CrossRef Export / Registration Plugin

In OJS version 2.4.8 CrossRef Export/Registration Plugin, Where do the the “Items” from “Issue” come from? I noticed that the number of items is not consistent with the available ones in the issue.

In this example, Vol 3 , No 1 (2012) has only 1 Item, but the real issue has more than that. I try to figure out if it is incorrect data in my side or it is a bug in the plugin?

See pic.

The Issue has 7 items !

Also in the editor’s page “Back Issues”, it has 7 items.

I figured it out.

All the articles must record “published” date. Otherwise, the article will not be displayed in CrossRef plugin (or possibly in metadata element <citation_date> used by Google). The record can be modified at

Editor>Submissions>#ID > Editing. see pic for example.

I feel this required publication_date shall be integrated /synced with other date such as the issue publication_date, or latest uploaded date. This way there will not be confusion about the web interface vs. machine interface?

Hi @Y_H,

What version of OJS are you using? (Please include this with your posts.)

Alec Smecher
Public Knowledge Project Team

OJS 2.4.8 . Thanks,


Hi @Y_H

Yes, the items number is the number of those articles that contain DOIs and can be exported/registered…