How to enumerate indexed (xsl:key) items? - xslt

Question

I'm new in xml, sorry for the dumb question. I'm trying to create xsl template to convert Source xml to Destination. Actually it's almost done but I don't know how to enumerate <creator>'s correctly (creator#affil in Destination xml).
Source:
<?xml version="1.0" encoding="iso-8859-1"?>
<CREATORS>
<PERSON ROLE="CONTACT">
<PREFIX>Prof</PREFIX>
<FIRST_NAME>Mike</FIRST_NAME>
<MIDDLE_INITIALS>J</MIDDLE_INITIALS>
<LAST_NAME>Petrov</LAST_NAME>
<SUFFIX/>
<POSITION>Director</POSITION>
<EMAIL_1>pontorez#pontorez.ru</EMAIL_1>
<EMAIL_2>webmaster#pontorez.ru</EMAIL_2>
<URL>www.pontorez.ru</URL>
<MOBILE_PHONE/>
<ADDRESS>
<DEPARTMENT/>
<ORGANISATION>Example</ORGANISATION>
<ADDRESS_1>Finch Pavilion</ADDRESS_1>
<ADDRESS_2>Middle Way</ADDRESS_2>
<CITY>Oxford</CITY>
<ZIP>OX9 7LG</ZIP>
<REGION/>
<COUNTRY CODE="GB">UK</COUNTRY>
<PHONE_1>[phone]</PHONE_1>
<PHONE_2/>
<FAX_1>[phone]</FAX_1>
<FAX_2/>
</ADDRESS>
<FOOTNOTE/>
</PERSON>
<PERSON ID="7091" ROLE="AUTHOR">
<PREFIX>Prof</PREFIX>
<FIRST_NAME>Mike</FIRST_NAME>
<MIDDLE_INITIALS>J</MIDDLE_INITIALS>
<LAST_NAME>Petrov</LAST_NAME>
<SUFFIX/>
<POSITION>Director</POSITION>
<EMAIL_1>pontorez#pontorez.ru</EMAIL_1>
<EMAIL_2>webmaster#pontorez.ru</EMAIL_2>
<URL>www.pontorez.ru</URL>
<MOBILE_PHONE/>
<ADDRESS>
<DEPARTMENT/>
<ORGANISATION>Example</ORGANISATION>
<ADDRESS_1>Finch Pavilion</ADDRESS_1>
<ADDRESS_2>Middle Way</ADDRESS_2>
<CITY>Oxford</CITY>
<ZIP>OX9 7LG</ZIP>
<REGION/>
<COUNTRY CODE="GB">UK</COUNTRY>
<PHONE_1>[phone]</PHONE_1>
<PHONE_2/>
<FAX_1>[phone]</FAX_1>
<FAX_2/>
</ADDRESS>
<FOOTNOTE>Author footnote</FOOTNOTE>
</PERSON>
<PERSON ID="7094" ROLE="AUTHOR">
<PREFIX>Mrs</PREFIX>
<FIRST_NAME>Anne</FIRST_NAME>
<MIDDLE_INITIALS/>
<LAST_NAME>Spencer</LAST_NAME>
<SUFFIX/>
<POSITION/>
<EMAIL_1>aspencer#Hardware.co.uk</EMAIL_1>
<EMAIL_2/>
<URL/>
<MOBILE_PHONE/>
<ADDRESS>
<DEPARTMENT/>
<ORGANISATION>Example</ORGANISATION>
<ADDRESS_1>SEO R&D Programme</ADDRESS_1>
<ADDRESS_2>Finch Pavilion, Middle Way</ADDRESS_2>
<CITY>Oxford</CITY>
<ZIP>OX9 7LG</ZIP>
<REGION>Oxfordshire</REGION>
<COUNTRY CODE="GB">UK</COUNTRY>
<PHONE_1>[phone]</PHONE_1>
<PHONE_2/>
<FAX_1>[phone]</FAX_1>
<FAX_2/>
</ADDRESS>
<FOOTNOTE/>
</PERSON>
<PERSON ID="15756" ROLE="AUTHOR">
<PREFIX>Mr</PREFIX>
<FIRST_NAME>Ed</FIRST_NAME>
<MIDDLE_INITIALS/>
<LAST_NAME>Gantos</LAST_NAME>
<SUFFIX/>
<POSITION>Senior Medical Statistician</POSITION>
<EMAIL_1>santos#xxx.org.uk</EMAIL_1>
<EMAIL_2/>
<URL>http://www.isds.sxo.ac.uk/</URL>
<MOBILE_PHONE/>
<ADDRESS>
<DEPARTMENT>Head of SEO Support</DEPARTMENT>
<ORGANISATION>Centre for Statistics in Software</ORGANISATION>
<ADDRESS_1>Pearson College</ADDRESS_1>
<ADDRESS_2>Linton Road</ADDRESS_2>
<CITY>Oxford</CITY>
<ZIP>OX9 6UD</ZIP>
<REGION/>
<COUNTRY CODE="GB">UK</COUNTRY>
<PHONE_1>[phone]</PHONE_1>
<PHONE_2/>
<FAX_1>[phone]</FAX_1>
<FAX_2/>
</ADDRESS>
<FOOTNOTE/>
</PERSON>
<PERSON ID="7092" ROLE="AUTHOR">
<PREFIX>Dr</PREFIX>
<FIRST_NAME>Sherry</FIRST_NAME>
<MIDDLE_INITIALS/>
<LAST_NAME>Wilson</LAST_NAME>
<SUFFIX/>
