help order by

I have a xml file ,and I want to sort like this:
first,order "ADVERT_BAND"
second,in each “ADVERT_TAPE” order "DAYPLAN_DATE"
and I want keep the hierarchy( structure)
the orignial xml file is:
- <ADVERT_INFO>
- <ADVERT_INFO_ROW num=“1”>
<ADVERT_BAND>band_A6</ADVERT_BAND>
- <ADVERT_TAPE>
- <ADVERT_TAPE_ROW num=“1”>
- <ADVERT_DAYPLAN>
- <ADVERT_DAYPLAN_ROW num=“1”>
<DAYPLAN_DATE>20040701</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“2”>
<DAYPLAN_DATE>20040501</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“3”>
<DAYPLAN_DATE>20040601</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
</ADVERT_DAYPLAN>
</ADVERT_TAPE_ROW>
- <ADVERT_TAPE_ROW num=“2”>
- <ADVERT_DAYPLAN>
- <ADVERT_DAYPLAN_ROW num=“1”>
<DAYPLAN_DATE>20040701</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“2”>
<DAYPLAN_DATE>20040501</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“3”>
<DAYPLAN_DATE>20040601</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
</ADVERT_DAYPLAN>
</ADVERT_TAPE_ROW>
- <ADVERT_TAPE_ROW num=“3”>
- <ADVERT_DAYPLAN>
- <ADVERT_DAYPLAN_ROW num=“1”>
<DAYPLAN_DATE>20040701</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“2”>
<DAYPLAN_DATE>20040501</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“3”>
<DAYPLAN_DATE>20040601</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
</ADVERT_DAYPLAN>
</ADVERT_TAPE_ROW>
</ADVERT_TAPE>
</ADVERT_INFO_ROW>
- <ADVERT_INFO_ROW num=“2”>
<ADVERT_BAND>band_A5</ADVERT_BAND>
- <ADVERT_TAPE>
- <ADVERT_TAPE_ROW num=“1”>
- <ADVERT_DAYPLAN>
- <ADVERT_DAYPLAN_ROW num=“1”>
<DAYPLAN_DATE>20040701</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“2”>
<DAYPLAN_DATE>20040501</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“3”>
<DAYPLAN_DATE>20040601</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
</ADVERT_DAYPLAN>
</ADVERT_TAPE_ROW>
- <ADVERT_TAPE_ROW num=“2”>
- <ADVERT_DAYPLAN>
- <ADVERT_DAYPLAN_ROW num=“1”>
<DAYPLAN_DATE>20040701</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“2”>
<DAYPLAN_DATE>20040501</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“3”>
<DAYPLAN_DATE>20040601</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
</ADVERT_DAYPLAN>
</ADVERT_TAPE_ROW>
- <ADVERT_TAPE_ROW num=“3”>
- <ADVERT_DAYPLAN>
- <ADVERT_DAYPLAN_ROW num=“1”>
<DAYPLAN_DATE>20040701</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“2”>
<DAYPLAN_DATE>20040501</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“3”>
<DAYPLAN_DATE>20040601</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
</ADVERT_DAYPLAN>
</ADVERT_TAPE_ROW>
</ADVERT_TAPE>
</ADVERT_INFO_ROW>
- <ADVERT_INFO_ROW num=“3”>
<ADVERT_BAND>band_A1</ADVERT_BAND>
- <ADVERT_TAPE>
- <ADVERT_TAPE_ROW num=“1”>
- <ADVERT_DAYPLAN>
- <ADVERT_DAYPLAN_ROW num=“1”>
<DAYPLAN_DATE>20040701</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“2”>
<DAYPLAN_DATE>20040501</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“3”>
<DAYPLAN_DATE>20040601</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
</ADVERT_DAYPLAN>
</ADVERT_TAPE_ROW>
- <ADVERT_TAPE_ROW num=“2”>
- <ADVERT_DAYPLAN>
- <ADVERT_DAYPLAN_ROW num=“1”>
<DAYPLAN_DATE>20040701</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“2”>
<DAYPLAN_DATE>20040501</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“3”>
<DAYPLAN_DATE>20040601</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
</ADVERT_DAYPLAN>
</ADVERT_TAPE_ROW>
- <ADVERT_TAPE_ROW num=“3”>
- <ADVERT_DAYPLAN>
- <ADVERT_DAYPLAN_ROW num=“1”>
<DAYPLAN_DATE>20040701</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“2”>
<DAYPLAN_DATE>20040501</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“3”>
<DAYPLAN_DATE>20040601</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
</ADVERT_DAYPLAN>
</ADVERT_TAPE_ROW>
</ADVERT_TAPE>
</ADVERT_INFO_ROW>
</ADVERT_INFO>

------------------
I want the output file like this:
- <ADVERT_INFO>
<ADVERT_INFO_ROW num=“3”>
<ADVERT_BAND>band_A1</ADVERT_BAND>
- <ADVERT_TAPE>
- <ADVERT_TAPE_ROW num=“1”>
- <ADVERT_DAYPLAN>
- <ADVERT_DAYPLAN_ROW num=“1”>

+ <ADVERT_DAYPLAN_ROW num=“2”>
<DAYPLAN_DATE>20040501</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“3”>
<DAYPLAN_DATE>20040601</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
<DAYPLAN_DATE>20040701</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
</ADVERT_DAYPLAN>
</ADVERT_TAPE_ROW>
- <ADVERT_TAPE_ROW num=“2”>
- <ADVERT_DAYPLAN>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“2”>
<DAYPLAN_DATE>20040501</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
- <ADVERT_DAYPLAN_ROW num=“3”>
<DAYPLAN_DATE>20040601</DAYPLAN_DATE>
</ADVERT_DAYPLAN_ROW>
<ADVERT_DAYPLAN_ROW num=“1”>
<DAYPLAN_DATE>20040701</DAYPLAN_DATE>
</ADVERT_DAYPLAN>
</ADVERT_TAPE_ROW>


</ADVERT_INFO>

how can I do in xquery?
thanks!

Hi,

the following query preserves the document but reorders the ADVERT_INFO_ROWs by
ADVERT_BAND and the ADVERT_DAYPLAN_ROWs by DAYPLAN_DATE:

let $info_rows :=
for $info_row in input()/ADVERT_INFO/ADVERT_INFO_ROW
return (let $tape_rows := $info_row/ADVERT_TAPE/ADVERT_TAPE_ROW
return <ADVERT_INFO_ROW num = “{ $info_row/@num }”>
{ $info_row/ADVERT_BAND }
<ADVERT_TAPE> {
for $tape_row in $tape_rows
let $dayplan_rows := $tape_row/ADVERT_DAYPLAN/ADVERT_DAYPLAN_ROW
return <ADVERT_TAPE_ROW num = “{ $tape_row/@num }”>
<ADVERT_DAYPLAN> {
$dayplan_rows sort by (DAYPLAN_DATE)
} </ADVERT_DAYPLAN>
</ADVERT_TAPE_ROW>
} </ADVERT_TAPE>
</ADVERT_INFO_ROW>)
sort by (ADVERT_BAND)
return <ADVERT_INFO> { $info_rows } </ADVERT_INFO>

Regards,
Juliane.

Hi Juliane
Thanks for your quick response.I think it can work well.And i implement this function the same way yestady.I think it is a little complex.And I should keep the structure manually.It is a nested query.And I think it will be more convience By adding deep sort and keep hierarchy fuction,just like this:for $some in input()//somerow order by $some//“the element you want to sort” deep keepHierarchy.I hope the w3c can add this fuction .Thank you very much again!