Hostname Unique name used to identify the API, specific to each client/customer.

Language String indicating the language in which to return the resource. Default is set to US English: en-us. Click here for all available language codes.

Location key Unique ID that can be used to search for a specific location. This can be retrieved by using the Locations API.

Metric Integer used to display data in Imperial (0) or Metric (1) units in the output. Default is 0 -> Imperial units.

XmlVersion Version of the XML that is returned from the service.