Case 1 – Keep the discontinued series and add more recent data

Let’s start with the standard version: Join(series1, series2). 

This function will join 'series1' and 'series2', in our case innaac1015 and innaac0109. The junction will be done at the end of series1. 

Here’s how it will look on a chart: 

To the see exact construction of the document, you can download the file here.