You may or may not be aware of a joint project between OhioLINK and OCLC Research to analyze usage patterns of library materials. The primary goal is to better understand the usage patterns of books in academic libraries: what books are (or are not) being used, how many copies are needed, the ideal size of subject collections, etc. The project combines OhioLINK circulation data and WorldCat bibliographic and holdings data together to perform this analysis.
One of the interesting outputs of the project, besides the report, is a downloadable file which contains the OhioLINK circulation data used as part of the project. The data is licensed under and Open Data Commons Attribution License, which means that library developers can use it to prototype new tools libraries as long as they attribute the data. Personally, I'm interested in if a reccomender tool might be built from the data.
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