Re: To find out immediate following tag

XSLT has no access to the tags in the document (they are resolved by
the XML parser and not reported) but to check if the following element
is an a1 you'd do following-sibling::*[1][self::a1] although in xslt2
it's usually better to use for-each-group to do the merging rather than
looking along the sibling axis, something like

for-each-group select="*" group-adjacent="self::a1"

David

________________________________________________________________________
The Numerical Algorithms Group Ltd is a company registered in England
and Wales with company number 1249803. The registered office is:
Wilkinson House, Jordan Hill Road, Oxford OX2 8DR, United Kingdom.

This e-mail has been scanned for all viruses by Star. The service is
powered by MessageLabs. 
________________________________________________________________________