I'm happy to announce the availability of a corpus related to sentiment/perspective, for purposes of non-commercial research.<br><p>
The University of Maryland Death Penalty Corpus (or UMD DP corpus, for short), at <a href="http://umiacs.umd.edu/~resnik/dp/">http://umiacs.umd.edu/~resnik/dp/</a>, is a collection of material from Web sites
that express views for and against the death penalty. It was compiled
by <a href="http://www.umiacs.umd.edu/%7Esgreene/">Stephan Greene</a> as
part of his <a href="http://www.umiacs.umd.edu/%7Esgreene/SGreeneDissertationFinalDist.pdf">doctoral
dissertation</a>:</p><blockquote>
Greene, Stephan C. (2007).
<em>Spin: Lexical Semantics, Transitivity, and the Identification of Implicit Sentiment</em>.
Doctoral Thesis, University of Maryland, College Park, MD. UMI Order Number: AAI3277427, ISBN 978-0-549-16038-0.
<a href="http://www.umiacs.umd.edu/%7Esgreene/SGreeneDissertationFinalDist.pdf">http://www.umiacs.umd.edu/~sgreene/SGreeneDissertationFinalDist.pdf</a>
</blockquote>
Key elements of that work are reported more briefly in:
<blockquote>
Greene, Stephan and Philip Resnik, "More than Words: Syntactic Packaging and Implicit Sentiment",
<em>Proceedings of Human Language Technologies: The 2009 Annual Conference of
the North American Chapter of the Association for Computational Linguistics</em>
June, 2009, Boulder, Colorado, pp. 503-511.
Association for Computational Linguistics},
<a href="http://www.aclweb.org/anthology/N/N09/N09-1057.pdf">http://www.aclweb.org/anthology/N/N09/N09-1057.pdf</a>.
</blockquote>The downloadable corpus is organized in a way that should make it easy to replicate the cross-validation train/test splits in Stephan's study, to facilitate direct comparisons among alternative methods.<br>
<br>Have fun, and happy holidays,<br><br> Philip<br>