How to define the "article-article" network?

May 23, 2014 at 3:55 AM
I am wondering how to define a article-article network in the version 1.1. What conditions are used to count the link between article A and article B? On the basis of shared editorship, hyperlinks, or category co-membership? Or all of three conditions are used to count a link between article A and article B? Because we need to specify these in our research. Thanks.