string parameter value without <string></string> tags is legal in xmlrpc:
Scalar <value>s
<value>s can be scalars, type is indicated by nesting the value inside one of the tags listed in this table:
Tag Type Example <i4> or <int> four-byte signed integer -12 <boolean> 0 (false) or 1 (true) 1 <string> string hello world <double> double-precision signed floating point number -12.214 <dateTime.iso8601> date/time 19980717T14:08:55 <base64> base64-encoded binary eW91IGNhbid0IHJlYWQgdGhpcyE=
If no type is indicated, the type is string.
-- juha