draft-ietf-netmod-syslog-model-26.txt:
xym 0.4.8:
Extracting 'ietf-syslog@2018-03-15.yang'
   Removed 0 empty lines
Extracting 'example-vendor-syslog-types'
   Getting YANG file name from module name: example-vendor-syslog-types.yang


ietf-syslog@2018-03-15.yang:
pyang 2.3.2: pyang --verbose --ietf -p {libs} {model}:
# module search path: a/www/ietf-ftp/yang/rfcmod/:/a/www/ietf-ftp/yang/draftmod/:/a/www/ietf-ftp/yang/ianamod/:/a/www/ietf-ftp/yang/catalogmod/:.:/var/lib/wwwrun/yang/modules:/a/www/ietf-datatracker/7.21.0/env/share/yang/modules
# read ietf-syslog@2018-03-15.yang (CL)
# read /a/www/ietf-datatracker/7.21.0/env/share/yang/modules/ietf/ietf-inet-types.yang
# read /a/www/ietf-ftp/yang/draftmod/ietf-inet-types@2020-07-06.yang
# read /a/www/ietf-datatracker/7.21.0/env/share/yang/modules/ietf/ietf-interfaces.yang
# read /a/www/ietf-ftp/yang/rfcmod/ietf-interfaces@2018-02-20.yang
# read /a/www/ietf-datatracker/7.21.0/env/share/yang/modules/ietf/ietf-yang-types.yang
# read /a/www/ietf-ftp/yang/draftmod/ietf-yang-types@2020-07-06.yang
# read /a/www/ietf-ftp/yang/draftmod/ietf-tls-client@2020-08-20.yang
# read /a/www/ietf-datatracker/7.21.0/env/share/yang/modules/ietf/ietf-netconf-acm.yang
# read /a/www/ietf-ftp/yang/rfcmod/ietf-netconf-acm@2018-02-14.yang
# read /a/www/ietf-ftp/yang/draftmod/ietf-crypto-types@2020-08-20.yang
# read /a/www/ietf-ftp/yang/draftmod/ietf-truststore@2020-08-20.yang
# read /a/www/ietf-ftp/yang/draftmod/ietf-keystore@2020-08-20.yang
# read /a/www/ietf-ftp/yang/draftmod/ietf-tls-common@2020-08-20.yang
ietf-syslog@2018-03-15.yang:67: warning: RFC 8407: 3.1: The IETF Trust Copyright statement seems to be missing (see pyang --ietf-help for details).
ietf-syslog@2018-03-15.yang:67: warning: the module seems to use RFC 2119 keywords, but the required text from RFC 8174 is not found (see pyang --ietf-help for details).
ietf-syslog@2018-03-15.yang:761: error: grouping "private-key-grouping" not found in module "ietf-keystore"
ietf-syslog@2018-03-15.yang:762: error: grouping "certificate-grouping" not found in module "ietf-keystore"

yanglint SO 1.6.7: yanglint --verbose -p {tmplib} -p {rfclib} -p {draftlib} -p {ianalib} -p {cataloglib} {model} -i:
err : Failed to resolve uses "ks:private-key-grouping". (/ietf-syslog:syslog/actions/remote/destination/signing/cert-signers/cert-signer/cert/ks:private-key-grouping)
err : Failed to resolve uses "ks:certificate-grouping". (/ietf-syslog:syslog/actions/remote/destination/signing/cert-signers/cert-signer/cert/ks:certificate-grouping)
err : Module "ietf-syslog" parsing failed.