Hi, I added a new issue in github about open vs. closed systems
https://github.com/netmod-wg/rfc6087bis/issues/32 Andy On Mon, Mar 28, 2016 at 12:59 PM, William Ivory <[email protected]> wrote: > Hi Andy, > > > > Thanks. So if we have a tightly controlled set of YANG files, and > restrict usage to a specific use case where we have a set of nodes across > multiple modules with the same name, we should be fine. > > > > William > > > > *From:* Andy Bierman [mailto:[email protected]] > *Sent:* 28 March 2016 20:51 > *To:* William Ivory <[email protected]> > *Cc:* [email protected] > *Subject:* Re: [netmod] Query about usage of local-name() in YANG XPATH > expressions > > > > Hi, > > > > This was raised as a concern by Lada (see netmod WG email arourd July 2014) > > > > The issue is that the expression breaks module containment and will match > > depending on what other YANG modules are known to the YANG compiler. > > > > > > Andy > > > > > > > > On Sat, Mar 26, 2016 at 3:08 AM, William Ivory <[email protected]> wrote: > > Hi, > > > > From RFC 6087 (YANG Usage Guidelines), section 5.6.2, the following is > noted about the use of the XPATH local-name() function: > > > > The 'local-name' function SHOULD NOT be used to reference local names > > outside of the YANG module defining the must or when expression > > containing the 'local-name' function. Example of a local-name > > function that should not be used: > > > > /*[local-name()='foo'] > > > > However, no explanation is given as to why this is a bad idea. We have a > specific use case where local-name() would appear to allow us to massively > simplify some rather cumbersome must expressions, but I wanted to check I’m > not missing some ‘gotcha’ here. Is it simply that relying on a common node > name across multiple modules is generally a bad design as it ties the > modules together, or is there more to it? If so, then in our case this is > a reasonable restriction. > > > > Thanks, > > > > William > > > > > _______________________________________________ > netmod mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/netmod > <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_netmod&d=CwMFaQ&c=IL_XqQWOjubgfqINi2jTzg&r=GByLeg9jZvOv_AlgBo9uvdDrxizlOR7l_SnTXowyJU8&m=VZGB2NkaE9--68moPlgZM_ag1CgKvjJqSwwZ2iw1gio&s=7Ju95XbNKdlg4tPZG9ahSeMHUT_lqGFPtiZxcXevTxw&e=> > > >
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