Generate xml element from Union of 2 Select queries

Do you know ho I can get the union result of 2 queries and put them in xml result, but I want each query to be in seperate xml element.
I don t want to put 1 single xmlelement and do a From then construct a virtual table uniting the 2 subqueries
I mean I don t want something like the following:
(Select
XMLAGG(
XMLELEMENT("credit",
XMLForest(field1 "detail")
FROM
--SubQuery1
Select field1 from myTable1
union
--SubQuery1
Select field1 from myTable2
) "credits"
I want something like here:
XMLELEMENT("credits",
(SELECT
XMLAGG(
XMLELEMENT("credit",
XMLForest(field1 "field1")
FROM
myTable1
(SELECT
XMLAGG(
XMLELEMENT("credit",
XMLForest(field1 "field1")
FROM
myTable2
Except the 2nd alternative is not working Sad
I get error message:
"SQL command not properly ended"
Thanks a lot

try
SELECT XMLElement("file",
                  XMLForest( -- File details
                            FILETABLE.ID_FILE "fileNumber",
                            FILETABLE.ID_PRET_CLT "loanID"), -- new
                            -- Debits are pulled from both myTable1 and myTable2 tables
                            -- First: fetching debits from myTable1 table
                            (Select XMLELEMENT("debits",
                                               (SELECT XMLAGG(XMLELEMENT("debit",
                                                                         XMLELEMENT("referenceNumber",
                                                                                    NUM_REFERENCE)))
                                                  FROM myTable1
                                                 Where ID_FILE =
                                                       FILETABLE.ID_FILE),
                                               -- Second: fetching debits from myTable2 table
                                               (SELECT XMLAGG(XMLELEMENT("debit",
                                                                         XMLELEMENT("referenceNumber",
                                                                                    NUM_REFERENCE)))
                                                  FROM myTable2
                                                 Where ID_FILE =
                                                       FILETABLE.ID_FILE))
                               from dual) /*as XXXX)*/) xml
FROM FILETABLE

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