CompSci497
Advanced XML Programming with XmlPL
Lecture Notes
Friday, March 2nd, 2007

Contents

1. Features of XmlPL Continued
   1. Types
   2. Expressions
   3. Idioms
2. Discuss Projects

• Basic types: boolean, integer, real
• string
  • constant
  • garbage collected
• exception
• Namespaces: prefix, qname
  • What are namespaces in XML?
  • How to create and use an namespace prefix in XmlPL
  • prefix references in XML statements
  • Accessor functions: getPrefix, getName, getURI, getLocalName
  • Two names of a prefix
• void
  • function return type
  • nulling an append expression
• XML types: node, attribute, comment, document, element, pi, text
  • Constructor functions
  • Accessor functions: name, value, target, data
  • Update functions: append, remove, update
  • XML statements as expressions
• Generics: [], ++, <<

• sequence expressions: symantics, ,=
• cast: implicit, explicit
• release
  • Memory management and garbage collection
  • On the fly processing
• null
  • Every type has a null expression
  • null == false

• search and replace (code) (input)
• dispatching on element name (code) (input)
• using a special namespace (code) (input)