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Introducing the New Full-Featured Online Korean Journal of Radiology

In this Internet era, the importance of online literature cannot be overstated. Online literature is characterized by its easier accessibility and more versatile functionality compared with hard-copy literature. For these reasons, almost all eminent medical journals have online versions of their journals. The Korean Journal of Radiology (KJR) has been publishing the full-text online version of the printed journal since 2002. In the best interest of our readership, we have recently upgraded the online KJR to a fullfeatured electronic journal and would like to introduce its new features to our readers. The new online KJR which is now available at both http://www.kjronline.org and http://kjronline.org, is a free access journal as the KJR has always been since its first issue. Full-text articles are provided at no charge at these web sites both in the interactive XML (HTML) format and in PDF. The KJR further advocates the ‘free access to journals’ policy that is currently promoted by several organizations such as PubMed Central (PMC) (http://www.ncbi.nlm.nih.gov/pmc) and Synapse (http://synapse.koreamed.org), by participating in these two public digital archives of biomedical and life sciences journal literature. As of August 2009, we had completed the deposition of full-text XML (HTML) and PDF of all previously published KJR articles to PMC and Synapse. Since then we have been depositing new KJR articles to both archives as early as they are published. Therefore, all full-text KJR articles are essentially simultaneously available online in the same format at the journal website, PMC, and Synapse. The most important improvement in the new online KJR compared with the previous platform is undoubtedly that the new platform is equipped with a complete reference linking with other related journals. Each KJR article is given a unique Digital Object Identifier (DOI) string via CrossRef which is the official DOI link registration agency for scholarly and professional publications. The CrossRef DOI allows a direct link from an article that has cited a KJR article to the KJR article. For example, go to the Radiology web site (http://radiology.rsna.org) and look at the reference list of an article by Park et al. (1) published in the September 2008 issue. Notice that at the end of reference 7 (which is a KJR article [2]), you see a hyperlinked text ‘CrossRef.’ Click on the ‘CrossRef’ and you go directly to the full-text KJR article (2). The full-text article is provided at Synapse as Synapse is currently serving as the landing site for KJR for this direct reference linking via the CrossRef DOI. Reference linking from articles citing KJR articles to the cited KJR articles is also possible via Medline, i.e. PubMed. In the previous example, note that next to the ‘CrossRef’ is another hypertext ‘Medline.’ A click on the ‘Medline’ will direct you to the PubMed page that contains the abstract of the KJR article and two hyperlinked buttons in the right upper corner that read ‘Korean J Radiol FULL TEXT ARTICLE’ and ‘FREE full text article in PubMed Central’, respectively. Click on each button and you go immediately to the full-text KJR article (2) in the online KJR and in PMC, respectively. Likewise, direct reference linking from a KJR article to articles cited by the KJR article is also readily available with a single mouse click via CrossRef DOI. For example, go to online KJR and look at the reference list of an article by Kim et al. (3) published in the JanuaryFebruary 2009 issue. Notice that at the end of virtually every reference in the reference list, there are two hyperlinked buttons that read ‘PubMed’ and ‘CrossRef’, respectively. The ‘CrossRef’ button provides a direct link from the KJR article to the reference article. The ‘PubMed’ button also gives a link to the reference article. The latter button directs you to the PubMed page that has the abstract of the reference article and the link to the original source of the reference article, e.g. the online journal homepage which published the article. Readers can also access KJR articles using typical litera-