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Re: pathDeterminationByGlobalVariable

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Subject: Re: pathDeterminationByGlobalVariable
From: Mukul Gandhi <mukul_gandhi@xxxxxxxxx>
Date: Wed, 11 Aug 2004 08:02:43 -0700 (PDT)
xsl if descendant
Hi Manousos,
  Please try this XSL -

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xalan="http://xml.apache.org/xalan"
exclude-result-prefixes="xalan">

<xsl:output method="xml" indent="yes"/>
	
<xsl:template match="/ROWSET">
  <set>
    <xsl:for-each select="ROW">
      <xsl:variable name="row" select="."/>
	<polygon>
	  <xsl:variable name="rtf">
	    <xsl:for-each
select="descendant::ELEM_INFO_ITEM">
	      <xsl:if test="((position() mod 3) = 1) and
(position() &gt; 1)">
		<x>
		 <xsl:value-of select="."/>
		</x>
	      </xsl:if>
	    </xsl:for-each>
	  </xsl:variable>
	  <xsl:for-each select="xalan:nodeset($rtf)/x">
	    <xsl:variable name="a" select="."/>
	      <xsl:if test="position() &lt; last()">
	        <xsl:variable name="b"
select="following-sibling::x[1]"/>
		  <interior>
		    <xsl:copy-of
select="$row//ORDINATES_ITEM[(position() &gt;= $a) and
(position() &lt; $b) ]"/>
		  </interior>
	      </xsl:if>
	      <xsl:if test="position() = last()">
		<interior>
	  	  <xsl:copy-of
select="$row//ORDINATES_ITEM[position() &gt;= $a]"/>
		</interior>
	      </xsl:if>
	    </xsl:for-each>
	</polygon>
    </xsl:for-each>
</set>
</xsl:template>
	
