[xsl] SelectingSubsetsOfNode-SetsByPositionIntervals

[mankar@xxxxxxxxxxxxxxx]

Hallo, after getting a lot of help from the xsl-list it became possible for
this xml source doc:

<?xml version="1.0" encoding="ISO-8859-7"?>
<ROWSET>
      <ROW num="1">
            <SHAPE>
                  <ELEM_INFO>
                        <ELEM_INFO_ITEM>1</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>1003</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>1</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>6</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>1003</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>1</ELEM_INFO_ITEM>
                  </ELEM_INFO>
                  <ORDINATES>
                        <ORDINATES_ITEM>483639.599589384</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314480.8582032</ORDINATES_ITEM>
                        <ORDINATES_ITEM>483653.418277397</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314497.09551522</ORDINATES_ITEM>
                        <ORDINATES_ITEM>483696.866709438</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314548.14836326</ORDINATES_ITEM>
                        <ORDINATES_ITEM>483639.599589384</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314480.8582032</ORDINATES_ITEM>
                  </ORDINATES>
            </SHAPE>
      </ROW>
      <ROW num="2">
            <SHAPE>
                  <ELEM_INFO>
                        <ELEM_INFO_ITEM>1</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>1003</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>1</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>5</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>2003</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>1</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>13</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>2003</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>1</ELEM_INFO_ITEM>
                  </ELEM_INFO>
                  <ORDINATES>
                        <ORDINATES_ITEM>483168.460580946</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314454.74669918</ORDINATES_ITEM>
                        <ORDINATES_ITEM>483171.116692948</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314465.79279519</ORDINATES_ITEM>
                        <ORDINATES_ITEM>483183.52147696</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314517.37383524</ORDINATES_ITEM>
                        <ORDINATES_ITEM>483203.420852978</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314600.12101931</ORDINATES_ITEM>
                        <ORDINATES_ITEM>483204.637028979</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314605.17829932</ORDINATES_ITEM>
                        <ORDINATES_ITEM>483168.460580946</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314454.74669918</ORDINATES_ITEM>
                        <ORDINATES_ITEM>483198.743348974</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314725.56217143</ORDINATES_ITEM>
                        <ORDINATES_ITEM>483198.594772974</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314728.70069943</ORDINATES_ITEM>
                        <ORDINATES_ITEM>483192.709572968</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314852.93913155</ORDINATES_ITEM>
                        <ORDINATES_ITEM>483198.743348974</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314725.56217143</ORDINATES_ITEM>
                  </ORDINATES>
            </SHAPE>
      </ROW>
</ROWSET>

 to be transformed with the use of the following stylesheet:

<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
      <xsl:output indent="yes"/>
      <xsl:template match="/">
      <PolygonSet>
      <xsl:for-each select="ROWSET/ROW">
      <polygon>
                  <xsl:for-each select="SHAPE/ORDINATES/ORDINATES_ITEM">
                        <xsl:choose>
                              <xsl:when test="position()  =
ancestor::SHAPE/ELEM_INFO/ELEM_INFO_ITEM[position() mod 3=1]">
                                    <xsl:value-of select="concat('M',.)"/>
                                    <xsl:text> </xsl:text>
                              </xsl:when>
                              <xsl:otherwise>
                                    <xsl:value-of select="."/>
                                    <xsl:text> </xsl:text>
                              </xsl:otherwise>
                        </xsl:choose>
                  </xsl:for-each>
            </polygon>
            </xsl:for-each>
            </PolygonSet>
      </xsl:template>
</xsl:stylesheet>

into the following xml output:

<?xml version="1.0" encoding="UTF-8"?>
<PolygonSet>
      <polygon>M483639.599589384 4314480.8582032 483653.418277397
4314497.09551522 483696.866709438 M4314548.14836326 483639.599589384
4314480.8582032 </polygon>
      <polygon>M483168.460580946 4314454.74669918 483171.116692948
4314465.79279519 483183.52147696 4314517.37383524 483203.420852978
4314600.12101931 483204.637028979 4314605.17829932 483168.460580946
4314454.74669918 M483198.743348974 4314725.56217143 483198.594772974
4314728.70069943 483192.709572968 4314852.93913155 483198.743348974
4314725.56217143 </polygon>
      <polygon>M483168.460580946 4314454.74669918 M483171.116692948
4314465.79279519 483183.52147696 4314517.37383524 483203.420852978
4314600.12101931 483204.637028979 4314605.17829932 483168.460580946
4314454.74669918 483198.743348974 4314725.56217143 483198.594772974
4314728.70069943 483192.709572968 4314852.93913155 483198.743348974
4314725.56217143 </polygon>
</PolygonSet>


which selects all ORDINATE_ITEM elements of each ROW/SHAPE as string
content of a polygon element,adding an M character at the same time to the
content of ORDINATE_ITEM elements whose position is denoted by the
ELEM_INFO_ITEM[position()mod 3=1] content for each ROW/SHAPE.

I was wondering if it is also possible to select subsets of the
ORDINATE_ITEM node-set of each SHAPE by using these positions declared by
ELEM_INFO_ITEM[position()mod 3=1].I mean for example, for the fisrt
ROW/SHAPE of the source XML, using this XPath syntax i get to select
ORDINATE_ITEM elements whose position is 1 and 6.
<ROW num="1">
            <SHAPE>
                  <ELEM_INFO>
                        <ELEM_INFO_ITEM>1</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>1003</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>1</ELEM_INFO_ITEM>

                        <ELEM_INFO_ITEM>6</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>1003</ELEM_INFO_ITEM>
                        <ELEM_INFO_ITEM>1</ELEM_INFO_ITEM>
                  </ELEM_INFO>
                  <ORDINATES>
                        <ORDINATES_ITEM>483639.599589384</ORDINATES_ITEM>
1st position
                        <ORDINATES_ITEM>4314480.8582032</ORDINATES_ITEM>
                        <ORDINATES_ITEM>483653.418277397</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314497.09551522</ORDINATES_ITEM>
                        <ORDINATES_ITEM>483696.866709438</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314548.14836326</ORDINATES_ITEM>
6th position
                        <ORDINATES_ITEM>483639.599589384</ORDINATES_ITEM>
                        <ORDINATES_ITEM>4314480.8582032</ORDINATES_ITEM>

Can i also use this XPath syntax to define position intervals (1-5) and
(6-last) and select all ORDINATE_ITEM elemets between these positions into
diferrent node-sets.To be more specific can i select all ORDINATE_ITEM
elements from position 1 to position 5 and then all all ORDINATE_ITEM
elements from position 6 to the last position?
Thanks

Regards
Manousos
Athens