Serialiser options array

[Frederic P1370WSK1]

So, the docs state that when using:

$graph->serialise('rdfxml') you can use an optional second argument array $options that hold serialiser specific options. So that becomes:

$graph->serialise('rdfxml', $options= array());

So, what are these options then? The documentation seems to be rather limited in explainining the key/values that $options can hold - or at least I can't seem to find them. My goal is to change the name of the generated RDF file to a server-controlled string based on the client's request for the rdfxml serializer.

I'm thinking it would be something like this, but without knowing the key to use I can't seem to trigger any change:

$graph->serialise('rdfxml', $options= array('name'=>'rf'.$data_id.'.rdf'));

where $data_id would be the identifier of the URI; so for object 100; the name of the file would be:

rf100.rdf in stead of the automatically generated download.rdf

documentation source: http://www.easyrdf.org/docs/api/EasyRdf_Serialiser.html