Jernej Tuljak <jernej.tul...@mg-soft.si> writes:
> Hi,
>
> current text in 6087bis-04 (Section 5.6.4):
>
> XPath expressions for 'when' statements SHOULD NOT reference the
> context node or any descendant nodes of the context node. They MAY
> reference descendant nodes if the 'when' statement is contained
> within an 'augment' statement, and the referenced nodes are not
> defined within the 'augment' statement.
>
> This is OK. But the text never mentions an analogous case, which is when
> a when-stmt is defined for a uses-stmt. I think this should be
> corrected. Note that finding the initial context node for the expression
> uses an algorithm that is virtually equal to the 'augment' case (first
> data node ancestor), therefore the first sentence in the above text
> discourages use of 'when' statements within a 'uses' statement, which I
> don't think was the intention.
>
> grouping special-params {
> leaf param1 {
> type string;
> }
> leaf param2 {
> type string;
> }
> }
>
> container foo {
> leaf enable-special {
> type boolean;
> }
> uses special-params {
> when "enable-special = 'true'";
> }
> }
>
> In my example the expression references a descendant of the initial
> context node, which should be OK. What would be problematic is
> referencing descendants that are defined in the grouping.
>
> OLD:
>
> XPath expressions for 'when' statements SHOULD NOT reference the
> context node or any descendant nodes of the context node. They MAY
> reference descendant nodes if the 'when' statement is contained
> within an 'augment' statement, and the referenced nodes are not
> defined within the 'augment' statement.
>
> NEW:
>
> XPath expressions for 'when' statements SHOULD NOT reference the
> context node or any descendant nodes of the context node. They MAY
> reference descendant nodes if the 'when' statement is contained
> within an 'augment' statement, and the referenced nodes are not
> defined within the 'augment' statement. They MAY also reference
> descendant nodes if the 'when' statement is contained within a
> 'uses' statement, and the referenced nodes are not defined within
> the 'grouping' statement being referred to by the 'uses' statement.
>
+1
Lada
> Or something similar.
>
> Jernej
>
>
> internet-dra...@ietf.org je 6.7.2015 ob 19:14 napisal:
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>> This draft is a work item of the NETCONF Data Modeling Language Working
>> Group of the IETF.
>>
>> Title : Guidelines for Authors and Reviewers of YANG Data
>> Model Documents
>> Author : Andy Bierman
>> Filename : draft-ietf-netmod-rfc6087bis-04.txt
>> Pages : 52
>> Date : 2015-07-06
>>
>> Abstract:
>> This memo provides guidelines for authors and reviewers of Standards
>> Track specifications containing YANG data model modules. Applicable
>> portions may be used as a basis for reviews of other YANG data model
>> documents. Recommendations and procedures are defined, which are
>> intended to increase interoperability and usability of Network
>> Configuration Protocol (NETCONF) implementations that utilize YANG
>> data model modules.
>>
>>
>> The IETF datatracker status page for this draft is:
>> https://datatracker.ietf.org/doc/draft-ietf-netmod-rfc6087bis/
>>
>> There's also a htmlized version available at:
>> https://tools.ietf.org/html/draft-ietf-netmod-rfc6087bis-04
>>
>> A diff from the previous version is available at:
>> https://www.ietf.org/rfcdiff?url2=draft-ietf-netmod-rfc6087bis-04
>>
>>
>> Please note that it may take a couple of minutes from the time of submission
>> until the htmlized version and diff are available at tools.ietf.org.
>>
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/
>>
>> _______________________________________________
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>> https://www.ietf.org/mailman/listinfo/netmod
>>
>
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