/**
* Create and add a default Dublin Core schema to this metadata.
*
* <p>This method return the created schema to enter information
*
* @return schema added in order to work on it
*/
public DublinCoreSchema createAndAddDublinCoreSchema() {
DublinCoreSchema dc = new DublinCoreSchema(this);
dc.setAboutAsSimple("");
addSchema(dc);
return dc;
}