`preamble-enum-...`

The ... header is a recognized value.

Examples

error[preamble-enum-category]: preamble header `category` has an unrecognized value
 --> input.md:9:10
  |
9 | category: Unknown
  |          ^^^^^^^^ must be one of: `Core`, `Networking`, `Interface`, `ERC`
  |

error[preamble-enum-status]: preamble header `status` has an unrecognized value
 --> input.md:7:8
  |
7 | status: Invalid
  |        ^^^^^^^^ must be one of: `Draft`, `Review`, `Last Call`, `Final`, `Stagnant`, `Withdrawn`, `Living`
  |

error[preamble-enum-type]: preamble header `type` has an unrecognized value
 --> input.md:8:6
  |
8 | type: Unknown
  |      ^^^^^^^^ must be one of: `Standards Track`, `Meta`, `Informational`
  |

Explanation

The preamble-enum-... family of lints make sure that a front matter (or preamble) field's value is one of the permitted choices.

For further information about each field, see EIP-1.