International Standard Book Number, the international code for identifying a particular product form or edition of a publication, typically a monographic publication.


Within an ISBN, spacing, hyphens, and punctuation should be preserved.
ISBNs can be assigned to books, reports, standards documents, conference proceedings, and dissertations. The <isbn> element can be used to record all such numbers inside bibliographic citations (<element-citation> and <mixed-citation>). Within a mixed-style citation, the text “ISBN:”, if present, should be kept as text within the citation but not placed inside the <isbn> element. Within an element-style citation, the text “ISBN:”, if present, should be removed from the citation and also not placed inside the <isbn> element.
In the rare case that a serial publication has an ISBN, the <isbn> element inside the article metadata (<article-meta>) is used to record that value. If there is more than one ISBN, the @content-type attribute may be used to differentiate between ISBNs or explain the reason for a particular ISBN.


Content Model

<!ELEMENT  isbn         (#PCDATA %isbn-elements;)*                   >

Expanded Content Model

(#PCDATA | x)*


Any combination of:

This element may be contained in:

Example 1

Inside article metadata:
<isbn content-type="conf-proc">978-0-7354-1164-7</isbn>
<fpage seq="1">113</fpage>

Example 2

As part of the description of a product being reviewed:
<source>Image-Guided Radiation Therapy in Lymphoma Management. 
The Increasing Role of Functional Imaging.</source>
<name name-style="western"><surname>Macklis</surname>
<given-names>R. M.</given-names></name>
<name name-style="western"><surname>Conti</surname>
<given-names>P. S.</given-names></name>
<publisher-name>Informa Healthcare</publisher-name>, 
Essex, United Kingdom, 2010, Price: <price>$324.00</price>. 
ISBN: <isbn>9781420058741</isbn>, 80 p. (hardcover)
<given-names>Deborah A.</given-names>
<given-names>B. Tommie</given-names>
<source>Wildflowers of the Washington Area</source>
<year iso-8601-date="2002">2002</year>
<publisher-name>Lippman, Ltd.</publisher-name>
<publisher-loc>Bethesda, MD</publisher-loc>
<isbn>0-23-8675-309</isbn>, includes a CD-ROM,
<price>$19.95</price> (Used 12.50 when available)
<date date-type="accepted" iso-8601-date="1999-01-29">