EDOBE XDOM TAKE 6 IR - PRODUCTSHEET Especificações descarregar pdf (Página 244)

CHAPTER 9: Integrating XML into JavaScript The XML Object 244

If you have assigned an element to a namespace, and have not made it the default, you must use a

Namespace object

to access those elements. For example:

var ns = new Namespace ("http://kids.mybookstore.com");

bookstoreXML.ns::book;

This returns all books that have been assigned to the "kids" namespace.

X If you have set a default namespace, you can still access all objects that do not have any specific

namespace assignment by using a Namespace object

for the empty string, which is the default

creation case:

var emptyNS = new Namespace ();

bookstoreXML.emptyNS::book;

This returns all books that have not been assigned to any namespace.

X To access all elements, regardless of the namespace assignment, you can use an asterisk (*) wild-card

character or

null as the namespace name:

bookstoreXML.*::book;

var nullNS = null;

bookstoreXML.nullNS::book;

Mixing XML and JavaScript

You can enclose JavaScript statements in curly brackets, and embed them into XML. The JavaScript part is

evaluated during the construction of the XML.

For example, this function returns an XML value, in which embedded JavaScript variables will be evaluated

and included:

function makeXML (first, last) {

return <person first={first} last={last}>{first + " " + last}</person>;

}

Calling this function:

makeXML ( "Jane", "Doe" );

results in this XML:

You can also use these operators on XML elements:

X Use the plus operator, +, to combine XML elements into a list.

X Use the == operator to make an in-depth comparison of two XML trees.

XML lists

ExtendScript defines an XMLList object, which is identical to the XML object except that you can create it

by passing it an XML list, and it creates an XML list rather than an XML tag.

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EDOBE XDOM TAKE 6 IR - PRODUCTSHEET Especificações Página 244