</xsl:stylesheet>

Regards,
Mukul

--- mankar@xxxxxxxxxxxxxxx wrote:
> 
> Hallo,
> 
> I am using this xslt code:
> 
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <xsl:stylesheet version="1.0"
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
> 
> <xsl:output method="xml" indent="yes"/>
> 
> <xsl:variable name="root" select="/" />
> 
> <xsl:template match="ROWSET">
>   <set>
>   <xsl:for-each select="ROW">
>   <polygon>
>      <xsl:variable name="rtf">
>        <xsl:for-each
> select="descendant::ELEM_INFO_ITEM">
>          <xsl:if test="((position() mod 3) = 1) and
> (position() &gt; 1)">
>            <x>
>              <xsl:value-of select="." />
>            </x>
>          </xsl:if>
>        </xsl:for-each>
>      </xsl:variable>
> 
>      <xsl:for-each select="$rtf/x">
>        <xsl:variable name="a" select="." />
>        <xsl:if test="position() &lt; last()">
> 
>          <xsl:variable name="b"
> select="following-sibling::x[1]" />
>            <interior>
>            <xsl:copy-of
> select="$root//ORDINATES_ITEM[(position() &gt; ($a -
> 1)) and (position() &lt; $b) ]" />
>          </interior>
>       </xsl:if>
>       <xsl:if test="position() = last()">
>          <interior>
>            <xsl:copy-of
> select="$root//ORDINATES_ITEM[position() &gt; ($a -
> 1)]" />
>          </interior>
>       </xsl:if>
>       </xsl:for-each>
> </polygon>
> </xsl:for-each>
>   </set>
> </xsl:template>
> 
> </xsl:stylesheet>
> 
> 
> to transform this xml source:
> 
> 
> <?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>50</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>5</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>2003</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>50</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>9</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>2003</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>50</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>12</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>2003</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>50</ELEM_INFO_ITEM>
>                   </ELEM_INFO>
>                   <ORDINATES>
>                        
> <ORDINATES_ITEM>52</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>45</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>54</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>57</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>76</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>78</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>56</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>1</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>2</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>3</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>4</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>5</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>6</ORDINATES_ITEM>
>                   </ORDINATES>
>             </SHAPE>
>       </ROW>
> </ROWSET>
> 
> 
> into this output xml:
> 
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <set>
>    <polygon>
>       <interior>
>          <ORDINATES_ITEM>76</ORDINATES_ITEM>
>          <ORDINATES_ITEM>78</ORDINATES_ITEM>
>          <ORDINATES_ITEM>56</ORDINATES_ITEM>
>          <ORDINATES_ITEM>1</ORDINATES_ITEM>
>       </interior>
>       <interior>
>          <ORDINATES_ITEM>2</ORDINATES_ITEM>
>          <ORDINATES_ITEM>3</ORDINATES_ITEM>
>          <ORDINATES_ITEM>4</ORDINATES_ITEM>
>       </interior>
>       <interior>
>          <ORDINATES_ITEM>5</ORDINATES_ITEM>
>          <ORDINATES_ITEM>6</ORDINATES_ITEM>
>       </interior>
>    </polygon>
> </set>
> 
> 
> As you can see, the previous xslt, creates a polygon
> element for each row,
> which contains as
> many interior elements as ELEM_INFO_ITEM elements
> are, in each row, with
> position :
> ((position() mod 3) = 1) and
> (position() &gt; 1)
> 
> Each interior element contains ORDINATES_ITEM
> elements between two
> threshold positions, which
> are selected specifically from ELEM_INFO_ITEM
> elements's values with the
> previously mentioned,
> specific positions, using local variables.
> 
> The global variable root is used in order to
> determine the appropriate path
> inside the inner loop
> and select the relevant ORDINATE_ITEM nodes for each
> interior.
> 
> I now want to extend the particular xslt code, in
> order to obtain the same
> output, by applying
> it on another similar source xml with more than one
> rows.I think that the
> only modification
> needed for this to work, is the path determination
> to select the
> appropriate ORDINATE_ITEM
> elements of each row, each time. So i keep the rest
> of the code unchanged
> and just alter the part:
> 
> from
> 
> <interior>
>            <xsl:copy-of
> select="$root//ORDINATES_ITEM........
> 
> to
> 
> <interior>
>            <xsl:copy-of
>
select="$root/ROWSET/ROW/SHAPE/ORDINATES/ORDINATES_ITEM........
> 
> so that the selected threshold positions are applied
> to each ROW descendant
> ORDINATE_ITEMS
> and not to all descendant ORDINATES_ITEM beginning
> from the root.
> 
> I don't know why, but it keeps on doing the same
> thing, i mean selects the
> threshold values
> correctly for each ROW, but applies them to all
> ORDINATE_ITEMS elements of
> the source doc
> and not just to the descendant ORDINATE_ITEMS
> elements of each ROW.
> 
> For example:
> 
> having this source:
> 
> <?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>50</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>5</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>2003</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>50</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>9</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>2003</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>50</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>12</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>2003</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>50</ELEM_INFO_ITEM>
