Generates a SPARQL command to update a database with the information stored in resource.
The namespaces object is used to expand any compact URI values. In most cases you should pass the one returned by [
method@SparqlConnection.get_namespace_manager] from the connection that is the intended recipient of this data.
| this |
a `TrackerResource` |
| namespaces |
a set of prefixed URLs, or null to use the Nepomuk set |
| graph_id |
the URN of the graph the data should be added to, or null |
|
a newly-allocated string containing a SPARQL update command. |