ components:
   # Reusable schemas (data models)
   #-------------------------------
   schemas:
-
-      Token:
-        type: string
-        example: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJodHRwczovL2V4YW1wbGUuYXV0aDAuY29tLyIsImF1ZCI6Imh0dHBzOi8vYXBpLmV4YW1wbGUuY29tL2NhbGFuZGFyL3YxLyIsInN1YiI6InVzcl8xMjMiLCJpYXQiOjE0NTg3ODU3OTYsImV4cCI6MTQ1ODg3MjE5Nn0.CA7eaHjIHz5NxeIJoFK9krqaeZrPLwmMmgI_XiQiIkQ
-        description: A string representing the token of the User.
-          
+ 
       SessionID:
         type: string
         example: 4JA1xVJSYKE47UM7RKDrfUcTXlJ0wxSQ
@@ -532,10 +527,10 @@ components:
         properties:    
           transform: 
             description : Pose data
-            $ref: '#/components/schemas/Transform3D'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Transform3D'
           unit:
             description: Unit system of the pose
-            $ref: '#/components/schemas/UnitSystem'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/UnitSystem'
 
       VectorQuaternionPoseValue:
         description: A pose value that is described with a position and a rotation
@@ -550,7 +545,7 @@ components:
             $ref: '#/components/schemas/Quaternion'  
           unit:
             description: Unit system of the pose
-            $ref: '#/components/schemas/UnitSystem'      
+            $ref: './../common/commonopenapi.yaml#/components/schemas/UnitSystem'      
 
       GeodeticPoseValue:
         description : A pose value in a geodetic coordinate system
@@ -579,25 +574,6 @@ components:
               enum: [EASTUPSOUTH, WESTUPNORTH]
               example: EASTUPSOUTH
 
-      UnitSystem:
-        description: Unit of length.
-        type: string
-        enum: [MM,  CM,  DM,  M,  DAM,  HM,  KM,  INCH, FOOT, YARD, MILE]
-        example: M      
-
-      Transform3D:
-        description: Coordinate reference system of the world anchor, a 4*4 matrix (rowmajor) represented by a float vector.
-        type: array
-        minItems: 16
-        maxItems: 16
-        items:
-          type: number
-          format: float
-        example: [ 1, 0, 0, 3,
-                   0, 1, 0, 3,
-                   0, 0, 1, 3,
-                   0, 0, 0, 1 ]
-
       Vector3:
         description: A 3 coordinates vector
         type: array
@@ -640,7 +616,7 @@ components:
             enum: [FIDUCIAL_MARKER, IMAGE_MARKER, MAP, GEOPOSE, OTHER]
             example: "FIDUCIAL_MARKER"
           encodingInformation:
-            $ref: '#/components/schemas/EncodingInformationStructure' 
+            $ref: './../common/commonopenapi.yaml#/components/schemas/EncodingInformationStructure' 
           framerate: 
             description: Number of frames per second the tracking of this type of trackable is performed by the World Analysis
             type: number
@@ -664,7 +640,7 @@ components:
             enum: [FIDUCIAL_MARKER, IMAGE_MARKER, MAP, GEOPOSE, OTHER]
             example: "FIDUCIAL_MARKER"
           encodingInformation:
-            $ref: '#/components/schemas/EncodingInformationStructure'   
+            $ref: './../common/commonopenapi.yaml#/components/schemas/EncodingInformationStructure'   
           framerate: 
             description: Number of frames per second the tracking expected for this type of trackable is performed by the World Analysis
             type: number
@@ -742,100 +718,3 @@ components:
             type: array
             items:
               $ref: '#/components/schemas/SubscriptionSingle'
-
-      Error:
-        required:
-          - code
-          - message
-        properties:
-          code:
-            type: integer
-            format: int32
-            example: 406
-          message:
-            type: string
-            example: "Error 406"
-
-      # From World Storage
-      EncodingInformationStructure:
-        description: An object holding the info of a Trackable`'`s encoding information `:` the data format and the version.
-        required:
-          - dataFormat
-          - version
-        properties:
-          dataFormat:
-            description: Identifier of the target framework.
-            type: string
-            enum: [HOLOLENS, ARKIT, ARCORE, VUFORIA, ARUCO, OTHER]
-            example : "HOLOLENS"
-          version:
-            description: The version of the format
-            type: string
-            example : "1.01"
-
-  #-------------------------------
-  # Reusable responses
-  #-------------------------------
-  responses:
-    #######################
-    # 1xx : Informational #
-    #######################
-    #################
-    # 2xx : Success #
-    #################
-
-    #####################
-    # 3xx : Redirection #
-    #####################
-
-    #######################
-    # 4xx : Client Errors #
-    #######################
-    400_BadRequest:
-      description: Bad/Invalid request.
-      content:
-        text/plain:
-          schema:
-            type: string
-            example: "Bad request"
-
-    403_Forbidden:
-      description: Not allowed.
-      content:
-        text/plain:
-          schema:
-            type: string
-            example: "Not allowed"
-
-    404_NotFound:
-      description: Not found.
-      content:
-        text/plain:
-          schema:
-            type: string
-            example: "Not found"
-
-    405_NotSupported:
-      description: Not supported.
-      content:
-        text/plain:
-          schema:
-            type: string
-            example: "Not supported"        
-
-    4xx_UnexpectedError:      # Can be referenced as '#/components/responses/GenericError'
-      description: Unexpected error.
-      content:
-        application/json:
-          schema:
-            $ref: '#/components/schemas/Error'
-
-    ########################
-    # 5xx : Server Errors  #
-    ########################
-    5xx_UnexpectedError:
-      description: Unexpected server error.
-      content:
-        application/json:
-          schema:
-            $ref: '#/components/schemas/Error'
diff --git a/API/worldstorage/worldstorageopenapi.yaml b/API/worldstorage/worldstorageopenapi.yaml
index 0aa5d46d623382aa179517c7bac8a2c6ca60a74a..3b8be33e53dcd016ac413965e8cca24abf18569a 100644
--- a/API/worldstorage/worldstorageopenapi.yaml
+++ b/API/worldstorage/worldstorageopenapi.yaml
@@ -91,7 +91,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
         - in: query
           name: uuids
           description: List of pairs consisting of UUIDs of requested World Anchors  or Trackables and a mode representing the context of the requested information
@@ -131,11 +131,11 @@ paths:
                     items: 
                       $ref: '#/components/schemas/RelocalizationInformation'
         '400':
-          $ref: '#/components/responses/400_InvalidUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_InvalidUUID'
         '404':
-          $ref: '#/components/responses/404_NotFoundUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'
         'default':
-          $ref: '#/components/responses/4xx_UnexpectedError'
+          $ref: './../common/commonopenapi.yaml#/components/responses/4xx_UnexpectedError'
 
