Open Citation Project	ACM Digital Libraries, June 2000, San Antonio, TX, USA	A joint NSF - JISC International Digital Libraries Project
Index  of  presentation	Reference linking: expectations and constraints High anticipation Demand for forward (in time) - what has subsequently cited a paper - as well as back in time (conventional) reference linking Constraints Accuracy, reliability of reference data in papers Access to digital, online content Multiple versions of papers (the Harvard, or "appropriate copy", problem)
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