Skip to main content
. 2016 Jan 5;11(1):e0146300. doi: 10.1371/journal.pone.0146300

Fig 5. Analysis of URL mentions of research resources in papers.

Fig 5

We show the top 30 resources sorted by the number of times URLs match a resource in a paper. Multiple mentions of a resource in a single paper are not counted as additional data points. For this analysis there were 100K of 500K detected URLs that matched one of the following: the exact URL present in the resource registry, an alternative or old URL noted in the resource registry, a URL that redirects to a resource registry item, or a simplification of the URL construct to the core resource, for example http://clinicaltrials.gov/NCI12345 would be counted as a reference to ClinicalTrials.gov. 500K URLs were detected in 700K papers (open access subset of PubMed Central, accessed 9/2014), the 400K that did not match registry items were not included in this analysis, but are included in other analysis of the NER system. Inset: URL status of main web page as assessed the week of 8/15/2014. An automated tool checks each web site in the registry to determine if the site is up or down each week and results are accumulated for curators. Curators are alerted when the site is down for 3 consecutive weeks.