 
 
@@ -157,7 +157,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
       requestBody:
           description: The Trackable to be added to the world storage.
           required: true
@@ -181,11 +181,11 @@ paths:
                 type: string
                 example: ""
         '400':
-          $ref: '#/components/responses/400_BadRequest'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_BadRequest'
         '409': 
-          $ref: '#/components/responses/409_NotEmptyUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/409_NotEmptyUUID'
         'default':
-          $ref: '#/components/responses/4xx_UnexpectedError'
+          $ref: './../common/commonopenapi.yaml#/components/responses/4xx_UnexpectedError'
     put:
       summary: Modify a Trackable.
       operationId: modifyTrackable
@@ -196,7 +196,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
       requestBody:
           description: The Trackable to be modified in the world storage.
           required: true
@@ -213,11 +213,11 @@ paths:
                 type: string
                 example: "777266da-e286-11ec-8fea-0242ac120002"
         '400':
-          $ref: '#/components/responses/400_BadRequest'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_BadRequest'
         '404': 
-          $ref: '#/components/responses/404_NotFoundUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'
         'default':
-          $ref: '#/components/responses/4xx_UnexpectedError'
+          $ref: './../common/commonopenapi.yaml#/components/responses/4xx_UnexpectedError'
     get:
       summary: Return all the Trackables.
       operationId: getTrackables
@@ -228,7 +228,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
       responses:
         '200':
           description: OK, return all the Trackables defined by the world storage.
@@ -246,7 +246,7 @@ paths:
                 type: string
                 example: ""
         default:
-          $ref: '#/components/responses/4xx_UnexpectedError'
+          $ref: './../common/commonopenapi.yaml#/components/responses/4xx_UnexpectedError'
 
