How is a path parameter denoted in RAML paths?

• A. Using curly braces, e.g., /{flight_id}
• B. Using square brackets, e.g., /[flight_id]
• C. Using angle brackets, e.g., /<flight_id>
• D. Using parentheses, e.g., /(flight_id)

Answer: (A)

In RAML, dynamic parts of a path are defined using curly braces to mark a path parameter. Wrapping the parameter name in braces, as in /{flight_id}, signals that this segment will be supplied by the client at runtime. This parameter can then be described in the URI Parameters section with its type, description, and whether it is required. The braces are the RAML convention for path parameters, so alternatives like /[flight_id], /, or /(flight_id) do not denote a variable path segment.