Tag formats: Can't we all just get along?

Lack of standardization with new technologies such as tagging ...

"First, there was tagging with spaces between keywords and all seemed good:

del.icio.us Tagging.

But there are some problems with this method. What about compound phrases? What if I want to tag something “white house” instead of with the separate tags “white” and “house” (which changes the meaning) or “whitehouse”/”white+house” (unintuitive)? Enter comma delimited tagging.

Yahoo Tagging.

When you’ve got a new technology, inconsistency is to be expected. Will all these different formats still be around a year from now or will a standard emerge?"   continued ...   (Via Signal vs. Noise)