Adding attributes to elements in WSDL

Hello XML gurus

When creating a webservice in LotusScript with a user-defined class a public variable of type string is transformed to an XML element.

LotusScript:

Class PremiumRequest

Public Registration_Date As String

Public Price_Accessories As Single

End Class

XML:

how is it possible to append any instructions like format=“mm.yyyy” to the XML element. What I would like to have should look like:

Any ideas? Thank you for your help.

Bodo