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  Subject: help me implement the following in xslt
Author: saffrons saffrons
Date: 12 Sep 2005 04:38 AM
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This is my requirement,
the input xml will be in this format,
<root>
<name>1</name>
<name>2</name>
<name>3</name>
<name>1</name>
<name>2</name>
<name>1</name>
</root>
The possible values for name are only 1,2 and 3. I should supply an xsl which will be used to transform this xml into another xml in the following format,
<root>
<Loop>
<name>1</name>
<Loop>
<name>2</name>
<Loop>
<name>3</name>
</Loop>
</Loop>
</Loop>
<Loop>
<name>1</name>
<Loop>
<name>2<name>
</Loop>
</Loop>
<Loop>
<name>1</name>
</Loop>
</root>
In the input xml, there will not be a 2 without 1 preceding it. similarly there wont be a 3 without a 2 preceding it. But there could be more than one 2, one after the other. Here's another example,
<root>
<name>1</name>
<name>2</name>
<name>2</name>
</root>
Here the output will be
<root>
<Loop>
<name>1</name>
<Loop>
<name>2</name>
</Loop>
<Loop>
<name>2</name>
</Loop>
</Loop>
</root>
I thought of using the following algorithm to determine when to open a loop element and when to close a loop,
declare variables L1 = no, L2 = no and L3 = no
For each <root> in output xml
{
If (name = 1)
{
If (L3 = yes) then in output xml, close loop "</Loop>"
If (L2 = yes) then in output xml, close loop "</Loop>"
If (L1 = yes) then in output xml, close loop "</Loop>"
Open Loop in output xml "<Loop>"
}
If (name = 2)
{
If (L3 = yes) then in output xml, close loop "</Loop>"
If (L2 = yes) then in output xml, close loop "</Loop>"
Open Loop in output xml "<Loop>"
}
If (name = 3)
{
If (L3 = yes) then in output xml, close loop "</Loop>"
Open Loop in output xml "<Loop>"
}
}
But here, since variable values once assigned cannot be reassigned, I am not able to implement this algo. in xsl. Help me with some other logic that will be able to achieve the same. (all I want here is to do the following, there will be an input xml file where all elements are in the same level. In the output file, I want these elements nested one inside another, based on their values.)
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