EDOBE XDOM TAKE 6 IR - PRODUCTSHEET Especificações descarregar pdf (Página 238)

CHAPTER 9: Integrating XML into JavaScript The XML Object 238

If an element is empty in the XML, the corresponding property exists and contains an empty XML object; it

is never

null or undefined.

Accessing XML elements

This sample XML code is used for examples throughout this chapter:

<title lang="en">The Boston Cooking-School Cookbook</title>

<author>Fannie Merrit Farmer</author>

</book>

<title lang="en">The Wonderful Wizard of Oz</title>

<author>L. Frank Baum</author>

</book>

<title lang="en">Alice’s Adventures in Wonderland</title>

<author>Charles "Lewis Carroll" Dodgeson</author>

<author>Charles Dodgeson</author>

<author>Lewis Carroll</author>

</book>

<title lang="en">Gilbert and Sullivan Opera; A History and a Comment</title>

<author>H. M. Walbrook</author>

</book>

</bookstore>

To encapsulate this code in an XML object, serialize it into a string and pass that string to the constructor:

var bookXmlStr = "...";

var bookstoreXML = new XML (bookXmlStr);

Using this example, the root element <bookstore>, is represented by the XML object returned from the

constructor. Each of the

<book> elements is available as a member of the book property of the XML object.

X The Javascript statement bookstoreXML.book; returns the entire list of books.

X The statement bookstoreXML.book[0]; returns the XML object for the first book.

X The statement bookstoreXML.book[0].author; returns all authors of the first book.

For additional ways of accessing elements in the tree, see “

Retrieving contained elements” on page 241,

and “

Creating and accessing namespaces” on page 242.

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EDOBE XDOM TAKE 6 IR - PRODUCTSHEET Especificações Página 238