The IESG has approved the following document: - 'Extending YANG with Language Abstractions' (draft-linowski-netmod-yang-abstract-05.txt) as an Experimental RFC This document has been reviewed in the IETF but is not the product of an IETF Working Group. The IESG contact person is Dan Romascanu. A URL of this Internet Draft is: http://datatracker.ietf.org/doc/draft-linowski-netmod-yang-abstract/ Technical Summary YANG - the NETCONF Data Modeling Language - supports modeling of a tree of data elements that represent the configuration and runtime status of a particular network element managed via NETCONF. The document defines extensions for the modeling language YANG as new language statements, which introduce language abstractions to improve the model extensibility and reuse. A model example from an actual network management system is given to highlight the value of proposed language extensions, especially class inheritance and recursiveness. The draft introduces object-oriented language features like class inheritance and recursiveness and enables high-level modeling and mapping of YANG models seamlessly to available information models like TM Forum SID. As such the draft can enable easy adoption of YANG language and YANG standard moduls by other SDOs (using UML as modeling language) as well as using industry information models as a basis for further detailed modeling and YANG module development. Working Group Summary The draft has been originally submitted as an individual draft to the NETMOD WG addressing the gap for language abstractions noted in NETMOD WG charter as an area of future work. After finalizing YANG language specification the NETMOD WG decided to focus on YANG module development rather than starting additional work for language extensions. Based on the feedback of the WG the draft specifies valuable extensions to the YANG language, thus WG members proposed to publish the document as an Experimental RFC. The draft might become a candidate for proposed standard once an IETF WG starts working on an update of the YANG language specification as YANG 2.0. Document Quality Several YANG experts from NETMOD WG and one expert from IPFIX WG reviewed different versions of the draft. The document has been reviewed by the editor of the YANG language specification Martin Bjorlund to make sure the defined YANG extensions do not conflict with the YANG language. The language extensions defined in the document have been implemented with two open source tools with different code base. These tools have been used to validate the model examples through the document. Personnel Mehmet Ersue is the Document Shepherd for this document. Dan Romascanu is the Responsible Area Director. RFC Editor Note Abstract: OLD: memo suggests to enhance NEW: memo suggests enhancing Section 1: OLD: After successful usage this experimental specification can be republished at IETF as a proposed standard possibly as part of a future version of YANG. NEW: If this experimental specification results in successful usage, it is possible that the language extension defined herein could be updated to incorporate implementation and deployment experience, then pursued on the standards track, perhaps as part of a future version of YANG. Section 1.2: OLD: 1.2. Motivation NEW: 1.2. Motivation Following are non-exhaustive motivation examples highlighting usage scenarios for language abstractions. OLD: (e.g. TM Forum SID) NEW: (e.g. TM Forum SID [SID V8]) Section 2.9: OLD: <CODE BEGINS> file "ietf-complex-types@2010-10-05.yang" NEW: <CODE BEGINS> file "ietf-complex-types@2010-12-10.yang" OLD: "Editor: Bernd Linowski <bernd.linowski@ext.nsn.com> NEW: "Editor: Bernd Linowski <bernd.linowski.ext@nsn.com> Section 4: OLD: Registrant Contact: See the 'Author's Addresses' section of this document. NEW: Registrant Contact: Bernd Linowski (bernd.linowski.ext@nsn.com) Mehmet Ersue (mehmet.ersue@nsn.com) Siarhei Kuryla (s.kuryla@gmail.com) Authors' Addresses: OLD: EMail: bernd.linowski@ext.nsn.com NEW: EMail: bernd.linowski.ext@nsn.com _______________________________________________ IETF-Announce mailing list IETF-Announce@ietf.org https://www.ietf.org/mailman/listinfo/ietf-announce
