11.1. Schema Overview

I'll be discussing several XML Schema structures in this chapter. The structure is modular with several interdependencies. The following table lists the modules A-Z, with their purpose and dependencies.

Schema	Purpose	Requires
common.xsd	Elements that are common to most of the other schemas
iso_lang.xsd	Defines two subsets of ISO 639 language codes
links.xsd	Defines the link components used in other schemas
meta.xsd	Resource and subject metadata elements	common.xsd, iso_lang.xsd, links.xsd
reference.xsd	Describes the structure and relationship of elements in any XML Schema—in this case, the quick-reference documents (Appendix D)	common.xsd, links.xsd
reslist.xsd	Container for resource metadata	meta.xsd
xml.xsd	Definitions of some XML attributes, including xml:id