Hello All, I am following the link below to write an ARQ extension function,
https://blog.ldodds.com/2005/11/07/writing-an-arq-extension-function/ Please find the query i have given, PREFIX myfn: <java:samplejena.> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX dc: <http://purl.org/dc/elements/1.1/> PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> SELECT ?title ?r WHERE { ?s rdfs:seeAlso ?r. OPTIONAL {?r dc:title ?title.} FILTER ( isURI(?r) && myfn:LastModified(?r) > xsd:dateTime('2005-11-06T00:00:00Z') ) } And i execute the following command to run the query for the dataset, /home/ak/Downloads/apache-jena-3.8.0/bin/arq --data /home/ak/Desktop/dataset.rdf --query /home/ak/Desktop/query.rq I am getting the error as, *ak@akrish12:~$* /home/ak/Downloads/apache-jena-3.8.0/bin/arq --data /home/ak/Desktop/dataset.rdf --query /home/ak/Desktop/query.rq 14:07:07 WARN ClsLoader :: Class not found: samplejena.LastModified 14:07:07 WARN exec :: URI <java:samplejena.LastModified> has no registered function factory ------------- | title | r | ============= ------------- I have added the classpath in the location /home/ak/Documents and the jar of the file LastModified in the same location. Could someone please help me to resolve this issue. Regards, Arun