[redscarlett]

Originally Posted by chaley

Taking a guess, the template would look something like

program: 
	c = field('#category');
	template1 = template('{#category}/{#sub_category}/{series}/{title}{series_index:0>4.1f}{authors}'), '');
	template2 = template('{#genre}/{#sub_genre}/{series}/{title}{series_index:0>4.1f}{authors}');
	first_non_empty(
		strcmp(c, 'Tort Law', '',  template1, ''),
		strcmp(c, "some other post grad category", '', template1, ''),
		template2
	)

The first template would be chosen if the category equals "Tort Law" or "some other post grad category". You would put a line into the template for each possible post-grad category.

For all the templates, if a value does not exist, it is replaced with nothing. This could leave two slashes adjacent to one another, which will be replaced by the template processor with one slash. Thus, when using template two when there isn't a series, without you doing anything the template effectively becomes

template('{#genre}/{#sub_genre}/title}{authors}');

Best I can do with the information I have.

Thank you!! That's brilliant