ocrd >= 3.3.1
lxml
langcodes >= 3.4.0, < 3.5.0 ; python_version>"3.7"
langcodes[data] >= 3.1.0, < 3.5.0 ; python_version<="3.7"
language_data < 1.3.0 ; python_version<"3.9"
packaging
