A tag directive specifies a shorthand notation for specifying _tags.
Each tag directive associates a handle with a prefix. This allows for
compact tag notation.
Each handle specified MUST start and end with a '!' character
(a single character "!" handle is allowed as well).
Only alphanumeric characters, '-', and '__' may be used in handles.
Each prefix MUST not be empty.
The "!!" handle is used for default YAML _tags with prefix
"tag:yaml.org,2002:". This can be overridden.
Specify tag directives.
A tag directive specifies a shorthand notation for specifying _tags. Each tag directive associates a handle with a prefix. This allows for compact tag notation.
Each handle specified MUST start and end with a '!' character (a single character "!" handle is allowed as well).
Only alphanumeric characters, '-', and '__' may be used in handles.
Each prefix MUST not be empty.
The "!!" handle is used for default YAML _tags with prefix "tag:yaml.org,2002:". This can be overridden.