[xquery-talk] reconstructing missing attributes

[David Carlisle]

If your processor supports preceding-sibling then it's easy:

<x>
{/x/*/element {name()} {(.|preceding-sibling::*)[@id][last()]/@id}}
</x>

$ saxon8q -s abc.xml abc.xq
<?xml version="1.0" encoding="UTF-8"?>
<x>
   <a id="1"/>
   <a id="1"/>
   <a id="1"/>
   <a id="2"/>
   <b id="2"/>
   <b id="2"/>
   <b id="2"/>
   <c id="2"/>
   <a id="3"/>
   <a id="3"/>
   <b id="3"/>
   <c id="3"/>
   <c id="3"/>
   <a id="4"/>
   <a id="4"/>
   <a id="4"/>
   <a id="5"/>
   <b id="5"/>
   <b id="5"/>
   <a id="6"/>
</x>

if not it's slightly more tiresome but you can always rewrite the axis
in terms of <<

fullaxis.xsl rewites the above to
<x>
{//x/*/ element {name()}{(. |
(let $here := . return
   reverse(../*[. << $here]))
/.)[@id][last()]/@id}}
</x>

for example (which gives the same result in saxon)

David

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