you are answering half of what I wrote...
When I want to include the url, I have the followinng appearing, how am I supposed to make it work?
{% set field = attribute( post, 'publisher-url' ) %}
{{ field }}
if I put
{% set field = attribute( post, 'publisher-url' ) %}
{{ post.publisher-url }} tried also {{ publisher-url }}
it returns 0...