<POSITION/>
<EMAIL_1>wilson#Hardware.co.uk</EMAIL_1>
<EMAIL_2/>
<URL/>
<MOBILE_PHONE/>
<ADDRESS>
<DEPARTMENT/>
<ORGANISATION>Example</ORGANISATION>
<ADDRESS_1>SEO R&D Programme</ADDRESS_1>
<ADDRESS_2>Finch Pavilion, Middle Way</ADDRESS_2>
<CITY>Oxford</CITY>
<ZIP>OX9 7LG</ZIP>
<REGION>Oxfordshire</REGION>
<COUNTRY CODE="GB">UK</COUNTRY>
<PHONE_1>[phone]</PHONE_1>
<PHONE_2/>
<FAX_1>[phone]</FAX_1>
<FAX_2/>
</ADDRESS>
<FOOTNOTE/>
</PERSON>
<GROUP ID="????">
<GROUP_NAME>Bond team</GROUP_NAME>
<CONTACT_PERSON>Monica Bond</CONTACT_PERSON>
<EMAIL_1>mk#Hardware.dk</EMAIL_1>
<URL/>
<ADDRESS>
<DEPARTMENT>Nordic Hardware Centre</DEPARTMENT>
<ORGANISATION>Creyts, Dept 7512</ORGANISATION>
<ADDRESS_1>Blegdamsvej 219</ADDRESS_1>
<ADDRESS_2/>
<CITY>Copenhagen</CITY>
<ZIP>2900</ZIP>
<REGION/>
<COUNTRY CODE="DK">Denmark</COUNTRY>
<PHONE_1>[phone]</PHONE_1>
<PHONE_2>[phone]</PHONE_2>
<FAX_1>[phone]</FAX_1>
<FAX_2/>
</ADDRESS>
<FOOTNOTE>Group footnote</FOOTNOTE>
</GROUP>
<PERSON ID="3" ROLE="AUTHOR">
<PREFIX>Ms</PREFIX>
<FIRST_NAME>Monica</FIRST_NAME>
<MIDDLE_INITIALS/>
<LAST_NAME>Bond</LAST_NAME>
<SUFFIX/>
<POSITION>Director of the Hardware Information Management System</POSITION>
<EMAIL_1>mk#Hardware.dk</EMAIL_1>
<EMAIL_2/>
<URL>www.cc-ims.net</URL>
<MOBILE_PHONE/>
<ADDRESS>
<DEPARTMENT>Nordic Hardware Centre</DEPARTMENT>
<ORGANISATION>Creyts, Dept 7512</ORGANISATION>
<ADDRESS_1>Blegdamsvej 219</ADDRESS_1>
<ADDRESS_2/>
<CITY>Copenhagen</CITY>
<ZIP>2900</ZIP>
<REGION/>
<COUNTRY CODE="DK">Denmark</COUNTRY>
<PHONE_1>[phone]</PHONE_1>
<PHONE_2>[phone]</PHONE_2>
<FAX_1>[phone]</FAX_1>
<FAX_2/>
</ADDRESS>
<FOOTNOTE/>
</PERSON>
</CREATORS>
Destination:
<?xml version="1.0" encoding="utf-8"?>
<creatorGroup>
<creator affil="CD004002-aff-0001" creatorRole="author">
<forenames>Mike</forenames>
<surnamePrefix>J</surnamePrefix>
<surname>Petrov</surname>
<note id="CD004002-note-0001">
<p>Author footnote</p>
</note>
</creator>
<creator affil="CD004002-aff-0001" creatorRole="author">
<forenames>Anne</forenames>
<surname>Spencer</surname>
</creator>
<creator affil="CD004002-aff-0002" creatorRole="author">
<forenames>Ed</forenames>
<surname>Gantos</surname>
</creator>
<creator affil="CD004002-aff-0001" creatorRole="author">
<forenames>Sherry</forenames>
<surname>Wilson</surname>
</creator>
<creator affil="CD004002-aff-0003" type="collaboration" creatorRole="author">
<collab>Bond team</collab>
</creator>
<creator affil="CD004002-aff-0003" creatorRole="author">
<forenames>Monica</forenames>
<surname>Bond</surname>
</creator>
<creator affil="CD004002-aff-0001" creatorRole="contact">
<honorifics>Prof</honorifics>
<forenames>Mike</forenames>
<surnamePrefix>J</surnamePrefix>
<surname>Petrov</surname>
<jobTitle>Director</jobTitle>
<email>pontorez#pontorez.ru</email>
<email>webmaster#pontorez.ru</email>
</creator>
<affiliation id="CD004002-aff-0001" countryCode="GB">
<orgName>Example</orgName>
<address>
<street>Finch Pavilion</street>
<street>Middle Way</street>
<city>Oxford</city>
<country>UK</country>
<postCode>OX9 7LG</postCode>
