I want to transform the following...
<root>
<rec>
<name>z</name>
<year>2004</name>
</rec>
<rec>
<name>z</name>
<year>2005</year>
</rec>
<rec>
<name>a</name>
<year>2002</year>
</rec>
<rec>
<name>a</name>
<year>2003</year>
</rec>
</root>
...to...
<root>
<rec>
<name tag="latest">a</name>
<year>2003</year>
</rec>
<rec>
<name>a</name>
<year>2002</year>
</rec>
<rec>
<name tag="latest">z</name>
<year>2005</year>
</rec>
<rec>
<name>z</name>
<year>2004</name>
</rec>
</root>
In other words, sort by <name> ascending and then by <year> descending
while tagging the most recent of each name.
The sorting is easy, but tagging the most recent is proving difficult
for me. I thought to use the preceding axis to test the preceding name
and if it is different than the current name put in the tag attribute,
but as I understand it, the precding axis applies to document order,
not sort order. Is there some better way to do this?
Thanks,
Stan Dyck
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