If no type is indicated, the type is string. <struct>s A value can also be of type <struct>. A <struct> contains <member>s and each <member> contains a <name> and a <value>. Here's an example of a two-element <struct>: <struct> <member> <name>lowerBound</name> <value><i4>18</i4></value> </member> <member> <name>upperBound</name> <value><i4>139</i4></value> </member> </struct> <struct>s can be recu