Kevin,
At 03:02 PM 2/23/2005, you wrote:
I tried to build a lookup table that would convert 2-digit month numbers
to their 3-letter abbreviation like this:
<xsl:variable name="months">
<abbrev>Jan</abbrev>
<abbrev>Feb</abbrev>
<abbrev>Mar</abbrev>
<abbrev>Apr</abbrev>
<abbrev>May</abbrev>
<abbrev>Jun</abbrev>
<abbrev>Jul</abbrev>
<abbrev>Aug</abbrev>
<abbrev>Sep</abbrev>
<abbrev>Oct</abbrev>
<abbrev>Nov</abbrev>
<abbrev>Dec</abbrev>
</xsl:variable>
And given a variable in YYYY-MM-DD format, I can get the abbreviation
with this expression:
$months/abbrev[number(substring($yyyy-mm-dd, 6, 2))]
Then I tried to index the table like this:
<xsl:key name="months-by-position" match="abbrev" use="position()"/>
And look up the abbreviation with this expression:
key('months-by-position', number(substring($yyyy-mm-dd, 6, 2)), $months)
But my output indicates that for all of the '02' through '12' numbers,
the key function returns an empty sequence, and for '01' it returns a
sequence of all the abbrev elements (which are serialized with a space
between them).
It seems that the context node when position is evaluated is the months
element, not the individual abbbrev elements. Can this be made to work
as I want?
No, it's the abbrev -- but each of them is getting assigned position() = 1.
This is because of the way position() works, which is different from what
you're expecting. It is specified to return not a number representing the
position of a node among its siblings, but one representing the position of
a node in a given processing context (the "current node list"). Since there
is none such when you declare a key, position() is pretty well useless
here: each node is taken to be the first in its current node list, so
they're all '1'.
You might have better luck with:
<xsl:key name="months-by-position" match="abbrev"
use="count(preceding-sibling::*) + 1"/>
which actually assigns the index number you want.
Cheers,
Wendell
======================================================================
Wendell Piez
mailto:wapiez(_at_)mulberrytech(_dot_)com
Mulberry Technologies, Inc. http://www.mulberrytech.com
17 West Jefferson Street Direct Phone: 301/315-9635
Suite 207 Phone: 301/315-9631
Rockville, MD 20850 Fax: 301/315-8285
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