There may be more than one prefix bound to a given namespace URI, but

name(namespace::*[.=$uri][1])

will give you the first one.

Alternatively use substring-before(name(.), ':')

Michael Kay 

# -----Original Message-----
# From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
# [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of Munna D
# Sent: 19 March 2004 12:42
# To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
# Subject:  getting the namespace prefix
# 
# Hi,
# I know we can get the local name of an element with the 
# local-name() function, and the namespace-uri with the 
# namespace-uri() function, however, given the namespace uri, 
# is there a way I could find out the namespace prefix used for 
# a particular element? ie, say I know that the namespace uri 
# for a particular element or set of elements is 
# "http://purl.org/atom/ns#", is there a way to pick up the 
# namespace prefix used on those elements?
# Thanks,
# Munna
# --
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