Page recognised by Google Alert but not cached

Different crawler involved?

[Niall Kennedy]

I have a Google Alert set up to inform me of instances of a page including a key phrase being found by Google. This morning I received such an alert but on checking for a cached version of the page, found none.

I assumed that when a page was indexed by G it was automatically cached, and a G Alert would be generated.

Similarly I assumed that a G Alert indicated an indexed page.

Can anyone with a greater understanding explain the processes?

Thanks

Niall

[Niall Kennedy]

Anyone?