YANG is a data modeling language for the NETCONF

Netconf

The Network Configuration Protocol, NETCONF, is an IETF network management protocol. It was developed in the NETCONF working group and published in December 2006 as RFC 4741 and later revised in June 2011 and published as RFC 6241....

 network configuration protocol. The YANG data modeling language was developed by the NETMOD working group in the IETF and was published as RFC 6020 in October 2010. The data modeling language can be used to model both configuration data as well as state data of network elements. Furthermore, YANG can be used to define the format of event notifications emitted by network elements and it allows data modelers to define the signature of remote procedure calls that can be invoked on network elements via the NETCONF protocol.

YANG is a modular language representing data structures in an XML

XML

Extensible Markup Language is a set of rules for encoding documents in machine-readable form. It is defined in the XML 1.0 Specification produced by the W3C, and several other related specifications, all gratis open standards....

 tree format. The data modeling language comes with a number of builtin data types. Additional application specific data types can be derived from the builtin data types. More complex reusable data structures can be represented as groupings. YANG data models can use XPATH

XPath

XPath is a language for selecting nodes from an XML document. In addition, XPath may be used to compute values from the content of an XML document...

expressions to define constraints on the elements of a YANG data model.

External links

• MG-SOFT Visual YANG Designer, a user friendly YANG definition file creator/editor/modeler/builder/designer, based on MG-SOFT's own YANG compiler, implemented in Java.
• ChampNMS MasterYANG, MasterYANG is a NETCONF YANG Data Model Designer, Visualizer and Editor.