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ActionScript 3.0: XML and XMLList (E4X)

ActionScript 3.0 implements ECMAScript for XML (E4X), providing a native way to handle XML.

XML Class

Represents a single XML element, attribute, comment, processing instruction, or text node.

  • Access: Use dot (.) for children and @ for attributes.
  • Methods:
    • appendChild(child), prependChild(child)
    • attribute(name), attributes()
    • child(name), children()
    • descendants(name) (can use .. operator).
    • toXMLString(): Returns the XML as a string.

XMLList Class

An ordered collection of XML objects. Many XML operations return an XMLList.

  • If an XMLList has one item, it can often be treated as an XML object.

Namespace & QName

  • Namespace: Represents an XML namespace (prefix and URI).
  • QName: Represents a qualified name (namespace and local name).

Examples

var data:XML = 
    <root>
        <item id="1">Hello</item>
        <item id="2">World</item>
    </root>;

trace(data.item[0]);       // <item id="1">Hello</item>
trace(data.item.@id);      // 1
trace(data..item.length()); // 2 (descendants)

Static Settings

XML.ignoreWhitespace, XML.ignoreComments, XML.prettyPrinting, XML.prettyIndent.