diff --git a/src/openapi/fiko/fiko-crud.yaml b/src/openapi/fiko/fiko-crud.yaml
index 3a01430..192c31c 100644
--- a/src/openapi/fiko/fiko-crud.yaml
+++ b/src/openapi/fiko/fiko-crud.yaml
@@ -581,17 +581,17 @@ paths:
             example: Dagkaart
           description: The description of the booking.
         - in: query
-          name: element1
+          name: department
           schema:
             type: string
             example: 900
-          description: The first element of the booking.
+          description: The department of the booking.
         - in: query
-          name: element2
+          name: costType
           schema:
             type: string
             example: 84956
-          description: The second element of the booking.
+          description: The cost type of the booking.
         - in: query
           name: documentCode
           schema:
@@ -799,11 +799,11 @@ paths:
             example: Dakaart - BUS
           description: The name of the booking line metadata.
         - in: query
-          name: incomingName
+          name: sourceMetadataId
           schema:
             type: string
-            example: Webshop
-          description: The incoming name of the booking line metadata.
+            example: 9b371ab4-2c47-4aa5-bcf8-6642385278ac
+          description: The source of the booking line metadata.
         - in: query
           name: identifyingFieldValue
           schema:
@@ -811,12 +811,12 @@ paths:
             example: 1737
           description: The identifying field value.
         - in: query
-          name: concessionName
+          name: concessionId
           schema:
             type: array
             items:
-              type: string
-            example: [BUS, RAIL]
+              type: integer
+            example: [1, 2]
           explode: false
           description: The name of the concession.
         - in: query
@@ -838,17 +838,17 @@ paths:
           explode: false
           description: The sense of the line.
         - in: query
-          name: element3
+          name: costCenter
           schema:
             type: string
             example: 603031
-          description: The element 3 of the booking line metadata.
+          description: The cost center of the booking line metadata.
         - in: query
-          name: element4
+          name: artcleName
           schema:
             type: string
             example: Dagkaart
-          description: The element 4 of the booking line metadata.      
+          description: The article name of the booking line metadata.      
         - in: query
           name: extRef1
           schema:
@@ -1067,12 +1067,6 @@ paths:
             type: string
             example: api.htm.nl/v2/account/12345/msgs/abc
           description: The rejection info of the source.
-        - in: query
-          name: validAt
-          schema:
-            type: string
-            example: 2024-01-01T00:00:00.000
-          description: Timestamp that the metadata is valid.
       responses:
         "200":
           description: OK
@@ -1220,12 +1214,12 @@ paths:
             example: 37a8095b-19db-498f-9349-5f37d21c5bdf
           description: The id of the concession metadata.
         - in: query
-          name: name
+          name: concessionId
           schema:
             type: array
             items:
-              type: string
-            example: [BUS, RAIL]
+              type: integer
+            example: [1, 2]
           explode: false
           description: The name of the concession.
         - in: query
@@ -1407,6 +1401,19 @@ paths:
             application/json:
               schema:
                 $ref: "#/components/schemas/MetadataAuditTrailsPostResponseBody"
+  /concessions:
+    get:
+      summary: Get all concessions.
+      description: Get all concessions.
+      tags:
+        - References v2
+      responses:
+        "200":
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/ConcessionsGetResponseBody"
 components:
   securitySchemes:
     bearerToken:
@@ -2048,10 +2055,10 @@ components:
               description:
                 type: string
                 example: Dagkaart
-              element1:
+              department:
                 type: string
                 example: 900
-              element2:
+              costType:
                 type: string
                 example: 84956
               documentCode:
@@ -2082,8 +2089,8 @@ components:
               - bookingMetadataId
               - bookingProcessId
               - description
-              - element1
-              - element2
+              - department
+              - costType
               - documentCode
               - hasSeparateTaxLine
               - hasLinePerIdentifyingField
@@ -2102,10 +2109,10 @@ components:
         description:
           type: string
           example: Dagkaart
-        element1:
+        department:
           type: string
           example: 900
-        element2:
+        costType:
           type: string
           example: 84956
         documentCode:
@@ -2134,8 +2141,8 @@ components:
           example: null
       required:
         - description
-        - element1
-        - element2
+        - department
+        - costType
         - documentCode
         - hasSeparateTaxLine
         - hasLinePerIdentifyingField
@@ -2158,11 +2165,11 @@ components:
           type: string
           nullable: true
           example: Dagkaart
-        element1:
+        department:
           type: string
           nullable: true
           example: 900
-        element2:
+        costType:
           type: string
           nullable: true
           example: 84956
@@ -2257,17 +2264,18 @@ components:
         name:
           type: string
           example: Dagkaart - BUS
-        incomingName:
+        sourceMetadataId:
           type: string
+          format: uuid
           example: null
           nullable: true
         identifyingFieldValue:
           type: string
           example: null
           nullable: true
-        concessionName:
-          type: string
-          example: RAIL
+        concessionId:
+          type: integer
+          example: 1
           nullable: true
         lineType:
           type: string
@@ -2282,11 +2290,11 @@ components:
             - debit
             - credit
