[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: double document merge using keys

Subject: Re: double document merge using keys
From: Michael Kay <mike@xxxxxxxxxxxx>
Date: Thu, 24 Jun 2010 16:14:50 +0100
Re:  double document merge using keys
It would get horribly inefficient if you had millions of pages, but if you only have a hundred or so, you can key the lesson on every page in its range thus:

<xsl:key name="p" match="Chapterlesson" use="startNum to endNum"/>

You can then find the Chapterlessons that have some overlap with a given range using

(for $p in $localStart to $localEnd return key('p', $p)) | ()

(The | () is to eliminate duplicates)

and then you can filter this to find those that are wholly within your range rather than merely having some overlap.

However, on reflection, I think this is unlikely to perform any better than a straight search of the data using a predicate.

If you really need a high-performance solution then some kind of sort-merge-grouping process might be the answer - but it will be complex.

Michael Kay

On 24/06/2010 15:36, Terry Ofner wrote:
Is it possible to "key" on two values during a document merge? Let me explain.

I have document that includes lesson name and the page range of the lesson:

Writing with Power
Pages 512

Collaborating Through the Writing Process
Pages 1332

I have transformed the information into the following xml:

        <Chapterlesson code="6.1.1">
          <lesson>Writing with Power</lesson>
       <Chapterlesson code="6.1.2">
          <lesson>Collaborating Through the Writing Process</lesson>

I have a set of standards that need to be aligned with each lesson. The standards are coded to the page, not the lesson. Here is a snippet of the current xml of standardDoc.xml:

    <stand startNum="5" endNum="5">19.A.4</stand>
    <stand startNum="11" endNum="11">14.D.2</stand>
    <stand startNum="11" endNum="11">14.D.3</stand>
    <stand startNum="13" endNum="14">14.A.2</stand>
    <stand startNum="15" endNum="15">14.A.1</stand>
    <stand startNum="16" endNum="16">14.A.1</stand>

The following stylesheet works as far as it goes. It only captures the standards that match the start page of the lesson. What I need is way to address standards with startNum>= $localStart and<= $localEnd. Is there a way to do this using keys?

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0">

     <xsl:variable name="stand2page" select="document('stand2page.xml')"/>
     <xsl:key name="standPage" match="stand" use="@startNum"/>

<xsl:template match="Chapterlesson"> <xsl:copy> <xsl:copy-of select="@*"/> <xsl:apply-templates/> <xsl:variable name="localStart" select="startNum"/> <xsl:variable name="localEnd" select="endNum"/> <xsl:for-each select="$stand2page"> <stand><xsl:copy-of select="key('standPage', $localStart)"/></stand> </xsl:for-each> </xsl:copy> </xsl:template>

Current Thread


Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
First Name
Last Name
Subscribe in XML format
RSS 2.0
Atom 0.3
Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.