/usr/share/yuma/modules/ietf/ is in libyuma-base 2.10-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/yuma/modules/ietf-draft/ietf-direct-must-augment-extension@2015-06-12.yang
/usr/share/yuma/modules/ietf-draft/ietf-network-topology@2016-11-30.yang
/usr/share/yuma/modules/ietf-draft/ietf-network@2016-11-30.yang
/usr/share/yuma/modules/ietf/iana-crypt-hash.yang
/usr/share/yuma/modules/ietf/iana-if-type.yang
/usr/share/yuma/modules/ietf/ietf-inet-types.yang
/usr/share/yuma/modules/ietf/ietf-inet-types@2010-09-24.yang
/usr/share/yuma/modules/ietf/ietf-interfaces.yang
/usr/share/yuma/modules/ietf/ietf-ip.yang
/usr/share/yuma/modules/ietf/ietf-netconf-acm.yang
/usr/share/yuma/modules/ietf/ietf-netconf-monitoring.yang
/usr/share/yuma/modules/ietf/ietf-netconf-notifications.yang
/usr/share/yuma/modules/ietf/ietf-netconf-partial-lock.yang
/usr/share/yuma/modules/ietf/ietf-netconf-with-defaults.yang
/usr/share/yuma/modules/ietf/ietf-netconf.yang
/usr/share/yuma/modules/ietf/ietf-system.yang
/usr/share/yuma/modules/ietf/ietf-yang-library.yang
/usr/share/yuma/modules/ietf/ietf-yang-smiv2.yang
/usr/share/yuma/modules/ietf/ietf-yang-types.yang
/usr/share/yuma/modules/ietf/ietf-yang-types@2010-09-24.yang
/usr/share/yuma/modules/ietf/nc-notifications.yang
/usr/share/yuma/modules/ietf/notifications.yang