Registry in RSS

[Alasdair Allan]

Roy Williams wrote:
> For example, each VOEvent has a position in the sky, and tools are  
> there to correlate, display, and reason about that position. Setting  
> the position to 999,999 or some other rubbish would confuse the  
> users of such tools and make think VOEvent is wrong.

Just to pick up on that, the <WhereWhen /> block is entirely optional,  
a VOEvent doesn't necessarily have to have a position in the sky.

Al.