<das:element-sequence> tag describes a sequence of elements in the resulting xml.
<das:element-sequence data-source="ds1" name="employee" namespace-prefix="ns" namespace-uri="http://mycorporation.com">
Attributes:
id - unique identifier of this resource in the current processing job.
name - the name of the element in the resulting xml.
namespace-prefix - the prefix of the namespace of the resulting xml tag.
namespace-uri - the uri of the namespace of the resulting xml tag.
Children elements:
<das:element> - it's like an element-sequence only it can appear only once in output xml.
<das:element-sequence> - element-sequences can be nested.
<das:attributes> - element attributes in the resulting xml.