The XML APIs introduce some new internal data types to Vortex. Note that these are not SQL data types, and cannot be stored outside of memory, e.g. in a table.
These types cannot be printed directly. For example just printing
$var when it contains an
xmlNode will simply print
(xmlNode). The methods for converting them to strings are
provided in their individual descriptions.
As with all Vortex data, there is no direct memory management
necessary. All allocating and freeing is handled by Vortex for you.
However, to conserve memory, it is recommended to make sure the
variable(s) used are either deleted (i.e.
<$doc = >) or go out
of scope (i.e. use
<local> variables) when done, especially
when accessing large documents with the tree API.