Mapping: Fitting managers into rooms ?

Question

Hello All, The below map is disinclined to acquiesce to my request; translation: itz knot verkin.
I'm trying to fit the 'managers' in the source into 'room's in the target. Assuming a max of 4 rooms, I want them filled up with 4 managers per room (with some rooms remaining empty and not showing up in the target).
I'm learning how to map currently. Thanks for your help.
SOURCE:
<?xml version="1.0" encoding="UTF-8"?>
<ns0:s2 xmlns:ns0="urn://maptest">
  <managers>
    <personalID>PID001</personalID>
    <personalID>PID002</personalID>
    <personalID>PID003</personalID>
    <personalID>PID004</personalID>
    <personalID>PID005</personalID>
    <personalID>PID006</personalID>
    <personalID>PID007</personalID>
  </managers>
</ns0:s2>
MAPPING:
After the map runs, the target produced SHOULD look as follows:
TARGET:
<?xml version="1.0" encoding="UTF-8"?>
<ns0:t2 xmlns:ns0="urn://maptest">
  <room>
    <personalID>PID001</personalID>
    <personalID>PID002</personalID>
    <personalID>PID003</personalID>
    <personalID>PID004</personalID>
  </room>
  <room>
    <personalID>PID005</personalID>
    <personalID>PID006</personalID>
    <personalID>PID007</personalID>
  </room>
</ns0:t2>
In the source, managers is 1..1, while personalID is 0..unbounded.
In the target, room is 0..4, while personalID is 1..4.
Thanks, Bhishma

Answer 1

Dude,
I'm in the final phase of the project where I don't get much  to do, so I spend the whole day studying new stuff. =D
Your example sure was a hell of an exercise on XSLT.
Try this mapping on your scenario.
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:ns0="urn://maptest">
     <xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
     <xsl:param name="managers"/>
     <xsl:template match="/">
          <xsl:param name="managers" select="//personalID"/>
          <ns0:t2>
               <xsl:call-template name="rooms">
                    <xsl:with-param name="managers" select="$managers"/>
               </xsl:call-template>
          </ns0:t2>
     </xsl:template>
     <xsl:template name="rooms">
          <xsl:param name="managers"/>
          <xsl:call-template name="add_room">
               <xsl:with-param name="managers" select="subsequence($managers, 1, 4)"/>
          </xsl:call-template>
          <xsl:if test="not(empty(subsequence($managers, 5)))">
               <xsl:call-template name="rooms">
                    <xsl:with-param name="managers" select="subsequence($managers, 5)"/>
               </xsl:call-template>
          </xsl:if>
     </xsl:template>
     <xsl:template name="add_room">
          <xsl:param name="managers"/>
          <room>
               <xsl:for-each select="$managers">
                    <xsl:copy-of select="."/>
               </xsl:for-each>
          </room>
     </xsl:template>
</xsl:stylesheet>