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CHAPTER 10: Scripting Access to XMP Metadata XMPScript object reference 273

There is one static property on the class that provides XMP version information; there are no JavaScript

properties in the instance. The object encapsulates a set of metadata properties, which you access

through the object functions.

The generic functions getProperty()

, setProperty(), and deleteProperty() allow you to manipulate all types

of properties, when used with appropriately composed path expressions. For convenience, the object also

provides more specific functions for use with specific types of properties, such as arrays.

XMPMeta object constructors

To create an XMPMeta object, use the new operator. The constructor accepts an RDF/XML serialized

metadata packet as a string, or as an array of numbers that contain only byte values. It returns the new

object. If no argument is supplied, the new object is empty; you can use the object’s functions to add

namespaces and properties.

The first call to any of these constructors initializes the library by registering the standard namespaces and

aliases.

new XMPMeta ( ); // creates an empty object

new XMPMeta ( packet );

new XMPMeta ( buffer );

XMPMeta class properties

The XMPMeta class provides this static property. It is not necessary to create an instance to access it.

XMPMeta class functions

The XMPMeta class provides these static functions. It is not necessary to create an instance to call them.

packet

A String containing an XML file or an XMP packet.

buffer

An Array of Number. The UTF-8 or UTF-16 encoded bytes of an XML file or an XMP packet.

This array is the result of

XMPMeta.serializeToArray().

version

String The descriptive string for this version of the XMP Toolkit.

deleteAlias()

XMPMeta.deleteAlias (aliasNS, aliasProp)

aliasNS

The namespace URI string. See “Schema namespace string constants” on

page 262.

aliasProp

The alias property string.

Deletes the specified alias; does not delete the aliased property. If the alias does not exist, does

nothing.

OTE: Not yet implemented in the XMP Toolkit.

Returns

undefined.

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EDOBE XDOM TAKE 6 IR - PRODUCTSHEET Especificaciones Pagina 273