[TYPO3] Using subtitle in template

[Edwin Blokker]

Hello,

I want to use the pages subtitle as a text in my template. I use this 
typoscript:

# subtitle
lib.sub = TEXT
lib.sub {
value = domain.com
value.override.field = subtitle
value.wrap = domain.com: |
}

And have tried many variations on this one, but none of them show any 
result. What am I doing wrong?

BTW, I'm new to typoscript, I hope questions like this are appropriate 
on this list. I could not find a special 'newbie list'.

Thanks in advance,
Edwin.