openapi: 3.1.0
info:
  title: SAP Sales and Distribution (SD) SAP Billing Document Sales Order Item API
  description: Read, cancel, and retrieve billing documents in PDF format from SAP S/4HANA. This OData service (API_BILLING_DOCUMENT_SRV) provides access to billing document headers, items, partners, and pricing elements. Supports invoices, credit memos, debit memos, and other billing document types as part of the order-to-cash cycle.
  version: 1.0.0
  contact:
    name: SAP Support
    url: https://support.sap.com
  license:
    name: SAP Developer License
    url: https://www.sap.com/about/agreements/product-use-and-support-terms.html
servers:
- url: https://sandbox.api.sap.com/s4hanacloud/sap/opu/odata/sap/API_BILLING_DOCUMENT_SRV
  description: SAP S/4HANA Cloud Sandbox
- url: https://{host}:{port}/sap/opu/odata/sap/API_BILLING_DOCUMENT_SRV
  description: SAP S/4HANA On-Premise
  variables:
    host:
      default: localhost
    port:
      default: '443'
security:
- basicAuth: []
- oauth2: []
tags:
- name: Sales Order Item
  description: Operations on sales order item entity (A_SalesOrderItem)
paths:
  /A_SalesOrder('{SalesOrder}')/to_Item:
    get:
      operationId: listSalesOrderItems
      summary: Retrieve items for a sales order
      description: Returns a collection of line items for the specified sales order. Supports OData query options for filtering, sorting, and pagination.
      tags:
      - Sales Order Item
      parameters:
      - name: SalesOrder
        in: path
        required: true
        description: Sales order number
        schema:
          type: string
          maxLength: 10
      - $ref: '#/components/parameters/top'
      - $ref: '#/components/parameters/skip'
      - $ref: '#/components/parameters/filter'
      - $ref: '#/components/parameters/select'
      responses:
        '200':
          description: Successfully retrieved sales order items
          content:
            application/json:
              schema:
                type: object
                properties:
                  d:
                    type: object
                    properties:
                      results:
                        type: array
                        items:
                          $ref: '#/components/schemas/SalesOrderItem'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
  /A_SalesOrderItem(SalesOrder='{SalesOrder}',SalesOrderItem='{SalesOrderItem}'):
    get:
      operationId: getSalesOrderItem
      summary: Retrieve a single sales order item
      description: Returns a single sales order item by its composite key (SalesOrder and SalesOrderItem number).
      tags:
      - Sales Order Item
      parameters:
      - name: SalesOrder
        in: path
        required: true
        description: Sales order number
        schema:
          type: string
          maxLength: 10
      - name: SalesOrderItem
        in: path
        required: true
        description: Sales order item number (6 characters)
        schema:
          type: string
          maxLength: 6
      - $ref: '#/components/parameters/select'
      - $ref: '#/components/parameters/expand'
      responses:
        '200':
          description: Successfully retrieved the sales order item
          content:
            application/json:
              schema:
                type: object
                properties:
                  d:
                    $ref: '#/components/schemas/SalesOrderItem'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
    patch:
      operationId: updateSalesOrderItem
      summary: Update a sales order item
      description: Updates an existing sales order item. Only the fields included in the request body are updated.
      tags:
      - Sales Order Item
      parameters:
      - name: SalesOrder
        in: path
        required: true
        description: Sales order number
        schema:
          type: string
          maxLength: 10
      - name: SalesOrderItem
        in: path
        required: true
        description: Sales order item number
        schema:
          type: string
          maxLength: 6
      - $ref: '#/components/parameters/ifMatch'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SalesOrderItemUpdate'
      responses:
        '204':
          description: Sales order item successfully updated
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
    delete:
      operationId: deleteSalesOrderItem
      summary: Delete a sales order item
      description: Deletes an existing sales order item from the specified sales order.
