... registry, and the need for a reference model for building distributed digital libraries. Findings By building a reference model, digital library system development can move forward so that digital libraries become less silos of information and more interoperating collections of distributed services...

... and techniques from these two areas, that is, to analyze the usability of the InfoHab digital library, having as theoretical base the constructivist model of user study proposed by Carol Kuhlthau and the criteria of usability established by Jacob Nielsen. Design/methodology/approach In order to do so...