| http://www.w3.org/ns/prov#value | - An example of an open source of such data is the National Institute of Standards and Technology (NIST), whose growing family of web-based portals to scientific and technical data is an important library reference source.11 An example of a commercial source is Knovel, an aggregation of data reference works from publishers such as Wiley and Elsevier.12 Another example is BioBase, whose Knowledge Li
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