NOTE: These slides have not been updated since 2003. They have been superseded by the book An Introduction to XML and Web Technologies Addison-Wesley, and the accompanying online material. Please see http://www.brics.dk/ixwt/ for more information. Anders Møller and Michael Schwartzbach, February 2006

THE XML REVOLUTION  -  TECHNOLOGIES FOR THE FUTURE WEB

DTD, XML Schema, and DSD

Overview:

• Schemas and schema languages - defining the syntax of your own XML language
• Choosing a schema language - lots of alternatives

• DTD - Document Type Definition - an overview
• Example DTD - the recipe example
• Problems with DTD - top 15 reasons for not using DTD

• Design requirements - how to design a schema language in W3C
• XML Schema - the design
• A small example - the business-card example
• Overview - the central constructs and ideas
• Constructing complex types - requirements for attribute and content presence
• Constructing simple types - requirements for attribute values and character data
• Local definitions - inlined declarations, anonymous types, and overloading
• Type derivation and substitution groups - the type system
• Annotations - self-documentation
• Schema inclusion and redefinition - modularity and reuse
• Namespaces - constraining the use of namespaces
• Attribute and element defaults - side-effects of validation
• Identity constraints - uniqueness and keys
• A larger example - the recipe example
• Problems with XML Schema - 15 reasons why we haven't seen the last schema language

• Document Structure Description 2.0 - central aspects
• Example - the recipe example
• Rules - describing elements
• Boolean expressions - expressing element properties
• Regular expressions - describing attribute values and chardata
• Normalization - whitespace, upper/lower-case, defaults
• Inclusion and extension - modular descriptions

• Links to more information

COPYRIGHT © 2000-2003 ANDERS MØLLER & MICHAEL I. SCHWARTZBACH