Dublin Aware Asset
A Dublin Aware Asset is defined in the following WSDL:
Taking another step up the hierarchy is the dublin-aware-asset, which brings in metadata capabilities. This type is what holds the actual metadata values as well as where the Metadata Set relationship is defined.
The dublin-aware-asset references the metadata complexType, which is defined via the following WSDL:
The metadata object contains the familiar "wired" fields from the metadata pane of an edit screen for metadata-aware objects. Most take a String - with the exception of the date fields, which take a long-formatted date String - of the format CCYY-MM-DDThh:mm:ss, such as 2006-06-25T17:15:33, which would be 5:15:33pm on 25 June, 2006 (more information here: http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/#dateTime).