Building digital libraries from simple building blocks

Metadata harvesting has been established by the Open Archives Initiative as a viable mechanism for connecting a provider of data to a purveyor of services. The Open Digital Library model is an emerging framework which attempts to break up the services into appropriate components based also on the basic philosophy of the OAI model. This framework has been applied to various projects and evaluated for its simplicity, extensibility and reusability to support the hypothesis that digital libraries should be built from simple Web service‐like components instead of as monolithic software applications.