QUOTE(flaleo @ May 22 2006, 06:15 AM)

Thanks for the replies - but I must have not been clear enough in my question.
I am only asking about the validity of the visa - it's clear that it's good for multiple entries and we have no interest in staying for greater than 90 days on a single entry.
My question is regarding the subsequent entries (second trip, fifth trip, tenth trip, etc.) well after her first trip, like 100 days after the first trip. My understanding is that after 90 days after her first etnry, the visa is no longer valid (it's only good for multiple entries within 90 days after first entry/use). In other words, she'll need a new visa every 90 days (if she travels every month let's say)?? Is that really true, and is it really true that there is no other type of tourist visa that remains valid for say a year or two years?
Thanks!
As the link I posted above states, the visa indicates the number of entries allowed (multiple in your case) as well as the maximum number of days allowed per entry (90 in your case). The 90 days do not indicate the length the visa is valid. Schengen visas, from what I understand, don't have set expiration dates if they are multiple entry (similar to multiple-entry B2-visas), but expire together with the passport.
Anything else would be silly and would severely increase the workloads at EU-consular posts around the world. If the issuing consulate wanted your wife to apply for a visa anytime she wanted to go to Europe, they would have given her a single-entry visa, which is the common procedure for visitors coming from and residing in less developed countries.