SSDN - Reusing a prior valid value in an input row if the current row is missing a value.

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Bob Chauvin

Subject: Reusing a prior valid value in an input row if the current row is missing a value.
Author: Bob Chauvin
Date: 26 Feb 2008 02:57 PM

Consider the following input xml snippit:

<data>
<row> <name>bob</name> <acct>12</acct><date>2007-01-11</date> </row>
<row> <name>bob</name> <acct></acct> <date></date> </row>
<row> <name>bob</name> <acct>13</acct> <date></date> </row>
</data>

If a row doesn't have a name, account or date it will pull it from a recent row that has the value, like so:

<out>
<row> <name>bob</name> <acct>12</acct><date>2007-01-11</date> </row>
<row> <name>bob</name> <acct>12</acct> <date>2007-01-11</date> </row>
<row> <name>bob</name> <acct>13</acct> <date>2007-01-11</date> </row>
</out>

Ivan Pedruzzi

Subject: Reusing a prior valid value in an input row if the current row is missing a value.
Author: Ivan Pedruzzi
Date: 26 Feb 2008 05:55 PM

See if the attached solution works for you, it should perform reasonably well

Ivan Pedruzzi
Stylus Studio Team

Bob Chauvin

Subject: Reusing a prior valid value in an input row if the current row is missing a value.
Author: Bob Chauvin
Date: 26 Feb 2008 07:09 PM

So, the template acts like a function to return the first non blank/empty sibling value from <strong>the desired source element</strong>? I want to make sure the third output row's date is pulled from row

So, in the example of the third output row date:

Current date source element is blank ==> prior row date element is blank ==> next prior row date is valid, return this date.

Thank you.

Ivan Pedruzzi

Subject: Reusing a prior valid value in an input row if the current row is missing a value.
Author: Ivan Pedruzzi
Date: 26 Feb 2008 10:35 PM

I see your point, try the following

<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml"/>
<xsl:template match="*">
<xsl:copy>
<xsl:if test="string-length(.) = 0">
<xsl:variable name="name" select="local-name()"/>
<xsl:apply-templates select="preceding::*[count(*)=0 and local-name() = $name and text()][1]/text()"/>
</xsl:if>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>

-------------------------------------------------
input

<data>
<row>
<name>bob</name>
<acct>12</acct>
<date>2007-01-11</date>
</row>
<row>
<name>bob1</name>
<acct></acct>
<date></date>
</row>
<row>
<name></name>
<acct>13</acct>
<date></date>
</row>
<row>
<name></name>
<acct></acct>
<date>2007-01-12</date>
</row>
</data>

-------------------------------------------------
output

<?xml version='1.0' ?>
<data>
<row>
<name>bob</name>
<acct>12</acct>
<date>2007-01-11</date>
</row>
<row>
<name>bob1</name>
<acct>12</acct>
<date>2007-01-11</date>
</row>
<row>
<name>bob1</name>
<acct>13</acct>
<date>2007-01-11</date>
</row>
<row>
<name>bob1</name>
<acct>13</acct>
<date>2007-01-12</date>
</row>
</data>

Ivan Pedruzzi
Stylus Studio Team

Bob Chauvin

Subject: Reusing a prior valid value in an input row if the current row is missing a value.
Author: Bob Chauvin
Date: 28 Feb 2008 10:42 AM

Beautiful! Thanks Ivan.

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