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Saturday was day 2 of the ASIS&T pre-conferences for me. Friday morning contained an interesting overview of DSpace and Saturday was a workshop on Classification Research. Presentations in the morning discussed tagging, building of communities through user-based categorization, and systems that support knowledge creation/SenseMaking.
The discussions that grew out of the presentations focused on the relationship of tagging systems to classification/categorization structures and there were some interesting examples presented including LibraryThing and PennTags. . .