Format parameter not working

stardog query myDB "select * where { ?s ?p ?o } limit 2" --format RDF/XML

Results in:

'RDF/XML' is not a valid RDF format identifier. Acceptable format strings are SPARQL, JSON, TEXT, TABLE, CSV, TSV, HTML.

How do I save the query result in any of the RDF formats?

My bad. It has to be Construct query to work.