Discusses the introduction of the use of XML (Extensible Markup Language) in publishing electronic journals. Topics include standards, including DTDs (Document Type Definition), or document type definitions; aggregator requirements; SGML (Standard Generalized Markup Language); benefits of XML for e-journals; XML metadata; the possibility of incorporating different XML languages within one document, especially for scientific articles; and views of publishers. (Contains 56 references.) (LRW)