Hello, I've noticed that adding a `FILTER` based on a `xsd:date` (not `xsd:dateTime`) property increases dramatically the execution time of the SPARQL query and in a few instances I'm not even able to complete it (it times out after 60 secs). It's not a huge dataset: without the filter, the same query returns approx 11,000 rows in about 6-7 seconds.
I've googled this problem and some say it's an issue linked to the fact that SPARQL 1.1 only (natively?) deals with xsd:dateTime and not with xsd:date, which then has to be converted. Can you confirm this? Should I recode all the properties to xsd:dateTime? Thanks. Francesco m: +61 416 860 221 e: m...@francescobailo.net