Story: An object in Fedora-Thing represents an absorption spectrometer measurement. Fedora-Thing manages an image and a numerical dataset for the object. The object also has something analogous to an external datastream representing the current state of metadata description of the object; this is maintained in an external system.
In this external system, a researcher goes through the collection by date and timestamps, selecting those objects generated by the same experiment, and assigns to all of them an investigation identifier, a project identifier, and her name as creator, thus updating the pre-existing metadata record. Each experiment typically includes several hundreds to thousands of objects. When these data are requested through Fedora it retrieves them from the external system, constructing the URL as necessary similarly to the existing Fedora service URL substitutions.
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