Greetings,

I'm having problems with some logic and I was curious if someone could straighten me out... What I'm trying to do is run a check to see if extra NTP servers are configured other than my two primary servers. 1.1.1.1 is the rogue device in this case. If I see that there are NTP servers configured over and above my standard servers I generate an error message. Here is the XML source that I'm running my XSLT against:

    <configuration junos:changed-seconds="1194721954" junos:changed-localtime="2007-11-10 13:12:34 CST">
        <system>
            <ntp>
                <junos:comment>/* NTP Servers */</junos:comment>
                <boot-server>10.60.49.21</boot-server>
                <server>
                    <name>10.60.49.21</name>
                    <prefer/>
                </server>
                <server>
                    <name>10.60.48.248</name>
                </server>
                <server>
                    <name>1.1.1.1</name>
                </server>
                <source-address>10.87.11.220</source-address>
            </ntp>
        </system>
    </configuration>

Here is the logic that I know is jacked up in my XSLT:

<xsl:for-each select="system/ntp/server">
   <xsl:variable name="server-name" select='name'/>
   <xsl:if test="$server-name!='10.60.48.248' or $server-name!='10.60.49.21'">

   </xsl:if>
</xsl:for-each>

You can see what I'm trying to test against is if the $server-name variable does not equal either of my valid ntp servers then I call my error. The problem is that the way that I have my logic laid out in the for loop it is always going to come back true even if everything is correct. Any ideas for restructuring my logic so that I can achieve the desired behavior? BTW, I'm calling a template in the full script to reference everything at /configuration. That is why it isn't referenced in my for loop.

Thanks,

Randy

When X is a node-set, X!=b is true if at least one X is not equal to b. You want not(X=b), which is true if there is no X that is equal to b.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

Michael,

Thank you very much for the quick response. Are you saying I should try something like:

  <xsl:if test="not($server-name='10.60.48.248' or '10.60.49.21'">

I'm pretty confident that I had tried that, but I think my syntax was screwed up. Am I missing something obvious? I can make my XSLT work fine if I'm only testing against one "server", when I test against two that is when the "operator-malfunction" ;) errors start manifesting themselves.

No, XPath doesn't allow (A = B or C). You can write this as (A=B or A=C), or in XPath 2.0 you can write it as (A=(B, C)).

Also, not(X or Y) can be written as (not(X) and not(Y)).

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference