Discussion of XML (extensible markup language) and the traditional DTD (document type definition) format focuses on efforts of the World Wide Web Consortium's XML schema working group to develop a schema language to replace DTD that will be capable of defining the set of constraints of any possible data resource. (Contains 14 references.) (LRW)

Describes the creation of an interactive retrieval system for electronic numeric files that was developed at Cornell University's (New York) Mann Library. Topics discussed include user characteristics; special data characteristics; quality control; software; hardware; data preparation; database design and construction; interface; subject indexing…