[xsl] insert an attribute value through xsl

["=?big5?B?qkwgpGyq5A==?=" <minikittygo at hotmail dot com>]

Hi there
I have a question about adding an extra id tag through xsl there how... 
suppose i have a xml file with such structure: -

<Family>
<name>Smith</name>
<parents>
<father>John</father>
<mother>Mary</mother>
</parents>
<child>Jane</child>
</Family>

<Family>
<name>Snow</name>
<parents>
<father>Geroge</father>
<mother>Sue</mother>
</parents>
<child>Liz</child>
<child>Paul</child>
</Family>

etc....

now i wish to transform such data in a table in HTML, however, i would like 
to 
add an extra piece of information; an id number for each no (i.e.
--------------------------------------------------------
familyno | Family name	| Parents	         | Children	|
--------------------------------------------------------
1	|Smith		|John, Mary	|Jane		|	
---------------------------------------------------------
2	|Snow		|Geogre, Sue	|Liz, Paul	|	
)

how am i suppose to add an id on each family through xsl? do i have to go 
through
a "double process" (e.g. adding an id attribute in the family tag, then 
convert) or is there a single step to do so? 
thanks for your time

Regards
Kit


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