KEYWORDS: Detection and tracking algorithms, Digital libraries, Reliability, Mining, Lithium, Internet, Prototyping, Human-machine interfaces, Optical character recognition, Analytical research
Modern digital libraries offer all the hyperlinking possibilities of the World Wide Web: when a reader finds a
citation of interest, in many cases she can now click on a link to be taken to the cited work. This paper presents
work aimed at providing the same ease of navigation for legacy PDF document collections that were created
before the possibility of integrating hyperlinks into documents was ever considered. To achieve our goal, we need
to carry out two tasks: first, we need to identify and link citations and references in the text with high reliability;
and second, we need the ability to determine physical PDF page locations for these elements. We demonstrate the
use of a high-accuracy citation extraction algorithm which significantly improves on earlier reported techniques,
and a technique for integrating PDF processing with a conventional text-stream based information extraction
pipeline. We demonstrate these techniques in the context of a particular document collection, this being the ACL
Anthology; but the same approach can be applied to other document sets.
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