Graph Templates: DataSource Templates & Stacked Graphs

[vector]

I'm using different templates to graph stacked qos entries using cacti.

It would be VERY useful to be able to select something:
dsClass0 = ds1source
dsClass1 = ds2source
dsClass2 = NONE
dsClass3 = NONE

This is possible, but as legends are used too, ds = NONE condition should be checked so that all items related to the "NULL DS" should not be added to rrdtool graph string.

WORKAROUND: A CDEF function multipling values from a random source to 0, but this is not what I had in mind. The above solution is what is expected when NONE is selected in the dropdown box.

Thanks