storing two xslt variables in 1 xslt variable

Question

I need help where I can store two xslt variables in 1 array like variable to be used later

    <xsl:variable name="edgeDeviceArray">
        <Item><xsl:value-of select="$edgeDev1" /></Item>
        <Item><xsl:value-of select="$edgeDev2" /></Item>
    </xsl:variable>

But the output of the above seems to be concatenation. I would like to refer later like edgeDeviceArray[1]...

Here is a (non-working) fragment of my stylesheet demonstrating what I am trying to do

    <xsl:variable name="edgeDev1"
        select="$deviceDoc/x:config/t:devices/t:device[t:address=$edgeDev1IP]/t:name" />
    <xsl:variable name="edgeDev2"
        select="$deviceDoc/x:config/t:devices/t:device[t:address=$edgeDev2IP]/t:name" />
    <xsl:variable name="xrSet" select="$xrDeviceDoc/x:config/t:devices/t:device-module/t:devices" />

    <xsl:for-each select="$xrSet">
      <xsl:variable name="asideDoc"
          select="document(concat($edgeDevice[position()], '.xml'))" />
    </xsl:for-each>

Here, I am reading the devices names from 1 doc based on certain attributes if they match.

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
    xmlns:t="http://tail-f.com/ns/ncs"
    xmlns:x="http://tail-f.com/ns/config/1.0" 
    xmlns:y="http://tail-f.com/ned/alu-sr"
    xmlns:a="http://tail-f.com/ned/cisco-ios-xr"
    xmlns:m="http://mask.data"
    xmlns:im="http://inverse-mask.data" exclude-result-prefixes="xsl t x y"
    xmlns:exsl="http://exslt.org/common" extension-element-prefixes="exsl">

  <xsl:output method="xml" version="1.0" encoding="UTF-8"
      indent="yes" omit-xml-declaration="yes" />

  <xsl:template match="/">
    <xsl:variable name="deviceDoc" select="document('devices.xml')" />
    <xsl:variable name="edgeDev1IP"
        select="../y:sdp[y:sdp-id=$sdpSet[1]]/y:far-end" />
    <xsl:variable name="edgeDev1"
        select="$deviceDoc/x:config/t:devices/t:device[t:address=$edgeDev1IP]/t:name" />
    <xsl:variable name="edgeDev2IP"
        select="../y:sdp[y:sdp-id=$sdpSet[2]]/y:far-end" />
    <xsl:variable name="edgeDev2"
        select="$deviceDoc/x:config/t:devices/t:device[t:address=$edgeDev2IP]/t:name" />
    <xsl:variable name="xrDeviceDoc" select="document('xrDevices.xml')" />
    <xsl:variable name="xrSet"
        select="$xrDeviceDoc/x:config/t:devices/t:device-module/t:devices" />
    <xsl:variable name="edgeDeviceArray">
      <item><xsl:value-of select="$edgeDev1" /></item>
      <item><xsl:value-of select="$edgeDev2" /></item>
    </xsl:variable> 

    <anurag><xsl:value-of select="exsl:node-set($edgeDeviceArray)/item[1]" /></anurag>
  </xsl:template>
</xsl:stylesheet>

You cannot do this in XSLT 1.0 without extensions, though you can get a close approximation if the two variables' values are node sets of one node each. If you explain the purpose for which you wanted it, then perhaps we can suggest a better approach. — John Bollinger
– John Bollinger, Commented May 31, 2017 at 14:04
I have a loop where I want to refer the above devices and thats why I want to put them in some reference. I am reading the devices from different xml files and I store them in these two variables. — Anurag
– Anurag, Commented May 31, 2017 at 14:08
Thanks, @Anurag, but in order to help you, I think we are going to need to see a minimal reproducible example demonstrating the problem. — John Bollinger
– John Bollinger, Commented May 31, 2017 at 14:10

michael.hor257k · Accepted Answer · 2017-05-31 14:20:38Z

1

I would like to refer later like edgeDeviceArray[1]

That won't work for two reasons:

There's only one edgeDeviceArray. In order to refer to its first item, you would need to use something like $edgeDeviceArray/item[1];
In XSLT 1.0, your variable is a result tree fragment, and must be converted to a node-set before its contents can be addressed by XPath.

Here's a minimized example:

XSLT 1.0

<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:exsl="http://exslt.org/common"
extension-element-prefixes="exsl">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>

<xsl:variable name="myVar">
    <item>A</item>
    <item>B</item>
</xsl:variable> 

<xsl:template match="/">
    <result>
        <xsl:value-of select="exsl:node-set($myVar)/item[2]"/>
    </result>
</xsl:template>

</xsl:stylesheet>

Result

<?xml version="1.0" encoding="UTF-8"?>
<result>B</result>

answered May 31, 2017 at 14:20

michael.hor257k

118k6 gold badges36 silver badges55 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

Anurag Over a year ago

<xsl:variable name="edgeDeviceArray"> <Item><xsl:value-of select="$edgeDev1" /></Item> <Item><xsl:value-of select="$edgeDev2" /></Item> </xsl:variable> <anurag><xsl:value-of select="exsl:node-set($edgeDeviceArray)/Item[1]" /></anurag>

Anurag Over a year ago

Did U mean the above? I can't put template match as it is there outside. I am always getting empty output

michael.hor257k Over a year ago

@Anurag I am afraid I cannot help you with code that I cannot reproduce.

michael.hor257k Over a year ago

@Anurag My answer stands. <xsl:value-of select="exsl:node-set($edgeDeviceArray)/Item[1]" /> should return the same as <xsl:value-of select="$edgeDev1" />.

Collectives™ on Stack Overflow

storing two xslt variables in 1 xslt variable

1 Answer 1

4 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Related