Descriptive Set Theory

[daddycaylor]

I've been looking a little into what there is on-line about descriptive 
set theory, a relatively new field.
It seems that with the questions about cardinality and descriptions on 
this list, that descriptive set theory (Polish spaces being an 
important element) would be useful, if not essential.
A search of this list doesn't turn up any references to it.  Does 
anyone have enough knowledge of it to give a brief note on how it ties 
in with this list's discussion?

Tom Caylor