Those who do meet the obligations, often find themselves having to manually copy and resolve references for each article that they publish. For smaller publishers, it is much more difficult. For larger publishers with skilled production departments, this requirement to link their references is relatively easy to meet. When members join Crossref and start registering DOIs and metadata for their content, they also make a commitment to link references in their content to the relevant sources using DOIs. We have built pdf-extract as part of an overall effort to make it easier for small and medium-sized publishers to meet Crossref’s linking requirements and to participate in Crossref’s Cited-by service.
In practice, this means the pdf-extract tools are unlikely to work with older journal articles that were produced before the advent of computer typesetting. It will not work with PDFs which contain scanned bitmap images of pages.
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The pdf-extract tools will only work with full text journal article PDFs. References extracted using pdf-extract can, in turn, be resolved to the appropriate Crossref DOI using Crossref’s citation resolution tools, Simple Text Queryand the experimental Crossref Metadata Search. The pdf-extract tools allow you to identify and extract the individual references from a scholarly journal article. Pdf-extract is an open source set of tools and libraries for identifying and extracting semantically significant regions of a scholarly journal article (or conference proceeding) PDF. Since the retirement of this project, we recommend that you use the excellent Cermine instead.
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