Grouping help in XSLT !!!

[killerkoolkris]

Hi,
I am a newbie to XML / XSLT.

I am currently facing a problem. Below is the prototype of a XML i am using.
<xml>
<row>
<field1>1</field1>
<field2>1</field2>
<field3>1</field3>
<field4></field4>
</row>
<row>
<field1>1</field1>
<field2>1</field2>
<field3>2</field3>
<field4>1</field4>
</row>
<row>
<field1>1</field1>
<field2>1</field2>
<field3>2</field3>
<field4>2</field4>
</row>
<row>
<field1>1</field1>
<field2>1</field2>
<field3>2</field3>
<field4>3</field4>
</row>
<row>
<field1>1</field1>
<field2>2</field2>
<field3>4</field3>
<field4>1</field4>
</row>
<row>
<field1>1</field1>
<field2>2</field2>
<field3>4</field3>
<field4>2</field4>
</row>
<row>
<field1>1</field1>
<field2>2</field2>
<field3>4</field3>
<field4>3</field4>
</row>
</xml>

and the there can be any number of combinations for the field values.

The required output will be somewhat like this ....

field1 : 1
field2 : 1
field3 : 1
field3 : 2
field4 : 1
field4 : 2
field4 : 3
field2 : 2
field3 : 4
field4 : 1
field4 : 2
field4 : 3


Basically it means that i just have to take a unique combination and ignore if the value repeats.

It will be very helpful if someone can help me out
with this. I have already tried a lot of combinations but the limited ability of the <xsl:variable> is proving a big hurdle.

I hope the inputs are good and so is the problem.

Regds,
KKK ;-)