Bug 117149 Add additional datapoint markers
I would like to propose adding additional datapoint markers. Attached is a set of markers I would like supported.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/util/LiteralHelper.java
TickStyle.LEFT_LITERAL.getName( ),
				TickStyle.RIGHT_LITERAL.getName( )
		} );
	}
	/**
	 * @return
	 */
	private static NameSet getHorizontalTickStyleSet( )
	{
		String prefix = "TickStyle."; 
		String suffix = ".displayName"; 
		return new NameSet( prefix, suffix, new String[]{
				TickStyle.ACROSS_LITERAL.getName( ),
				TickStyle.ABOVE_LITERAL.getName( ),
				TickStyle.BELOW_LITERAL.getName( )
		} );
	}
	/**
	 * @return
	 */
	private static NameSet getFullTickStyleSet( )
	{
		String prefix = "TickStyle."; 
		String suffix = ".displayName"; 
		return new NameSet( prefix,
				suffix,
				toStringNameArray( TickStyle.VALUES ) );
	}
	/**
	 * @return