[kacir]

I really like the template language and conditional fields.

You might consider adding another example to the documentation

{author_sort}/{series}/{series}{series_index:0>3s|[|] - }{title} - {authors}

so the result would be

Asimov, Isaac/Foundation series/Foundation series[001] - The Foundation - Isaac Asimov

This example demonstrates that you can use conditional prefix, suffix with formatting of the series number
I was trying to test how some ... aehm ... not-very-obvious ... combinations in Templates work ;-)


Also, there seems to be a typo in documentation

If a particular book does not have a particular piece of metadata, the field in the template is automatically removed for that book. Consider, for example:

{author_sort}/{series}/{title} {series_index}

If a book has a series, the template will produce:

{Asimov, Isaac}/Foundation/Second Foundation - 3

and if a book does not have a series:

{Asimov, Isaac}/Second Foundation

(calibre automatically removes multiple slashes and leading or trailing spaces).

- extra {} around author in the result
- extra space dash space ' - ' in the result between 'Second foundation' and series number.