#8 Add XML as a native "type" for Rexx.

[Rick McGuire]

The ECMASCRIPT E4X standard defines an very easy to use
and powerful model for processing XML data. E4X makes
an extension to the ECMASCRIPT syntax and data model
that makes XML processing more "natural" to the
ECMASCRIPT (Javascript) programmer. This extension allows

• A replacement to the W3C DOM APIs that feels like a
  more natural way to access XML data from ECMASCRIPT.
  It feels like it belongs.

• The ability embed XML data directly within program
  source as XML literals.

• Support for XPath lookups in an XML tree.