ODSI xquery types

Question

Hi Mike,
I used to develop in ALDSP 2.5 but I am now on the new platform 10gR3 and I noticed with the new platform the type item() is no longer supported. I didn't use it much in 2.5 but there were a couple cases where it made sense. I did find that instead of item() I can use element() which seems to have the same effect as item() did in 2.5. I tried searching and could not find information about the supported ODSI xquery types. Is there a document that lists all the supported ODSI xquery types?
Mike

Answer 1

Thanks for the link, I have read through that before and I was looking for something more than RDBMS xquery mappings. Anyway here is my example:
In ALDSP 2.5 sequence $input was defined as item() but when converted to ODSI an error gets triggered "type item() not supported". So I switched item() with element() and it seems to work fine. The reason I want to do this is because I have multiple version of a service running and getItemsV1 and getItemsV2 return the same shape but have different rules applied to them. I can't get rid of V1 because of consumer dependencies and I don't want to duplicate data services or functions that are typically doing the same thing. I rarely use element() as an input parameter but do you see any issue with this down the line?
declare function tns:dummyFunction($input as element()) as element(ns:foo)* {
     let $items:=
                              typeswitch($input)
                                   case $request as element(ns1:bar) return
                                             ns11:getItemsV1($request)
                                   case $request as element(ns2:baz) return
                                             ns22:getItemsV2($request)
                                   default return
return ns3:doSomethingWithItemsFromEitherV1orV2($items)
};