Thanks for your help. I am trying to process all nodes, though, not
just the PIs. It looks as if I change this, it will only grab the PIs
that are not specified, and not the other content. Am I interpreting
this correctly?
----- Original Message -----
From: Abel Braaksma <abel(_dot_)online(_at_)xs4all(_dot_)nl>
Date: Wednesday, January 3, 2007 3:23 pm
Subject: Re: [xsl] suppressing only the last PI
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Emily(_dot_)Garrett(_at_)thomson(_dot_)com wrote:
However, the following instruction occurs prior to the content and
should suppress only the last PI, but is suppressing all processing
instructions named TL_XSL and whose value beings with 'PageEnd_'
and not
just the last one:
<xsl:apply-templates
select="node()[not(self::processing-instruction('TL_XSL')[starts-
with(.,> 'PageEnd_')][position()=last()])]"/>
Can anyone tell what is wrong with it and why it is not just
suppressing> the last one?
Hi Emily,
Instead of not(), use position != last(). Like this:
node()[self::processing-instruction('TL_XSL')
[starts-with(.,'PageEnd_')]][position()!=last()]
Using the function not() returns true if the so-called effective
boolean
value of the argument returns false. In your case, the instruction
inside the brackets is an xpath expression that always returns
something
when at a processing instruction. The reverse being false. This
has to
do with shifting the square brackets. This becomes apparent when
dissecting your expression:
node()
[not
(
self::processing-instruction('TL_XSL')
[starts-with(., 'PageEnd_')]
[position()=last()]
)
]
Remove not() and proc-instr() for clarity leaves:
1) node()[[starts-with(., 'PageEnd_')]
2) [position()=last()]]
Look closely at the square brackets. It says: "In the current
node, select all that starts with PageEnd, and if so, select the
last one you find". Effectively, you select a "group of one node
and take its last node", which is always true (for nodes that
start with PageEnd that is).
Reverse that, and it is always false.
If you want to use not(), you can do so, but put the brackets in
the right position, and reverse only the part you want to reverse
(namely, the test for last()):
node()
[self::processing-instruction('TL_XSL')]
[starts-with(., 'PageEnd_')]
[not(position()=last())]
But I'd find it more readable using != instead of not(), but
that's a matter of taste.
HtH,
Cheers,
-- Abel Braaksma
http://www.nuntia.nl
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