* '''Variables''':<br/>All query parameters prefixed with a dollar sign (<code>$</code>) will be treated as external variables. The parameter name and value will be bound to the query before it is evaluated.
* '''[[Serialization]]''':<br/>All serialization parameters known to BaseX can be specified as query parameters. Parameters that are specified within a query will be interpreted by the REST server before the output is generated.
* <code>inputcontext</code>:<br/>May be used to provide an initial context node.
* <code>wrap</code>:<br/>Wraps the results in XML elements (default: <code>no</code>).