   /trackables/{trackableUUID}:
     get:
@@ -259,7 +259,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
         - name: trackableUUID
           in: path
           description: UUID of the Trackable to retrieve.
@@ -275,9 +275,9 @@ paths:
               schema:
                 $ref: '#/components/schemas/Trackable' 
         '400':
-          $ref: '#/components/responses/400_InvalidUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_InvalidUUID'
         '404':
-          $ref: '#/components/responses/404_NotFoundUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'
     delete:
       summary: Delete a Trackable.
       operationId: deleteTrackable
@@ -288,7 +288,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
         - name: trackableUUID
           in: path
           description: Trackable UUID to delete.
@@ -305,9 +305,9 @@ paths:
                 type: string
                 example: "Element succesfully deleted"
         '400':
-          $ref: '#/components/responses/400_InvalidUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_InvalidUUID'
         '404':
-          $ref: '#/components/responses/404_NotFoundUUID'   
+          $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'   
 
 #################
 # WORLD ANCHORS #
@@ -323,7 +323,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
       requestBody:
           description: The World Anchor to be added to the world storage.
           required: true
@@ -347,11 +347,11 @@ paths:
                 type: string
                 example: ""
         '400':
-          $ref: '#/components/responses/400_BadRequest'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_BadRequest'
         '409': 
-          $ref: '#/components/responses/409_NotEmptyUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/409_NotEmptyUUID'
         'default':
-          $ref: '#/components/responses/4xx_UnexpectedError'
+          $ref: './../common/commonopenapi.yaml#/components/responses/4xx_UnexpectedError'
     put:
       summary: Modify a World Anchor.
       operationId: modifyWorldAnchor
@@ -362,7 +362,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
       requestBody:
           description: The World Anchor to be modified in the world storage.
           required: true
@@ -379,11 +379,11 @@ paths:
                 type: string
                 example: "777266da-e286-11ec-8fea-0242ac120002"
         '400':
-          $ref: '#/components/responses/400_BadRequest'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_BadRequest'
         '404': 
-          $ref: '#/components/responses/404_NotFoundUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'
         'default':
-          $ref: '#/components/responses/4xx_UnexpectedError'
+          $ref: './../common/commonopenapi.yaml#/components/responses/4xx_UnexpectedError'
     get:
       summary: Return all the World Anchors.
       operationId: getWorldAnchors
@@ -394,7 +394,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
       responses:
         '200':
           description: OK, return all the World Anchors defined by the world storage.
@@ -412,7 +412,7 @@ paths:
                 type: string
                 example: ""
         default:
-          $ref: '#/components/responses/4xx_UnexpectedError'
+          $ref: './../common/commonopenapi.yaml#/components/responses/4xx_UnexpectedError'
 
   /worldAnchors/{worldAnchorUUID}:
     get:
@@ -425,7 +425,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
         - name: worldAnchorUUID
           in: path
           description: UUID of the World Anchor to retrieve.
@@ -441,9 +441,9 @@ paths:
               schema:
                 $ref: '#/components/schemas/WorldAnchor' 
         '400':
-          $ref: '#/components/responses/400_InvalidUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_InvalidUUID'
         '404':
-          $ref: '#/components/responses/404_NotFoundUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'
     delete:
       summary: Delete a World Anchor.
       operationId: deleteWorldAnchor
@@ -454,7 +454,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
         - name: worldAnchorUUID
           in: path
           description: World Anchor UUID to delete.
@@ -471,9 +471,9 @@ paths:
                 type: string
                 example: "Element succesfuly deleted"
         '400':
-          $ref: '#/components/responses/400_InvalidUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_InvalidUUID'
         '404':
-          $ref: '#/components/responses/404_NotFoundUUID'   
+          $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'   
 
