# Metaproxy XML config file schema namespace mp = "http://indexdata.com/metaproxy" filter_virt_db = attribute type { "virt_db" }, attribute id { xsd:NCName }?, attribute name { xsd:NCName }?, element mp:pass-vhosts { xsd:boolean }?, element mp:virtual { attribute route { xsd:NCName }?, element mp:database { xsd:string }, element mp:target { xsd:string }+ }*