What are the differences between a DEFAULT time dimension and another time dimension ? Is it just like for the default measure, i.e. used if no measure is mentionned in a MDX?
Can we do exactly the same things with a non-default time dimension ?
I'm thinking about Evolutions, running sums, avg, dtXXX functions, ytd function.
The DEFAULT time dimension is the one that is going to be used in custom rollup aggregation (www) when you do not define any hierarchy and a few MDX time functions when no hierarchy is defined (Ytd, Qtd, Mtd, Wtd ...).
Apart from that there is no difference with a regular time dimension.