Bug 179674 Support time dimension in model
When define time dimension in model, the "itTime" property will be set. However this is not enough. We also need to know to what precision the time value should be evaluated, say, year, month, day, etc. Model needs to be enhanced to support such requirement.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/ModuleWriter.java
String xml = propDefn.getXmlValue( getModule( ), value );
		if ( xml == null )
			return;
		if ( propDefn.isEncryptable( ) )
		{
			IEncryptionHelper helper = MetaDataDictionary.getInstance( )
					.getEncryptionHelper( );
			xml = helper.encrypt( xml );
		}
		if ( tag == null )
			tag = ModelUtil.getTagByPropertyType( propDefn );
		if ( propDefn.getTypeCode( ) == IPropertyType.SCRIPT_TYPE )
			cdata = true;
		writeEntry( tag, propDefn.getName( ), xml, cdata );
	}
	/**
	 * Writes the structure memeber.
	 * 
	 * @param struct
	 *            the structure
	 * @param tag
	 *            the tag to write
	 * @param memberName
	 *            the member name
	 * @param cdata
	 *            whether the value should be written as CDATA
	 * @param withoutName
	 *            whether the property name should be written
	 */
	protected void writeProperty( IStructure struct, String tag,