Abstract
Resource level metadata markup alone cannot describe the rich, granular, associative and recombinant information objects potentially contained in modern digital libraries. Today, powerful mechanisms for content and structure description of documents exists in the form of domain specific markup languages such as MatML and MathML. Mechanisms for integrating resource level markup with domain specific markup documents in these languages are required. In the context of the NSDL GREEN digital library, issues and approaches to markup integration are critically discussed.
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