Large Text Fields and TOAST

hi,

I an using postgresql-7.1beta4 and am trying to use the large text fields.

I have heard of TOAST. There is little documentation.

I found one section about creating a data type,

then creating two functions to convert the data types.

Is this how TOAST is implemented?

Am I on the right track?. If so, what do

the conversion functions look like. I am using plpgsql.

Thanks, Lee