Re: [Netconf] about subtree filtering

[WashamFan <Washam.Fan at huaweisymantec.com>]

Hi,

----- Original Message -----
From: Martin Bjorklund <mbj at tail-f.com>
Date: Friday, June 26, 2009 7:19 pm
Subject: Re: [Netconf] about subtree filtering
To: Washam.Fan at huaweisymantec.com
Cc: andy at netconfcentral.com, netconf at ietf.org


> WashamFan <Washam.Fan at huaweisymantec.com> wrote:
> > Well, the data model might like this:
> > 
> >    container users {
> >      list user {
> >        container basic {
> >           leaf name { ...}
> >           leaf type {...}
> >           leaf full-name { ... }
> >        }
> >        leaf role { ... }
> >      }
> >    }
> > 
> > So, the filter
> > 
> >    <users>
> >       <user>
> >         <basic>
> >            <name>fred</name>
> >            <type/>
> >            <full-name/>
> >         </basic>
> >         <role/>
> >       </user>
> >     </users>
> > 
> > will help return what I want?
> 
> Assuming this is config, the data model is not quite correct - the
> list lacks a key.  So if we do:
> 
>     container users {
>       list user {
>         key name;
>         leaf name { ...}
>         container basic {
>            leaf type {...}
>            leaf full-name { ... }
>         }
>         leaf role { ... }
>       }
>     }
> 
> Then the filter:
> 
>     <users>
>        <user>
>          <name>fred</name>
>          <basic>
>             <type/>
>             <full-name/>
>          </basic>
>          <role/>
>        </user>
>      </users>
> 
> will return the type, full-name, and role of "fred", if they exist,
> which is what you want.
> 
> However, the filter:
> 
>     <users>
>        <user>
>          <basic>
>             <type/>
>             <full-name>Fred Flintstone</full-name>
>          </basic>
>          <role/>
>        </user>
>      </users>
> 
> will return the role of *all* users, and the type of Fred.

So, <role> is only constrained by the key, but not the 
siblings. What if <role> is under a container:

   container owner {
     container basic {
       leaf name { ... }
       leaf type { ... }
       leaf full-name { ... }
     }
     leaf role { ... }
   }

When the belowing filter is applied:

   <owner>
     <basic>
       <name>fred</name>
       <type/>
       <full-name/>
     </basic>
     <role/>
   </owner>

If the current owner is fred, the name, type, full-name as well as
role (if exists) of fred would be returned, right?
If the current owner is fan, the name, type, full-name of
fan would not be returned, but would the role of fan be returned?

washam