See below for a list of frequently asked questions and answers about the PKP Index.

What is the PKP Index?

The PKP Index is a database of articles, books, and conference proceedings using PKP's free, open source Open Journal Systems, Open Monograph Press, and Open Conference Systems software applications. The Index covers all subject areas and includes content from publishers from around the world.

Who can register for the PKP Index?

Any publication(s) that are utilizing PKP Software (Open Journal Systems, Open Monograph Press, and Open Conference Systems) are welcome to register for the Index. Criteria for inclusion must be met to be accepted.

What is the criteria for inclusion in the PKP Index?

To be accepted into the Index, your journal, press, or conference site must: 1) be utilizing PKP Software; 2) include at least one article, chapter, or proceeding, and 3) provide a registered ISSN for journals. Tests, demonstrations, and empty installations will be rejected.

How can I register for the PKP Index?

Visit the Index registration page in order to first register for a PKP Index account. After you have done so, click the “Add Publication” and complete the registration form. All publications must be added individually.

Beyond the criteria for Inclusion in the PKP Index, what else can I do to ensure my publication is approved?

While not criteria for inclusion, we would recommend that your publication’s website include details about your publication as well as a visible listing of your Editorial Board.

How long will it take for my publication(s) to be approved?

Publications are reviewed daily and can take up to one week to be reviewed and enabled.

Where can I find my OAI Base URL?

I am receiving an OAI error message when I try to add my publication to the Index.

This could be for a number of reasons. Please review these posts from the PKP Community Support Forum regarding similar errors.

Error says “URL already in use” and I cannot add my publication.

This is most likely because your publication has already been registered in the Index and/or there is a duplicate record in the Index. Send an email with the Publication Name and URL to and we will look into it.

My publication’s articles are not appearing in my PKP Index record.

First, ensure that your individual articles are added to the issue’s Table of Contents. This will allow the metadata for each article to be available for harvesting via OAI. For more information visit this forum post

My publication’s articles from the newest issue are not appearing in my PKP Index record.

The Index harvester will harvest your metadata on a weekly basis. If the newest articles do not appear after a week, please send an email detailing your error to: Be sure to include the publication name(s) and URL(s).

I cannot locate my publication(s) in the PKP Index.

Using the search box, include quotation marks ( “ “ ) around your publication name. If your publication is not found this way, you can browse all of the PKP Index publications by title.

Why was my publication not accepted into the PKP Index?

Most likely your publication was not accepted into the Index because it failed to meet all of the criteria for inclusion. You can find the criteria for inclusion above.

Can I index a publication that is not using PKP software?

No. All publications must be using PKP software in order to be included in the Index.

How can I update information about my journal or press in the Index?

In order to update information in the Index, you will need to log in with your credentials and click “Edit Publication” for the journal or press you want to update.

Contact Us

The PKP Index is an initiative of the Public Knowledge Project.

For PKP Publishing Services please use the PKP|PS contact form.

For support with PKP software we encourage users to consult our wiki for documentation and search our support forums.

For any other correspondence feel free to contact us using the PKP contact form.

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