           example: credit
-        element3:
+        costCenter:
           type: string
           example: 603031
           nullable: true
-        element4:
+        articleName:
           type: string
           example: dagkaart
           nullable: true
@@ -2346,20 +2354,16 @@ components:
               name:
                 type: string
                 example: Dagkaart - BUS
-              incomingName:
-                type: string
-                example: null
-                nullable: true
+              sourceMetadata:
+                type: object
+                $ref: '#/components/schemas/SourceMetadata'
               identifyingFieldValue:
                 type: string
                 example: null
                 nullable: true
-              concessionName:
-                type: string
-                enum:
-                  - RAIL
-                  - BUS
-                example: RAIL
+              concession:
+                type: object
+                $ref: '#/components/schemas/Concession'
               lineType:
                 type: string
                 enum:
@@ -2373,11 +2377,11 @@ components:
                   - debit
                   - credit
                 example: credit
-              element3:
+              costCenter:
                 type: string
                 example: 603031
                 nullable: true
-              element4:
+              articleName:
                 type: string
                 example: dagkaart
                 nullable: true
@@ -2424,21 +2428,19 @@ components:
           type: string
           nullable: true
           example: Dagkaart - BUS
-        incomingName:
+        sourceMetadataId:
           type: string
+          format: uuid
           nullable: true
           example: null
         identifyingFieldValue:
           type: string
           nullable: true
           example: null
-        concessionName:
-          type: string
+        concessionId:
+          type: integer
           nullable: true
-          enum:
-            - RAIL
-            - BUS
-          example: RAIL
+          example: 1
         lineType:
           type: string
           nullable: true
@@ -2454,11 +2456,11 @@ components:
             - debit
             - credit
           example: credit
-        element3:
+        costCenter:
           type: string
           nullable: true
           example: 603031
-        element4:
+        articleName:
           type: string
           nullable: true
           example: dagkaart
@@ -2759,15 +2761,6 @@ components:
         rejectionInfo:
           type: string
           example: api.htm.nl/v2/account/12345/msgs/abc
-        validFrom:
-          type: string
-          format: date-time
-          example: 2024-01-01T00:00:00.000
-        validUntil:
-          type: string
-          format: date-time
-          nullable: true
-          example: null
       required:
         - sourceMetadataId
         - incomingName
@@ -2776,7 +2769,6 @@ components:
         - businessOwner
         - rejectionProcessing
         - rejectionInfo
-        - validFrom
     SourceMetadataPostResponseBody:
       type: object
       properties:
@@ -2807,15 +2799,6 @@ components:
         rejectionInfo:
           type: string
           example: api.htm.nl/v2/account/12345/msgs/abc
-        validFrom:
-          type: string
-          format: date-time
-          example: 2024-01-01T00:00:00.000
-        validUntil:
-          type: string
-          format: date-time
-          nullable: true
-          example: null
     SourceMetadataPatchResponseBody:
       type: object
       properties:
@@ -2903,12 +2886,9 @@ components:
                 type: string
                 format: en
                 example: e0af8c8f-d421-4567-a14e-48e2a1bb86fb
-              name:
-                type: string
-                enum:
-                  - RAIL
-                  - BUS
-                example: RAIL
+              concession:
+                type: object
+                $ref: "#/components/schemas/Concession"
               percentage:
                 type: number
                 example: 84.021
@@ -2934,12 +2914,9 @@ components:
     ConcessionMetadataPostRequestBody:
       type: object
       properties:
-        name:
-          type: string
-          enum:
-            - RAIL
-            - BUS
-          example: RAIL
+        concessionId:
+          type: integer
+          example: 1
         percentage:
           type: number
           example: 84.021
@@ -2953,7 +2930,7 @@ components:
           nullable: true
           example: null
       required:
-        - name
+        - concessionId
         - percentage
         - validFrom
     ConcessionMetadataPostResponseBody:
@@ -2968,12 +2945,9 @@ components:
     ConcessionMetadataPatchRequestBody:
       type: object
       properties:
-        name:
-          type: string
-          enum:
-            - RAIL
-            - BUS
-          example: RAIL
+        concessionId:
+          type: integer
+          example: 1
         percentage:
           type: number
           example: 84.021
@@ -2995,6 +2969,30 @@ components:
           example: e0af8c8f-d421-4567-a14e-48e2a1bb86fb
       required:
         - concessionMetadataId
+    ConcessionsGetResponseBody:
+      type: object
+      properties:
+        concessions:
+          type: array
+          items:
+            $ref: '#/components/schemas/Concession'
+        href:
+          type: string
+          nullable: true
+          description: URI for pagination.
+          example: null
+    Concession:
+      type: object
+      properties:
+        concessionId:
+          type: integer
+          example: 1
+        name:
+          type: string
+          example: BUS
+      required:
+        - concessionId
+        - name
     SourceMetadata:
       type: object
       properties:
@@ -3020,15 +3018,6 @@ components:
         rejectionInfo:
           type: string
           example: api.htm.nl/v2/account/12345/msgs/abc
-        validFrom:
-          type: string
-          format: date-time
-          example: 2024-01-01T00:00:00.000
-        validUntil:
-          type: string
-          format: date-time
-          nullable: true
-          example: null
       required:
         - sourceMetadataId
         - incomingName