How to return SETOF RECORD?

Hello,

i'm writting some functions for parsing urls and handling strings. But i
have problems with the result set.

I already figured out how to return a single record/row. But i need
more. A good example for what i want is ts_debug();

cse=> SELECT alias, token from
ts_debug('http://www.postgresql.org/docs/index.html');
alias | token
----------+------------------------------------
protocol | http://
url | www.postgresql.org/docs/index.html
host | www.postgresql.org
url_path | /docs/index.html

I try to get an output like that:
cse=> SELECT alias, token from
parse_uri('http://www.postgresql.org/docs/index.html');
alias | token
----------+------------------------------------
scheme | http://
url | www.postgresql.org/docs/index.html
host | www.postgresql.org
path | /docs/
file | index.html

But i never get more than one row return. I need a hint how i can return
more than one row. Or even better: a littel example ;)

Thanks very much and greetings from Germany,
Torsten