 ###############
 # WORLD LINKS #
@@ -489,7 +489,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
       requestBody:
           description: The link to be added to the world storage.
           required: true
@@ -513,11 +513,11 @@ paths:
                 type: string
                 example: ""
         '400':
-          $ref: '#/components/responses/400_BadRequest'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_BadRequest'
         '409': 
-          $ref: '#/components/responses/409_NotEmptyUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/409_NotEmptyUUID'
         'default':
-          $ref: '#/components/responses/4xx_UnexpectedError'
+          $ref: './../common/commonopenapi.yaml#/components/responses/4xx_UnexpectedError'
     put:
       summary: Modify a World Link.
       operationId: modifyWorldLink
@@ -528,7 +528,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
       requestBody:
           description: The World Link to be modified in the world storage.
           required: true
@@ -545,11 +545,11 @@ paths:
                 type: string
                 example: "777266da-e286-11ec-8fea-0242ac120002"
         '400':
-          $ref: '#/components/responses/400_BadRequest'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_BadRequest'
         '404': 
-          $ref: '#/components/responses/404_NotFoundUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'
         'default':
-          $ref: '#/components/responses/4xx_UnexpectedError'
+          $ref: './../common/commonopenapi.yaml#/components/responses/4xx_UnexpectedError'
     get:
       summary: Return all World Links.
       description: Get all the World Links currently being stored in the world storage.
@@ -560,7 +560,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
       responses:
         '200':
           description: OK return all the World Links defined by the world storage.
@@ -578,7 +578,7 @@ paths:
                 type: string
                 example: ""
         default:
-         $ref: '#/components/responses/4xx_UnexpectedError'
+         $ref: './../common/commonopenapi.yaml#/components/responses/4xx_UnexpectedError'
 
   /worldLinks/{worldLinkUUID}:
     get:
@@ -591,7 +591,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
         - name: worldLinkUUID
           in: path
           description: UUID of the World Link to retrieve.
@@ -607,9 +607,9 @@ paths:
               schema:
                 $ref: '#/components/schemas/WorldLink' 
         '400':
-          $ref: '#/components/responses/400_InvalidUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_InvalidUUID'
         '404':
-          $ref: '#/components/responses/404_NotFoundUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'
     delete:
       summary: Delete a World Link.
       operationId: deleteWorldLink
@@ -620,7 +620,7 @@ paths:
         - in: header
           name: token
           schema:
-            $ref: '#/components/schemas/Token'
+            $ref: './../common/commonopenapi.yaml#/components/schemas/Token'
         - name: worldLinkUUID
           in: path
           description: World Link id to delete.
@@ -637,9 +637,9 @@ paths:
                 type: string
                 example: "Element succesfully deleted"
         '400':
-          $ref: '#/components/responses/400_InvalidUUID'
+          $ref: './../common/commonopenapi.yaml#/components/responses/400_InvalidUUID'
         '404':
-         $ref: '#/components/responses/404_NotFoundUUID'
+         $ref: './../common/commonopenapi.yaml#/components/responses/404_NotFoundUUID'
  
 
 
@@ -670,7 +670,7 @@ components:
               trackable:
                 $ref : '#/components/schemas/Trackable'
               Transform3D:
-                $ref : '#/components/schemas/Transform3D'
+                $ref : './../common/commonopenapi.yaml#/components/schemas/Transform3D'
               mode:
                 description: Mode representing the context of the Relocalization information (AR device to WorldAnchor/Trackable or WorldAnchor/Trackable to AR device)
                 $ref: '#/components/schemas/Mode'
@@ -715,16 +715,16 @@ components:
           enum: [FIDUCIAL_MARKER, IMAGE_MARKER, MAP, GEOPOSE, OTHER]
           example: FIDUCIAL_MARKER
         trackableEncodingInformation:         
-          $ref: '#/components/schemas/EncodingInformationStructure'
+          $ref: './../common/commonopenapi.yaml#/components/schemas/EncodingInformationStructure'
         trackablePayload:
           description: The data provided to create the Trackable in a specific format handled by the world storage service.
           type: string
           format: byte
           example: "10110101"
         localCRS:
-          $ref: '#/components/schemas/Transform3D'
+          $ref: './../common/commonopenapi.yaml#/components/schemas/Transform3D'
         unit:
-          $ref: '#/components/schemas/UnitSystem'
+          $ref: './../common/commonopenapi.yaml#/components/schemas/UnitSystem'
         trackableSize:
           $ref: '#/components/schemas/Size'
         keyvalueTags:
@@ -760,9 +760,9 @@ components:
           format: uuid
           example: 6ddeb59e-7740-42f7-b329-1374b92e7fc2
         localCRS:
-          $ref: '#/components/schemas/Transform3D'
+          $ref: './../common/commonopenapi.yaml#/components/schemas/Transform3D'
         unit:
-          $ref: '#/components/schemas/UnitSystem'
+          $ref: './../common/commonopenapi.yaml#/components/schemas/UnitSystem'
         worldAnchorSize:
           $ref: '#/components/schemas/Size'
         keyvalueTags:
@@ -806,9 +806,9 @@ components:
         typeTo:
           $ref: '#/components/schemas/ObjectType'
         transform:
-          $ref: '#/components/schemas/Transform3D'
+          $ref: './../common/commonopenapi.yaml#/components/schemas/Transform3D'
         unit:
-          $ref: '#/components/schemas/UnitSystem'
+          $ref: './../common/commonopenapi.yaml#/components/schemas/UnitSystem'
         keyvalueTags:
           $ref: '#/components/schemas/KeyvalueTagList'
 
