I am following the SPIN Getting started tutorial on TBC ME. I am trying to add this constraint
# an invoice with no paidDate is > 90 days old ASK WHERE { ?this :invoiceDate ?invoiceDate . OPTIONAL { ?this purchases:paidDate ?paidDate . } . FILTER ((!bound(?paidDate)) && (spif:duration("d", ?invoiceDate, afn:now()) > 90)) . } I get the warning below, though I have imported spinf.ttl WARN [Thread-78] (E_Function.java:89) - URI <http://spinrdf.org/spif#duration> has no registered function factory What am I missing? Thanks, Monika -- -- You received this message because you are subscribed to the Google Group "TopBraid Suite Users", the topics of which include Enterprise Vocabulary Network (EVN), TopBraid Composer, TopBraid Live, TopBraid Insight, SPARQLMotion, SPARQL Web Pages and SPIN. To post to this group, send email to topbraid-users@googlegroups.com To unsubscribe from this group, send email to topbraid-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/topbraid-users?hl=en --- You received this message because you are subscribed to the Google Groups "TopBraid Suite Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to topbraid-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.