Due to the high volume of ISBN requests being received, staff of the Legislative Library have created this FAQ. Links to further information on ISBN are included in these answers. Should you have any further questions, please contact us at


An ISBN (International Standard Book Number) is a unique international identifier for publications. The ISBN program is international in scope and is directed in Canada by Library and Archives Canada (LAC). The Legislative Library assigns ISBNs to Ontario government documents on behalf of LAC. ISBNs are used to quickly and efficiently identify, order, distribute and retrieve publications.

ISBN in General

  • Complete the ISBN Request form following the instructions.
  • Submit the form as an attachment and send it to
  • Include the date that the ISBN is needed in the subject line of your email.
  • Submit the request only once.

We will respond to your request within 10 working days.

ISBNs are used to uniquely identify publications. Staff of the Legislative Library give Ontario government publishers these numbers to put on their publications on behalf of Library and Archives Canada (external site).

If you are publishing the document only one time, you require an ISBN. If you plan to publish your document on a regular basis, such as an annual report, you require an ISSN.

No. Once an ISBN is assigned to a publication it can not be reused for another publication even if the original ISBN was assigned in error.

Yes. You can obtain an ISBN using the working title. However, you should inform us about the final title.

Yes. The Roman numeral X is used instead of the number 10. For more information on the structure and meaning of the ISBN see the International ISBN Agency (external site).

No. There is no connection between the ISBN and copyright.

Yes. The number of copies produced is not relevant to the ISBN assignment.

No. ISBNs are assigned to publications that are distributed to the public. If the publication is only being distributed internally, it does not require an ISBN.

Publications that Require ISBN

Examples include:

  • Printed books and pamphlets
  • Internet publications (PDF, TXT, HTML)
  • CD-ROMs
  • DVDs
  • Multi-volume sets
  • Maps
  • Bilingual publications
  • Braille publications
  • Educational kits and software

Examples include:

  • Ephemeral material such as recipes
  • Software that is not educational or instructional
  • Websites


Yes. The size of the publication is not relevant for the ISBN assignment.

No. If the text has not changed, a new ISBN is not required.

Yes. A new ISBN is assigned if there has been a change to any part of the publication. However, minor changes to a publication, such as a new cover design, change in price or typo corrections do not require a new ISBN.

Yes. For example, a publication issued in print, pdf, and html requires three ISBNs.

Yes. For example, a publication issued in separate English and French editions require two ISBNs.

It depends. If the loose-leaf publication will not be updated, it is assigned an ISBN. If the loose-leaf publication will be updated, it is assigned an ISSN.

Yes. An ISBN is assigned to the entire set and a different ISBN is assigned to each volume within the set.


No, but an ISBN may be assigned each year to identify the specific year of the report. However, the publication must firstly be assigned an ISSN.

Using the ISBN in Your Publication

Print publications

Put the ISBN on the verso of the title page (copyright page) or foot of the title page, and on the lower section of the outside back cover.

Bilingual publications (French and English bound together)

Put the same ISBN on the verso of both the English and French title pages.

Multi-volume sets

The ISBN for the set as a whole should be put together with the ISBN for the particular volume.

Example for Vol. 1:

ISBN 978-1-4249-6171-9 (set)
ISBN 978-1-4249-6172-6 (v.1)

Example for Vol. 2:

ISBN 978-1-4249-6171-9 (set)
ISBN 978-1-4249-6173-7 (v.2)

PDF publications

Put the ISBN on the first page of the item.

HTML publications

Put the ISBN on the first screen of the item.

CD-ROMs and DVDs

Put the ISBN on the disk label and the container and also on the initial screen when the content is first accessed.

Educational kits

Put the ISBN on the packaging label of a kit that includes a variety of formats.

Publications issued in more than one format

Put all assigned ISBNs on each format and qualify the ISBN to indicate the format.


ISBN 978-1-4249-8500-5 (Print)
ISBN 978-1-4249-8501-2 (HTML)
ISBN 978-1-4249-8502-9 (PDF)

What if Our Publication Plans Change?

Yes. There is no expiry date for an ISBN. However, if your ISBN was assigned prior to January 1, 2007, you must contact to get it converted to a 13-digit format.

Yes. You should inform us of the title change so that we can update the records.

No. The CD-ROM is a new format and requires its own ISBN.

If you are not going to publish, notify us at