xsl structuring....

["Saif Khaja" <ksaif25@xxxxxxxxxxx>]

Hi everyone,
I am having a structuring problem with displaying the xml file in the format 
I want. Even though I think it must be a common one cause I came accross 
similar kind of structuring many times, but this time it is in XSL.

I have an XML file in this format.

<History>
 <des>
    <desRow>
       <name>n1</name>
       <qty>10</qty>
    </desRow>
    <desRow>
       <name>n2</name>
       <qty>11</qty>
    </desRow>
    <desRow>
       <name>n3</name>
       <qty>12</qty>
    </desRow>
    <desRow>
       <name>n6</name>
       <qty>14</qty>
    </desRow>
    <desRow>
       <name>n7</name>
       <qty>15</qty>
    </desRow>
  </des>

 <asis>
    <asRow>
       <name>n1</name>
       <qty>20</qty>
    </asRow>
    <asRow>
       <name>n2</name>
       <qty>21</qty>
    </asRow>
    <asRow>
       <name>n3</name>
       <qty>22</qty>
    </asRow>
    <asRow>
       <name>n9</name>
       <qty>30</qty>
    </asRow>
  </asis>
</History>
/* ********************************************** */

Now my problem is to display it in the following format.

Name        desQty         asisQty
n1          10             20
n2          11             21
n3          12             22
n6          14             -
n7          15             -
n9          -              30

To achieve this, using the traditional sequential programming approach, I do 
the following. (Still hard to think in terms of structured - recursive 
approach.) :)

<xsl:for-each select="des/desRow"
 <xsl:variable name="desName" select="name"/>
 <TR><TD><xsl:value-of select="name"/></TD>
             <TD<xsl:value-of select="qty"/></TD>
 <xsl:for-each select="asis/asRow"
    <xsl:if test="$desName = name">
        <TD><xsl:value-of select="qty"/></TD>
    </xsl:if>
 </xsl:for-each> </TR>
</xsl:for-each>

This <xsl:for-each> block will get all the common elements and new elements 
in "des".
And I am unable to think of a way to get the new elements in "asis". To get 
this if I write another FOR loop, with "asis" as outer loop, still I will 
have no way to determine that a match has been made and that it is a new 
element. How much I wish XSL had (actual)variables even though it has one. I 
would have used a flag and set it to true if a match was made and it would 
have solved my problem.

To get around this problem, I was thinking of another dumb way.
Is there any way you can change the XML from XSL?????????????
I was thinking of having a flag attribute for each "Row" and set it to true 
if a match has been made. But then I know it is not right as you are 
changing content for display.

Please, any suggestions towards this from the XSL gurus will be greatly 
appreciated.

Thanx,
-Saif.
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