How to return multiple tags (based on different checks) in a for loop?

Question

Hi,
I'm trying to return multiple elements, based on different checks that are done in the XQuery, within a for loop. But I'm getting syntax errors at any attempt to do this.
This is the structure of what I'm trying to do:
          <ActionList>
     <ACtion>
let $total := count(...)
for $x in (1 to $total)
     let $lineItems := $someVariable/*:Items/*:Item[$x]
     return
          if(...)
                    <Qty1>{...}</Qty1>
                         else     ""
                    if(...)
                    <Qty2>{...}</Qty2>
                         else ""
               {                                       if(...)
          <Qty3>{...}</Qty3>
                         else ""
          <LinesList>
                         let $totalcount(...)
                         for $y in (1 to $totalcount(...)
                              let $DTL := $someVariable*:DTL[$y]
                         return
                         <Line>
                              <Carrier>{...}</Carrier>
                              <Path>{...}</Path>
                              <CA>{
                                   if(...)
                                        data($$someVariable/*:CA)
                                   else
                              }</CA>
                              <RE>{
                                   if(...)
                                        data($someVariable*:CA[@XX="RG"])
                                   else
                              }</RE>
                              <Time>{
                                   if(...)
                                        data($someVariable*:CA[@XX="BN"])
                                   else
                                                                 </Time>
                              </Line>
                    </LinesList>
                                             </ACtion>
                                             </ActionList>
I'm not able to return elements without having their father being returned as well, I just want to iterate over those fields and, based on that verification, decide whether they should be returned or not.
Can someone please advise?

Answer 1

An example anyway...
Input document ($d) :
<ns0:Items xmlns:ns0="http://my.company.org/my-namespace">
  <ns0:Item type="A">
    <ns0:Qty>2</ns0:Qty>
    <ns0:UnitPrice>10.00</ns0:UnitPrice>
    <ns0:DTL>
      <ns0:Article>ART001</ns0:Article>
      <ns0:DispatchDate>2012-01-20</ns0:DispatchDate>
      <ns0:Destination direct="1">Location1</ns0:Destination>
    </ns0:DTL>
    <ns0:DTL>
      <ns0:Article>ART002</ns0:Article>
      <ns0:DispatchDate>2012-01-21</ns0:DispatchDate>
      <ns0:Destination direct="1">Location2</ns0:Destination>
    </ns0:DTL>
  </ns0:Item>
  <ns0:Item type="B">
    <ns0:Mass>5</ns0:Mass>
    <ns0:Unit>kg</ns0:Unit>
    <ns0:DTL>
      <ns0:Article>ART003</ns0:Article>
      <ns0:DispatchDate>2012-01-20</ns0:DispatchDate>
      <ns0:Destination direct="1">Location3</ns0:Destination>
    </ns0:DTL>
    <ns0:DTL>
      <ns0:Article>ART004</ns0:Article>
      <ns0:DispatchDate>2012-01-21</ns0:DispatchDate>
      <ns0:Destination direct="1">Location4</ns0:Destination>
    </ns0:DTL>
    <ns0:DTL>
      <ns0:Article>ART005</ns0:Article>
      <ns0:DispatchDate>2012-01-22</ns0:DispatchDate>
      <ns0:Destination direct="2">Location5</ns0:Destination>
    </ns0:DTL>
  </ns0:Item>
</ns0:Items>XQuery :
declare namespace ns0 = "http://my.company.org/my-namespace";
<DispatchInfo>
  for $i in $d/ns0:Items/ns0:Item
  return
  <Parcel>
    if ($i/@type = "A")
      then <Amount>{xs:decimal($i/ns0:Qty * $i/ns0:UnitPrice)}</Amount>
      else <Weight>{concat($i/ns0:Mass, " ", $i/ns0:Unit)}</Weight>
  , for $j in $i/ns0:DTL
    return
    <Article>
      <Num>{data($j/ns0:Article)}</Num>
    , <Dt>{data($j/ns0:DispatchDate)}</Dt>
    , if ($j/ns0:Destination/@direct = "1")
        then <Dest>{data($j/ns0:Destination)}</Dest>
        else ()
    </Article>                 
  </Parcel>
</DispatchInfo>Output :
<DispatchInfo>
  <Parcel>
    <Amount>20</Amount>
    <Article>
      <Num>ART001</Num>
      <Dt>2012-01-20</Dt>
      <Dest>Location1</Dest>
    </Article>
    <Article>
      <Num>ART002</Num>
      <Dt>2012-01-21</Dt>
      <Dest>Location2</Dest>
    </Article>
  </Parcel>
  <Parcel>
    <Weight>5 kg</Weight>
    <Article>
      <Num>ART003</Num>
      <Dt>2012-01-20</Dt>
      <Dest>Location3</Dest>
    </Article>
    <Article>
      <Num>ART004</Num>
      <Dt>2012-01-21</Dt>
      <Dest>Location4</Dest>
    </Article>
    <Article>
      <Num>ART005</Num>
      <Dt>2012-01-22</Dt>
    </Article>
  </Parcel>
</DispatchInfo>