Something like this:
declare variable $URI as xs:string external;
let $book := fn:doc($URI)/book
return xdmp:node-insert-child($book,
<total-chapters>{fn:count($book/chapter)}</total-chapters>)
________________________________________
From: [email protected]
[[email protected]] on behalf of Mark Shanks
[[email protected]]
Sent: 20 June 2015 19:31
To: [email protected]
Subject: [MarkLogic Dev General] How to insert into a document the number of
a particular element
Hi,
So I’m looking for a xquery function that I would have thought would be quite
common, but searching has turned up a blank (partly because the search terms I
can think of are too generic). Say if you have the following documents:
<book>
<title>Moby Dick</title>
<chapter>Chapter 1 title</chapter>
<chapter>Chapter 2 title</chapter>
</book>
<book>
<title>War of the Worlds</title>
<chapter>Chapter 1 title</chapter>
<chapter>Chapter 2 title</chapter>
<chapter>Chapter 3 title</chapter>
</book>
You can import all of the documents into corb using the following get-uris.xqy:
xquery version "1.0-ml";
let $uris := cts:uris('', 'document')
return (count($uris), $uris)
I would then like to add another element to each book document that gives the
number of chapters in each of the books, i.e., the resulting documents should
be like this:
<book>
<title>Moby Dick</title>
<chapter>Chapter 1 title</chapter>
<chapter>Chapter 2 title</chapter>
<total chapters>2</total chapters>
</book>
<book>
<title>War of the Worlds</title>
<chapter>Chapter 1 title</chapter>
<chapter>Chapter 2 title</chapter>
<chapter>Chapter 3 title</chapter>
<total chapters>3</total chapters>
</book>
What xquery would one use in the transform-docs.xqy to do this? Inserting
another element is easy (xdmp:node-insert-child) but actually counting up the
number of a particular element for each document is what I’m not sure of. Any
insight appreciated.
Thanks,
Mark
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