Hi, While creating a R-package, based on my R client-implementation, I found that the binding function was malfunctioning. After rewriting that function, the following is accepted: query_txt <- "declare variable $name external; for $i in 1 to 5 return element { $name } { $i }" query_obj_1 <- Query(Sess, query_txt) success <- query_obj_1$queryObject$Bind("name", "number") print(query_obj_1$queryObject$ExecuteQuery()) results in: "<number>1</number>" "<number>2</number>" "<number>3</number>" "<number>4</number>" "<number>5</number>" When I change the line 'success <- query_obj_1$queryObject$Bind("name", "number")' in success <- query_obj_1$queryObject$Bind("name", "number", "xs:integer") the following error is produced: "[XPST0081] No namespace declared for '\002xs:integer'." What types are accepted? Ben