</address>
</affiliation>
<affiliation id="CD004002-aff-0002" countryCode="GB">
<orgName>Centre for Statistics in Software</orgName>
<orgDiv>Head of SEO Support</orgDiv>
<address>
<street>Pearson College</street>
<street>Linton Road</street>
<city>Oxford</city>
<country>UK</country>
<postCode>OX9 6UD</postCode>
</address>
</affiliation>
<affiliation id="CD004002-aff-0003" countryCode="DK">
<collabContact>Monica Bond</collabContact>
<orgName>Creyts, Dept 7512</orgName>
<orgDiv>Nordic Hardware Centre</orgDiv>
<address>
<street>Blegdamsvej 219</street>
<city>Copenhagen</city>
<country>Denmark</country>
<postCode>2900</postCode>
</address>
</affiliation>
</creatorGroup>
XSL stylesheet that I created:
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxsl="urn:schemas-microsoft-com:xslt" exclude-result-prefixes="msxsl">
<xsl:output method="xml" indent="yes"/>
<xsl:key name="affiliations" match="ORGANISATION" use="."/>
<xsl:template name="kreator">
<xsl:variable name="affid">
<!-- The numbering problem is in the below line: -->
<xsl:number format="0001" value="position()"/>
</xsl:variable>
<xsl:variable name="role">
<xsl:choose>
<xsl:when test="#ROLE='AUTHOR' or name()='GROUP'">author</xsl:when>
<xsl:otherwise>contact</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<creator affil="CD004002-aff-{$affid}">
<xsl:if test="GROUP_NAME!=''">
<xsl:attribute name="type">collaboration</xsl:attribute>
</xsl:if>
<xsl:attribute name="creatorRole">
<xsl:value-of select="$role"/>
</xsl:attribute>
<xsl:if test="$role='contact'">
<honorifics>
<xsl:value-of select="PREFIX"/>
</honorifics>
</xsl:if>
<xsl:if test="GROUP_NAME!=''">
<collab>
<xsl:value-of select="GROUP_NAME"/>
</collab>
</xsl:if>
<xsl:if test="FIRST_NAME">
<forenames>
<xsl:value-of select="FIRST_NAME"/>
</forenames>
</xsl:if>
<xsl:if test="MIDDLE_INITIALS!=''">
<surnamePrefix>
<xsl:value-of select="MIDDLE_INITIALS"/>
</surnamePrefix>
</xsl:if>
<xsl:if test="LAST_NAME">
<surname>
<xsl:value-of select="LAST_NAME"/>
</surname>
</xsl:if>
<xsl:if test="FOOTNOTE!='' and name()='PERSON'">
<note id="CD004002-note-{$affid}">
<p>
<xsl:value-of select="FOOTNOTE"/>
</p>
</note>
</xsl:if>
<xsl:if test="$role='contact'">
<jobTitle><xsl:value-of select="POSITION"/></jobTitle>
<email><xsl:value-of select="EMAIL_1"/></email>
<email><xsl:value-of select="EMAIL_2"/></email>
</xsl:if>
</creator>
<xsl:text>
</xsl:text>
</xsl:template>
<xsl:template match="/CREATORS">
<xmp>
<creatorGroup>
<!-- list of creators: -->
<xsl:for-each select="PERSON[#ROLE='AUTHOR'] | GROUP">
<xsl:call-template name="kreator"/>
</xsl:for-each>
<xsl:for-each select="PERSON[#ROLE='CONTACT']">
<xsl:call-template name="kreator"/>
</xsl:for-each>
<!-- list of affiliations: -->
<xsl:for-each select="//ORGANISATION[generate-id(.)=generate-id(key('affiliations', .))]">
<affiliation>
<xsl:attribute name="id">
CD004002-aff-000<xsl:value-of select="position()"/>
</xsl:attribute>
<xsl:attribute name="countryCode">
<xsl:value-of select="../COUNTRY/#CODE"/>
</xsl:attribute>
