Bug 124067 When select the XML file, the relative path should be supported.
Description: When select the XML file, the relative path should be supported. Step to reproduce: 1. new a report 2. new a datasource and dataset based on a XML file 3. select the XML file, the file relative path should be used. Actual result: only the absolute path is supported. Expect result: the relative and absolute path are supported.
data/org.eclipse.birt.report.data.oda.xml/src/org/eclipse/birt/report/data/oda/xml/util/ui/SchemaPopulationUtil.java
childNode.addChild(n.getChildren());
					}
				}
				node.addChild(childNode);
			}
		}
		if(!includeAttribute)
			return;
		XSAttributeGroupDecl group = complexType.getAttrGrp( );
		if ( group != null )
		{
			XSObjectList list = group.getAttributeUses( );
			for ( int j = 0; j < list.getLength( ); j++ )
			{
				ATreeNode childNode = new ATreeNode( );
				childNode.setValue( ( (XSAttributeUseImpl) list.item( j ) ).getAttrDeclaration( )
						.getName( ) );
				childNode.setType( ATreeNode.ATTRIBUTE_TYPE );
				node.addChild( childNode );
			}
		}
	}
	/**
	 * Return the tree node instance that represents to the ComplexElement that featured by the given value.
	 * 
	 * @param root the tree node from which the search begin
	 * @param value the name of the ComplexElement
	 * @return
	 */
	private static ATreeNode findComplexElement( ATreeNode root, String value )