A unique alphanumeric key that is assigned to a article is assigned in SAP Business One.

the item number is a Clear labelling for each article in SAP Business One. It serves the Identification and management of articles and is used in all modules that refer to articles, such as Sales, purchasing, warehouse managementProduction and service.
1. important properties of the article number
- Uniqueness: Each article number must unique be. There must not be two items with the same number. SAP Business One prevents this with a Error message.
- Length: The article number can be up to 50 characters be long and Letters, numbers and certain Special characters included.
- Allowed special characters: ~, #, &, @, /, ;, ', £, $, (, ), -, _, +, ',', '.'.
- Special characters not allowed: *, =, , %, !, ^, ?, {, }, |.
- Immutability: As soon as an article in a transaction (e.g. in a document or service call) was used, the article number no longer changed or deleted become.
2. use of the article number
The article number is used in various areas of SAP Business One:
- item master data: To the Identification and management of articles.
- Sales and purchase receipts: To select and manage the articles in Invoices, orders and other documents.
- Warehouse management: To the Tracking stock levels and movements.
- Production: For the identification of Components and finished products in production orders.
- Service: For use in Service calls and contracts.
3. number series and article number assignment
- Automatic numbering: Article numbers can be assigned via Number series are assigned automatically.
- Manual allocation: The option "Manual" allows you to freely enter an article number.
- Number series selection: Number series can consist of a Drop-down list next to the field "Item no." can be selected.
4. barcode integration
The article number can be marked with a barcode be linked.
- Supported formats: European article number (EAN 13) and Code 39.
- Stockkeeping unit (SU): The barcode can be read with the Unit of measure (ME) to facilitate inventory management.
5. recommendation for article number assignment
- Meaningful article numbers: It is recommended to use article numbers that Conclusions on the article allow.
- If this is not possible, you can also Predefined or existing numbers be used.

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