<xsl:if test="../../CONTACT_PERSON">
<collabContact>
<xsl:value-of select="../../CONTACT_PERSON"/>
</collabContact>
</xsl:if>
<orgName>
<xsl:value-of select="."/>
</orgName>
<xsl:if test="../DEPARTMENT!=''">
<orgDiv>
<xsl:value-of select="../DEPARTMENT"/>
</orgDiv>
</xsl:if>
<address>
<street>
<xsl:value-of select="../ADDRESS_1"/>
</street>
<xsl:if test="../ADDRESS_2!=''">
<street>
<xsl:value-of select="../ADDRESS_2"/>
</street>
</xsl:if>
<city>
<xsl:value-of select="../CITY"/>
</city>
<country>
<xsl:value-of select="../COUNTRY"/>
</country>
<postCode>
<xsl:value-of select="../ZIP"/>
</postCode>
</address>
</affiliation>
<xsl:text>
</xsl:text>
</xsl:for-each>
</creatorGroup>
</xmp>
</xsl:template>
</xsl:stylesheet>
I.e. I want to get <creator> numbering like the below:
<creator affil="CD004002-aff-0001" creatorRole="author"/>
<creator affil="CD004002-aff-0001" creatorRole="author"/>
<creator affil="CD004002-aff-0002" creatorRole="author"/>
<creator affil="CD004002-aff-0001" creatorRole="author"/>
<creator affil="CD004002-aff-0003" type="collaboration" creatorRole="author"/>
<creator affil="CD004002-aff-0003" creatorRole="author"/>
<creator affil="CD004002-aff-0001" creatorRole="contact"/>
While my current XSL stylesheet produces wrong #affil's:
<creator affil="CD004002-aff-0004" creatorRole="author"/>
<creator affil="CD004002-aff-0004" creatorRole="author"/>
<creator affil="CD004002-aff-0001" creatorRole="author"/>
<creator affil="CD004002-aff-0004" creatorRole="author"/>
<creator affil="CD004002-aff-0002" type="collaboration" creatorRole="author"/>
<creator affil="CD004002-aff-0002" creatorRole="author"/>
<creator affil="CD004002-aff-0004" creatorRole="contact"/>
Can you help please? Thanks.

Answer 1

Your problem is that when you do:
<xsl:call-template name="kreator" />
then you do it in the context of the <PERSON> or <GROUP> you are currently handling.
This means that position() will tell you the position of those elements. It cannot magically know that you are interested in the position of the first <ORGANISATION> that matches the current one.
And this means you must iterate all <ORGANISATION>s much the same way you do it to calculate the <affiliation> attribute #id:
<xsl:variable name="affid">
<xsl:variable name="org" select="ADDRESS/ORGANISATION" />
<xsl:for-each select="//ORGANISATION[
generate-id()
=
generate-id(key('affiliations', .)[1])
]">
<xsl:if test=". = $org">
<xsl:number format="0001" value="position()"/>
</xsl:if>
</xsl:for-each>
</xsl:variable>
Note the use of <xsl:if> to make sure that the variable eventually contains only one value, even though you are looking through all of them.
For larger documents, you could introduce another key:
<xsl:key name="organisations" match="ORGANISATION" use="'all'" />
and use that as a drop-in replacement for all the comparatively inefficient "//ORGANISATION" expressions, e.g. instead of:
<xsl:for-each select="//ORGANISATION">
<!-- ... -->
</xsl:for-each>
use:
<xsl:for-each select="key('organisations', 'all')">
<!-- ... -->
</xsl:for-each>