display.multiTag

[mccormw]

I have searched for multiTag in the forum and read through the posts but I cannot get it to work for the Genre tag.
With Twonky if I use the following Genre Tag: Rock,Rock Country,Rock Psychedelic,Rock West Coast
for the Grateful Dead (hi all deadheads), then I get the album appearing under Rock, Rock Country, Rock Psychedelic & Rock West Coast and NOT the full entry. That is what I understand as multiTag but of course it might not be.
Does that make sense?

Now MinimServer has vastly better search facilities and I do mean vastly better than Twocky, there is simply no comparison. But it doesn't do this trick that Twonky does with multiple tags.

Twonky is OK for non-classical fans but apart from being a deadhead I am also a big classical fan - about 70% of my digital and LP collection is classical and Twonky is just about hopeless for classical collections.
Minim, though is perfect for classical fans with its 'Intelligent Browsing' facility and to be honest the multiple items in the Genre tag is not that much of an issue, certainly not as much as it is in Twonky where it is vital because the rest is so awful!
Now in the Index Tags field I changed Genre to Genre.display.multiTag but it doesn't work. Genre just disappears from the search fields in the NAIM n-Stream app.

So where should I put it? Is a comma the default separator?

Simon I have to say that I love Minim, it is a brilliant piece of work and I have been studying a few music servers, so I do know the field. I will carry on using Twonky (probably) for pictures via my WD Live Hub but not for music through my NAIM any more.