XML Schema Complete Reference, The

7.3. Concepts and Observations

Chapter 6 has many sections that cover concepts or observations that might otherwise appear in this chapter. You should read Chapter 6 before proceeding with this chapter.

The only observation that seems worth repeating pertains to namespaces. Although trivial to implement, one of the most difficult tasks when planning an XML schema is determining the target and default namespaces. Frequently, initial XML schema documents do not contain any namespace information other than where to locate the Schema for Schemas (see Listing 7.1). The documents evolve to include namespaces and target namespaces as needed. This approach is often acceptable. A schema should absolutely specify a target namespace, however, if the schema ...