@@ -822,38 +822,8 @@ components:
           enum: [FIDUCIAL_MARKER, IMAGE_MARKER, MAP, GEOPOSE, OTHER]
           example: "FIDUCIAL_MARKER"
         encodingInformation:
-          $ref: '#/components/schemas/EncodingInformationStructure'
+          $ref: './../common/commonopenapi.yaml#/components/schemas/EncodingInformationStructure'
           
-            
-
-    EncodingInformationStructure:
-      description: An object holding the info of a Trackable`'`s encoding information `:` the data format and the version.
-      required:
-        - dataFormat
-        - version
-      properties:
-        dataFormat:
-          description: Identifier of the target framework.
-          type: string
-          enum: [HOLOLENS, ARKIT, ARCORE, VUFORIA, ARUCO, OTHER]
-          example : "HOLOLENS"
-        version:
-          description: The version of the format
-          type: string
-          example : "1.01"
-
-    Transform3D:
-        description: Coordinate reference system of the world anchor, a 4*4 matrix (rowmajor) represented by a float vector.
-        type: array
-        minItems: 16
-        maxItems: 16
-        items:
-          type: number
-          format: float
-        example: [ 1, 0, 0, 3,
-                   0, 1, 0, 3,
-                   0, 0, 1, 3,
-                   0, 0, 0, 1]
 
     ObjectType:
         description: Type of a world representaion object.
@@ -887,88 +857,3 @@ components:
             minItems: 1
         example: { "Place" : ["Building 123"], "Room" : ["007"]} 
 
-    Token:
-      type: string
-      example: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJodHRwczovL2V4YW1wbGUuYXV0aDAuY29tLyIsImF1ZCI6Imh0dHBzOi8vYXBpLmV4YW1wbGUuY29tL2NhbGFuZGFyL3YxLyIsInN1YiI6InVzcl8xMjMiLCJpYXQiOjE0NTg3ODU3OTYsImV4cCI6MTQ1ODg3MjE5Nn0.CA7eaHjIHz5NxeIJoFK9krqaeZrPLwmMmgI_XiQiIkQ
-      description: A string representing the token of the User.
-
-    Error:
-      required:
-        - code
-        - message
-      properties:
-        code:
-          type: integer
-          format: int32
-          example: 406
-        message:
-          type: string
-          example: "Error 406"
-          
-  #-------------------------------
-  # Reusable responses
-  #-------------------------------
-  responses:
-    #######################
-    # 1xx : Informational #
-    #######################
-
-    #################
-    # 2xx : Success #
-    #################
-
-    #####################
-    # 3xx : Redirection #
-    #####################
-
-    #######################
-    # 4xx : Client Errors #
-    #######################
-    400_BadRequest:
-      description: Bad request.
-      content:
-        text/plain:
-          schema:
-            type: string
-            example: "Bad request"
-
-    400_InvalidUUID:
-      description: Invalid UUID supplied.
-      content:
-        text/plain:
-          schema:
-            example: "The format of the UUID is incorrect"
-            type: string
-
-    404_NotFoundUUID:
-      description: Not found, could not find UUID in database.
-      content:
-        text/plain:
-          schema:
-            type: string
-            example: "Element not found"
-
-    409_NotEmptyUUID:
-      description: Invalid UUID, id must be a Nil value.
-      content:
-        text/plain:
-          schema:
-            type: string
-            example: "The element you sent has already a value and can't be sent to the world storage"
-
-    4xx_UnexpectedError:      # Can be referenced as '#/components/responses/GenericError'
-      description: Unexpected error.
-      content:
-        application/json:
-          schema:
-            $ref: '#/components/schemas/Error'
-
-    ########################
-    # 5xx : Server Errors  #
-    ########################
-    5xx_UnexpectedError:
-      description: Unexpected server error.
-      content:
-        application/json:
-          schema:
-            $ref: '#/components/schemas/Error'