=String-Variant=
<tt>Bindings.STR_VARIANT</tt> is a binding that represents any datatype as string.
;String-Variant encoding notation
:S<string>       String type (without parameters)
::                    Control characters " : < > | ? * \ / % # [0..31] [128..] are escaped as %<hex><hex>
::                   " "-space is _
:I<integer>      Integer type (without parameters)
:L<long>         Long type (without parameters)
:B<base64>       All other cases. The string is Base64 encoding of a binary encoded variant. 
::                   Base64 encoding has url and filename safe options enabled.