Re: [netmod] Clarification about subtree filtering

[Alex Campbell]

Hi,


Since nobody else has answered I'll have a go.

I'm not familiar with subtree filtering, but I am with XPath. Assuming your 
XPath translation is accurate, it will return no data (response A).


________________________________
From: netmod <netmod-boun...@ietf.org> on behalf of Shiva Kumar Pathori 
<path...@gmail.com>
Sent: Tuesday, 22 May 2018 8:38 p.m.
To: netmod@ietf.org
Subject: [netmod] Clarification about subtree filtering


Hi,
Can somebody clarify what could be the response for the <get-config> operation 
provided below.

Following is the user information in the datastore that is provided in the RFC 
6241 as example.
<rpc message-id="101"
          xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
       <get-config>
         <source>
           <running/>
         </source>
         <filter type="subtree">
           <top xmlns="http://example.com/schema/1.2/config";>
             <users/>
           </top>
         </filter>
       </get-config>
     </rpc>

<rpc-reply message-id="101" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
  <data>
    <top xmlns="http://example.com/schema/1.2/config";>
      <users>
        <user>
          <name>root</name>
          <type>superuser</type>
          <full-name>Charlie Root</full-name>
          <company-info>
            <dept>1</dept>
            <id>1</id>
          </company-info>
        </user>
        <user>
          <name>fred</name>
          <type>admin</type>
          <full-name>Fred Flintstone</full-name>
          <company-info>
            <dept>2</dept>
            <id>2</id>
          </company-info>
        </user>
        <user>
          <name>barney</name>
          <type>admin</type>
          <full-name>Barney Rubble</full-name>
          <company-info>
            <dept>2</dept>
            <id>3</id>
          </company-info>
        </user>
      </users>
    </top>
  </data>
</rpc-reply>


The <get-config> operation with content-match at parent and child nodes;

<rpc message-id="101" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
  <get-config>
    <source>
      <running/>
    </source>
    <filter type="subtree">
      <top xmlns="http://example.com/schema/1.2/config";>
        <users>
          <user>
            <type>admin</name>
            <company-info>
              <dept>1</dept>
            </company-info>
          </user>
        </users>
      </top>
    </filter>
  </get-config>
</rpc>

The equivalent XPATH expression :
<rpc message-id="101" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
  <get-config>
    <source>
      <running/>
    </source>
    <filter xmlns:t="http://example.com/schema/1.2/config";
                 type="xpath"
                 
select="/t:top/t:users/t:user[t:type='admin']/t:company-info[t:dept='1']"/>
        </get-config>
     </rpc>

For this what could be the response

a) The response based on content-match nodes are AND-ed together
<rpc-reply message-id="101" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
       <data>
      </data>
     </rpc-reply>
OR

b)  The response based on content-match nodes treated separately
<rpc-reply message-id="101" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
  <data>
    <top xmlns="http://example.com/schema/1.2/config";>
      <users>
        <user>
          <name>fred</name>
          <type>admin</type>
          <full-name>Fred Flintstone</full-name>
        </user>
        <user>
          <name>barney</name>
          <type>admin</type>
          <full-name>Barney Rubble</full-name>
        </user>
      </users>
    </top>
  </data>
</rpc-reply>

Regards,
Shiva




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