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Product numbers


E-books must be uniquely identified within the book trade. For this purpose, standard identifiers are generally used, which also represent an important descriptive element of media in librarianship. The most important identifiers for e-books are the ISBN and the digital object identifier (DOI), which also ensures persistent identifiability on the web.

ISBN - mandatory, if available

Definition

The ISBN (International Standard Book Number) is the globally valid identification number for monographic publications.

General notes

 

This refers to the ISBN of the e-book ("eISBN").

For the ISBN of the print edition, see the table below.


MARC 21 Onix 3.0.8 Reference Names
 		Onix 3.0.8 Short Tags

Format

020 $a

<ProductIdentifier>
/ONIXMessage/​Product/ProductIdentifier

<ProductIDType>
/ONIXMessage/​Product/ProductIdentifier/ProductIDType with value "02 (ISBN-10) or "15" (ISBN-13) from code list 5

<IDValue>
/ONIXMessage/​Product/ProductIdentifier/IDValue

<productidentifier>

        <b221> with value "02 (ISBN-10) or "15" (ISBN-13) aus from code list 5

        <b244>

Format notes

In MARC 21, the ISBN may be specified without hyphens or with hyphens.

In Onix, the ISBN is given without hyphens.

Example

020 ##$a9783030605315

<ProductIdentifier>

        <ProductIDType>15</ProductIDType>

        <IDValue>9783030605315</IDValue>

</ProductIdentifier>

<productidentifier>

        <b221>15</b221>

        <b244>9783030605315</b244>

</productidentifier>

ISBN of the print edition - mandatory, if available
Definition If a publication appears as an e-book and a print edition with the same content in parallel, it is useful to also specify the ISBN of the print edition in the metadata for the e-book.
General notes
 		---

MARC 21 Onix 3.0.8 Reference Names
 		Onix 3.0.8 Short Tags
Format
 		776 $i $n $z

<RelatedProduct>
/ONIXMessage/​Product/RelatedMaterial/RelatedProduct

<ProductRelationCode>
/ONIXMessage/​Product/RelatedMaterial/RelatedProduct/ProductRelationCode with value "13" from code list 51

<ProductIdentifier>
/ONIXMessage/​Product/RelatedMaterial/RelatedProduct/ProductIdentifier

<ProductIDType>
/ONIXMessage/​Product/RelatedMaterial/RelatedProduct/ProductIdentifier/ProductIDType with value "02 (ISBN-10) or "15" (ISBN-13) from code list 5

<IDValue>
/ONIXMessage/​Product/RelatedMaterial/RelatedProduct/ProductIdentifier/IDValue

<relatedproduct>

        <x455> with value "13" from code list 51

        <productidentifier>

                <b221> with value "02 (ISBN-10) or "15" (ISBN-13) from code list 5

                <b244>

Format notes

If the ISBN of a parallel print edition is transported in field 776, subfields $i and $n must be filled with:

$iErscheint auch als$nDruck-Ausgabe (in German)

The ISBN of the parallel print edition is recorded in subfield $z. 

 ---
Example

776 18$iErscheint auch als$nDruck-Ausgabe$z9783030605308

<RelatedProduct>

        <ProductRelationCode>13</ProductRelationCode>

        <ProductIdentifier>

                 <ProductIDType>15</ProductIDType>

        <IDValue>9783030605308</IDValue>

        </ProductIdentifier>

</RelatedProduct>

<relatedproduct>

        <x455>13</x455>

        <productidentifier>

                 <b221>15</b221>

        <b244>9783030605308</b244>

        </productidentifier>

</relatedproduct>

DOI, Digital Object Identifier - mandatory, if available
Definition

The Digital Object Identifier (DOI) is a persistent document identifier used to link and cite documents of all types on a digital network.
General notes
 		---

MARC 21 Onix 3.0.8 Reference Names
 		Onix 3.0.8 Short Tags
Format
 		024 $a $2doi

<ProductIdentifier>
/ONIXMessage/​Product/ProductIdentifier

<ProductIDType>
/ONIXMessage/​Product/ProductIdentifier/ProductIDType with value "06" from code list 5

<IDValue>
/ONIXMessage/​Product/ProductIdentifier/IDValue

<productidentifier>

        <b221>  with value "06" from code list 5

        <b244>
Format notes
 		--- ---
Example 024 7#$a10.1000/182$2doi

<ProductIdentifier>

        <ProductIDType>06</ProductIDType>

        <IDValue>10.1000/182</IDValue>

</ProductIdentifier>

<productidentifier>

        <b221>06</b221>

        <b244>10.1000/182</b244>

</productidentifier>


2023-06-01
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