The complete API/ABI diff to the previous release is available at [netopeer.liberouter.org](https://netopeer.liberouter.org/doc/libyang/abidiff/0.11.112-0.12.112.html).
The main features of this release are:
- various bugfixes
- support for YANG extensions (libyang's schema tree structures changed)
- ietf-metadata implemented - support for annotations represented in data as data nodes' attributes
- added possibility to set all the imported modules as implemented
- YANG parser's error messages extended by the path of the invalid node
- nodes, used in `must` and `when` XPath expressions, which are not found in schema are reported as warnings, not errors - refering non-exiting nodes is generally allowed despite it is useless