Hi everyone,
I'm having some trouble getting my bibliography to be sorted alphabetically using dropping particles and non-dropping particles (eg. Van der Wal). The only way I can get them to be sorted correctly is to capitalise the first letter of all the parts of the surname (Van Der Wal), but I don't want to do this. In the bibliography, the entries should be in this order:
Van Beusekom
Van de Koppell
Van der Wal
Van Eerdt

But at the moment, I can only get it to be listed as this:
Van Beusekom
Van Eerdt
Van de Koppell
Van der Wal

As I say, it seems to put them in the right order when I capitalise the "de" to "De", but I don't want to do this. Can anyone help?

Here is the relevant parts of my code (I think):

<style xmlns="http://purl.org/net/xbiblio/csl" class="in-text" version="1.0" demote-non-dropping-particle="never">


<macro name="author">
<names variable="author">
<name name-as-sort-order="all" and="text" sort-separator=", " delimiter=", " delimiter-precedes-last="never" form="long">
</name>
<label form="short" prefix=" (" suffix=".)" text-case="lowercase" strip-periods="true"/>
<substitute>
<names variable="editor"/>
<text macro="anon"/>
</substitute>
</names>
</macro>


<bibliography hanging-indent="true" et-al-min="20" et-al-use-first="1">
<sort>
<key macro="author"/>
<key macro="year-date"/>
<key variable="title"/>
</sort>
<layout suffix=".">
<group delimiter=" ">
<text macro="author"/>
<text macro="year-date" prefix="(" suffix=")"/>
<text macro="title"/>
<text macro="edition"/>
<text macro="container-prefix"/>
<group delimiter=", ">
<text macro="editor"/>
<text variable="container-title" font-style="italic"/>
<text variable="collection-title"/>
<text variable="genre"/>
<text macro="publisher"/>
<text macro="locator"/>
<text macro="published-date"/>
<text macro="pages"/>
</group>
</group>
</layout>
</bibliography>