The NETMOD working group has defined the data modeling language
YANG, which can be used to specify network management data models that are manipulated by the NETCONF protocol. The NETMOD working group also defined a number of core data models as basic building blocks.

The purpose of the NETMOD working group is to support the ongoing deployment of YANG by maintaining and evolving the core YANG specifications based on usage experience and developing data models written in YANG that are considered core building blocks and that do not fall into charters of other active IETF working groups (for example a data model for stateless packet filters).

The NETMOD Working Group will produce a maintenance release of the core YANG specification called YANG 1.1, that is a revision of RFC 6020. The changes to RFC 6020 are restricted in the following ways:

- All compliant YANG 1.0 modules must be accepted as compliant YANG 1.1 modules.

- All known ambiguities of YANG 1.0 and all reported defects and errata will be addressed.

- YANG 1.1 is not adding fundamentally new data modeling concepts to the language.

- The changes of the specification will be kept to the minimum necessary to achieve the previously stated goals.

The NETMOD Working Group will also revise the Guidelines for Authors and Reviewers of YANG Data Models (RFC 6087) in order to fix any ambiguities and to incorporate the lessons learned by producing YANG data models.

The NETMOD Working Group will produce a specification how YANG-defined data trees can be represented in JSON.

The NETMOD Working Group will not serve as a review team for YANG modules developed by other working groups. The YANG doctors, organized by the OPS area director responsible for network management, can act as advisors for other working groups and they provide YANG reviews for the OPS area directors [1].

The WG will consult with the NETCONF working group to ensure that NETMOD's decision do not conflict with work in NETCONF.

[1] http://www.ietf.org/iesg/directorate/yang-doctors.html

Goals and Milestones:
  Apr 2014 - Submit first working group draft of the stateless packet filter
             data model
  Apr 2014 - Submit first working group draft of a mapping to JSON
  May 2014 - Compiled issue list to be considered for YANG 1.1
  Jul 2014 - Submit first working group draft of YANG 1.1
  Oct 2014 - Submit stateless packet filter data model to the IESG
  Oct 2014 - Submit the mapping to JSON to the IESG
  Mar 2015 - Submit YANG 1.1 to the IESG