The ymlfront directive is supplied by the ymlfront plugin.

This directive allows the user to define arbitrary meta-data in YAML format.

[[!ymlfront  data="""
 foo: fooness
 bar: The Royal Pigeon
 baz: 2
 """]]

There is one argument to this directive.

• data: The YAML-format data. This should be enclosed inside triple-quotes to preserve the data correctly.

If more than one ymlfront directive is given per page, the result is undefined. Likewise, it is inadvisable to try to mix the non-directive ymlfront format with the directive form of the data.