Description
The Constructor can take a Pear::DB Data Source Name (DSN) and will then connect
to the database; or a PEAR::DB object handle, if you already connected the
database before. Providing sql-strings will not work.
If you provide only a DSN, you have to add
a DB_result object, SQL statment or an array later.
The $root parameter is used, if you want to provide another name for your
root-tag than <root>. If you give an empty string (""), there will be no
root element created here, but only when you add a resultset, array or
SQL Statment.
And the first tag of this result is used as the root tag.