XMP namespaces and properties. Where to find a list of these therms?

Hi

I´m trying to create a script that stores some xmp informations of photos (like EXIF Data Created...IPTC Core Creator and so on) to variables.

var selected = app.document.selections

var xmp = selected[0].metadata

var creationData = xmp.read (namespace, property)

var author = xmp.read (namespace, property)

In order to do it I need to know the right namespace and property. The Bridge JavaScript reference does not show me a list of what I can use. Do you have any reference to follow?

I´m having no sucess looking over internet. Thank you a lot (again) for the help

Best Regards

Gustavo.