SDB/Support

From Jena Wiki

Variations in the setups of databases make it hard to diagnose problems by email without precise and detailed information.

Questions should be sent to: <mailto:jena-dev@groups.yahoo.com>

Include a description of the database setup, version numbers of all software and the database.

A complete, minimal example should be included.

Complete means sufficient information, to exactly recreate the situation.

Minimal means no more data than is needed to demonstrate the situation. Large data files are not minimal; it is very rare that the problem can not be illustrated with less than 10 triples. Queries should be as the parser sees them, not as Java strings.

Use the command line tools to produce the complete minimal example.

If a query gives the unexpected results, include some data; the query, stripped to the non-performing part; and a description of the expected results. You should compare the results by running ARQ's reference query engine first.

arq.sparql --engine=ref --data=datafile --query=queryfile