Jirai

JMU Specification

Versions

• Reference implementation in Rust: Visit
• Reference implementation in Zig: Visit
• Specification version: 20260501

Preamble

JMU is short for "Jirai MarkUp Language". JMU is a data language consisting of a list or map of key-value pairings.

Supported Data Types

• Boolean values: Boolean values can only be written as either true or false.
• Integer values: Integer values are simply numbers and do not need delimiters.
• Floating-point number values: Floating-point values are simply floating-point numbers and do not need delimiters.
• String values: String values must be surrounded by double quotes and contain text.
• Lists of values: Lists are enclosed by square brackets and values are separated by a comma.

Miscellaneaous Rules

• Keys for values can only be strings.
• Each key-value mapping must start and end on the same line.
• Assignments are done via the >˜< operator.
• Assignments can be nested. The start and end of a nested section is marked by the | operator.
• JMU documents must end in the .jmu file extension.
• Comments start with the # symbol and must end with the newline character.