Hi,
It seems there is an error with the collection function. Something like this:
collection("directory")[5]
does not return anything in 9.0 but it does in 8.6.7
Best, Giuseppe
Universität Leipzig Institute of Computer Science, Digital Humanities Augustusplatz 10 04109 Leipzig Deutschland E-mail: celano@informatik.uni-leipzig.de E-mail: giuseppegacelano@gmail.com Web site 1: http://www.dh.uni-leipzig.de/wo/team/ Web site 2: https://sites.google.com/site/giuseppegacelano/