>                   </ELEM_INFO>
>                   <ORDINATES>
>                        
> <ORDINATES_ITEM>52</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>45</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>54</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>57</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>76</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>78</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>56</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>1</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>2</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>3</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>4</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>5</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>6</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>50</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>3</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>2003</ELEM_INFO_ITEM>
>                        
> <ELEM_INFO_ITEM>50</ELEM_INFO_ITEM>
>                   </ELEM_INFO>
>                   <ORDINATES>
>                        
> <ORDINATES_ITEM>17</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>23</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>39</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>54</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>74</ORDINATES_ITEM>
>                        
> <ORDINATES_ITEM>98</ORDINATES_ITEM>
>                   </ORDINATES>
>             </SHAPE>
>       </ROW>
> </ROWSET>
> 
> 
> and apllying the slightly modified xsl:
> 
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <xsl:stylesheet version="1.0"
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
> 
> <xsl:output method="xml" indent="yes"/>
> 
> <xsl:variable name="root" select="/" />
> 
> <xsl:template match="ROWSET">
>   <set>
>   <xsl:for-each select="ROW">
>   <polygon>
>      <xsl:variable name="rtf">
>        <xsl:for-each
> select="descendant::ELEM_INFO_ITEM">
>          <xsl:if test="((position() mod 3) = 1) and
> (position() &gt; 1)">
>            <x>
>              <xsl:value-of select="." />
>            </x>
>          </xsl:if>
>        </xsl:for-each>
>      </xsl:variable>
> 
>      <xsl:for-each select="$rtf/x">
>        <xsl:variable name="a" select="." />
>        <xsl:if test="position() &lt; last()">
> 
>          <xsl:variable name="b"
> select="following-sibling::x[1]" />
>            <interior>
>            <xsl:copy-of
>
select="$root/ROWSET/ROW/SHAPE/ORDINATES/ORDINATES_ITEM[(position()
> &gt;
> ($a -
> 1)) and (position() &lt; $b) ]" />
>          </interior>
>       </xsl:if>
>       <xsl:if test="position() = last()">
>          <interior>
>            <xsl:copy-of
>
select="$root/ROWSET/ROW/SHAPE/ORDINATES/ORDINATES_ITEM[position()
> &gt; ($a
> -
> 1)]" />
>          </interior>
>       </xsl:if>
>       </xsl:for-each>
> </polygon>
> </xsl:for-each>
>   </set>
> </xsl:template>
> 
> </xsl:stylesheet>
> 
> 
> I am getting this result:
> 
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <set>
>    <polygon>
>       <interior>
>          <ORDINATES_ITEM>76</ORDINATES_ITEM>
>          <ORDINATES_ITEM>78</ORDINATES_ITEM>
>          <ORDINATES_ITEM>56</ORDINATES_ITEM>
>          <ORDINATES_ITEM>1</ORDINATES_ITEM>
>          <ORDINATES_ITEM>74</ORDINATES_ITEM>
>          <ORDINATES_ITEM>98</ORDINATES_ITEM>
>       </interior>
>       <interior>
>          <ORDINATES_ITEM>2</ORDINATES_ITEM>
>          <ORDINATES_ITEM>3</ORDINATES_ITEM>
>          <ORDINATES_ITEM>4</ORDINATES_ITEM>
>       </interior>
>       <interior>
>          <ORDINATES_ITEM>5</ORDINATES_ITEM>
>          <ORDINATES_ITEM>6</ORDINATES_ITEM>
>       </interior>
>    </polygon>
>    <polygon>
>       <interior>
>          <ORDINATES_ITEM>54</ORDINATES_ITEM>
>          <ORDINATES_ITEM>57</ORDINATES_ITEM>
>          <ORDINATES_ITEM>76</ORDINATES_ITEM>
>          <ORDINATES_ITEM>78</ORDINATES_ITEM>
>          <ORDINATES_ITEM>56</ORDINATES_ITEM>
>          <ORDINATES_ITEM>1</ORDINATES_ITEM>
>          <ORDINATES_ITEM>2</ORDINATES_ITEM>
>          <ORDINATES_ITEM>3</ORDINATES_ITEM>
>          <ORDINATES_ITEM>4</ORDINATES_ITEM>
>          <ORDINATES_ITEM>5</ORDINATES_ITEM>
>          <ORDINATES_ITEM>6</ORDINATES_ITEM>
>          <ORDINATES_ITEM>39</ORDINATES_ITEM>
>          <ORDINATES_ITEM>54</ORDINATES_ITEM>
>          <ORDINATES_ITEM>74</ORDINATES_ITEM>
>          <ORDINATES_ITEM>98</ORDINATES_ITEM>
>       </interior>
>    </polygon>
> </set>
> 
> The polygon elements are correctly created for each
> row.The number of
> created interior elements
> is also correct for each row.The threshold values
> are also correctly
> selected for each row.
> I mean, i am saying select all ORDINATEs_ITEM
> elemnts from position 5 to
> position 8 as content of
> the first interior element of the first row and it
> does this, but it also
> adds ORDINATE_ITEM elements
> from position 5 to position 8 that belong to the
> second row. The same thing
> happens with the
> ORDINATES_ITEM elements which are conetnt of the
> interior element of the
> second row.It does not
> just select the ORDINATES_ITEM from position 3 to
> the last as it should be,
> but it also selects
> ORDINATE_ITEM elements from the first row between
> the same positions
> I know the problem is the use of the Global
> variable.I mean it keeps on
> selecting from all root's descendants ORDINATES_ITEM
> elements.I tried
> modifying the value of the global variable as well,
> but i can't still avoid
> this from happening.Does anyone have any idea of how
> to fix this?
> 
> Thanks
> 
> 
> Regards
> Manousos




		
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