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Re: unparsed-text and nodes by position

Subject: Re: unparsed-text and nodes by position
From: "Imsieke, Gerrit, le-tex" <gerrit.imsieke@xxxxxxxxx>
Date: Fri, 25 Dec 2009 15:14:57 +0100
Re:  unparsed-text and nodes by position
Dear Brian,

There are two issues:

1. empty (or whitespace-only) elements
2. everything seems to be position()=1

ad 1.
This is because if you split '|a|b|c|' at '|', you will get five (!) elements, the first and last being empty. You should process the input so that your inner tokenizer encounters strings such as 'a|b|c'.

ad 2.
This is because in the for-each loop, the dynymic context is being set to every item in turn. So inside for-each, the current item is the only item in the dynymic context, and its position is always 1. http://www.w3.org/TR/xpath-functions/#func-position In these circumstances it often helps to store the sequence in a variable (you might use something like fn:index-of($line, .) inside for-each if you really want to check the position of the current element -- but this is only unambiguous if everybody has a unique name within a family).



Here's a solution:


 <xsl:template match="/">
   <root>
     <xsl:if test="unparsed-text-available('test.txt', 'ISO-8859-1')">
       <xsl:variable name="datafile" select="unparsed-text('test.txt', 'ISO-8859-1')" as="xs:string"/>
       <xsl:for-each select="tokenize(normalize-space($datafile), '[\s*\r\n]+')">
         <rootpart>
           <xsl:variable name="line"
             select="tokenize(
                       replace(., '^[|]Family[|](.+?)[|]?\s*$', '$1'),
                       '[|]'
                     )"
             as="xs:string*" />
           <father>
             <xsl:value-of select="$line[1]"/>
           </father>
           <mother>
             <xsl:value-of select="$line[2]"/>
           </mother>
           <xsl:for-each select="$line[position() gt 2]">
             <child>
               <xsl:value-of select="."/>
             </child>
           </xsl:for-each>
         </rootpart>
       </xsl:for-each>
     </xsl:if>
   </root>
 </xsl:template>

Gerrit

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