Abstract
This chapter investigates how traditional conceptual modeling methods such as entity relationship diagrams might be applied to the complex XML data structures. It then introduces a new conceptual modeling method, asset oriented modeling (AOM), that is particularly suited for the grammar-based data structures of XML. AOM is a modeling method that produces models that can be easily transformed into XML schemata. It also introduces the conceptual model of a simple bookshop. Conceptual modeling is a topic that is not frequently discussed in the context of XML. But XML has become a mainstream enterprise technology with applications far beyond the classical document applications of SGML. In enterprises, XML plays a role as an integration format for diverse data formats. Relational databases are equipped with XML layers, and native XML-database and XML-enabled middleware has appeared on the market. In these application fields, solid engineering practices dominate and conceptual modeling is indeed an issue.
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