      tags:
      - Sales Order Item
      parameters:
      - name: SalesOrder
        in: path
        required: true
        description: Sales order number
        schema:
          type: string
          maxLength: 10
      - name: SalesOrderItem
        in: path
        required: true
        description: Sales order item number
        schema:
          type: string
          maxLength: 6
      - $ref: '#/components/parameters/ifMatch'
      responses:
        '204':
          description: Sales order item successfully deleted
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
components:
  parameters:
    filter:
      name: $filter
      in: query
      description: OData filter expression
      schema:
        type: string
    skip:
      name: $skip
      in: query
      description: Number of records to skip
      schema:
        type: integer
        minimum: 0
    select:
      name: $select
      in: query
      description: Comma-separated list of properties to include in the response
      schema:
        type: string
    ifMatch:
      name: If-Match
      in: header
      description: ETag value for optimistic concurrency control
      required: true
      schema:
        type: string
    expand:
      name: $expand
      in: query
      description: Comma-separated list of navigation properties to expand
      schema:
        type: string
    top:
      name: $top
      in: query
      description: Maximum number of records to return
      schema:
        type: integer
        minimum: 0
  schemas:
    SalesOrderItemUpdate:
      type: object
      description: Sales order item update payload
      properties:
        RequestedQuantity:
          type: string
          description: Order quantity
        Plant:
          type: string
          maxLength: 4
        StorageLocation:
          type: string
          maxLength: 4
        ItemBillingBlockReason:
          type: string
          maxLength: 2
        SalesOrderItemText:
          type: string
          maxLength: 40
    SalesOrderItem:
      type: object
      description: Sales order item entity (A_SalesOrderItem)
      properties:
        SalesOrder:
          type: string
          maxLength: 10
          description: Sales order number
        SalesOrderItem:
          type: string
          maxLength: 6
          description: Sales order item number
        SalesOrderItemCategory:
          type: string
          maxLength: 4
          description: Sales document item category
        SalesOrderItemText:
          type: string
          maxLength: 40
          description: Short text for the sales order item
        Material:
          type: string
          maxLength: 40
          description: Material number
        MaterialByCustomer:
          type: string
          maxLength: 35
          description: Material number used by customer
        PricingDate:
          type: string
          format: date
          description: Pricing date
        RequestedQuantity:
          type: string
          description: Cumulative order quantity in sales units
        RequestedQuantityUnit:
          type: string
          maxLength: 3
          description: Sales unit
        NetAmount:
          type: string
          description: Net value of the item in document currency
        TransactionCurrency:
          type: string
          maxLength: 5
          description: SD document currency
        MaterialGroup:
          type: string
          maxLength: 9
          description: Material group
        Batch:
          type: string
          maxLength: 10
          description: Batch number
        Plant:
          type: string
          maxLength: 4
          description: Plant (delivering)
        StorageLocation:
          type: string
          maxLength: 4
          description: Storage location
        ShippingPoint:
          type: string
          maxLength: 4
          description: Shipping point / receiving point
        DeliveryGroup:
          type: string
          maxLength: 3
          description: Delivery group
        ItemBillingBlockReason:
          type: string
          maxLength: 2
          description: Billing block for the item
        SDProcessStatus:
          type: string
          maxLength: 1
          description: Overall processing status of the item
        DeliveryStatus:
          type: string
          maxLength: 1
          description: Delivery status
        OrderRelatedBillingStatus:
          type: string
          maxLength: 1
          description: Billing status
    Error:
      type: object
      description: OData error response
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              description: Error code
            message:
              type: object
              properties:
                lang:
                  type: string
                value:
                  type: string
                  description: Error message text
  responses:
    InternalServerError:
      description: Internal server error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    BadRequest:
      description: Bad request - invalid parameters or payload
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Authentication required or credentials invalid
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: Requested resource not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
    oauth2:
      type: oauth2
      flows:
        clientCredentials:
          tokenUrl: https://{tenant}.authentication.{landscape}.hana.ondemand.com/oauth/token
          scopes:
            API_BILLING_DOCUMENT_SRV: Access to Billing Document API