[chaley]

I'm not sure what you want to display. Do you want "Goodreads" or do you want "Goodreads:12345"?

Assuming you want to see "Goodreads:12345" as a link and that the text column has "Contains HTML" checked, this should work:

program:
	gr_id = select($identifiers, 'goodreads');
	if gr_id then
		gr_id = 'goodreads:' & gr_id;
		l = urls_from_identifiers(gr_id, '');
		l = re(l, '>goodreads<', '>' & capitalize(gr_id) & '<')
	else
		l = ''
	fi

If you don't want to see the actual ID then use this:

program:
	gr_id = select($identifiers, 'goodreads');
	urls_from_identifiers('goodreads:' & gr_id, '')