Juergen Schoenwaelder <[email protected]> wrote:
> On Mon, Sep 22, 2014 at 05:05:46PM -0400, Jeffrey Haas wrote:
> > Some discussion was given to the filtering considerations. Extending the
> > filtering options of the ietf-inet-types module may be appropriate.
> > [Juergen, is this an action item for yang 1.1?]
>
> The YANG 1.1 issue Y20 is about adding a set of built-in xpath
> functions. I like to ask I2RS to tell us what functions they need. We
> do have IP prefix-length matching on our radar. If other functions are
> required, please let us know as soon as possible.
>
> Now, this mostly is about the xpath function set that can be used in
> must and when expressions. You probably want to use them also in
> filtering expressions in the protocol. This is where things again
> become a protocol issues. Note that RFC 6241 says on page 17:
>
> The XPath expression is interpreted in the following context:
>
> [...]
>
> * The function library is the core function library.
The quoted text is for the error-path. For the filter, rfc 6241 says
(p 67):
o The function library is the core function library, plus any
functions defined by the data model.
/martin
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