(** GPX validation utilities *)

(** Validation issue representation *)
type validation_issue = {
  level : [`Error | `Warning];
  message : string;
  location : string option;
}

(** Validation result *)
type validation_result = {
  issues : validation_issue list;
  is_valid : bool;
}

(** Validate a complete GPX document *)
val validate_gpx : Doc.t -> validation_result

(** Quick validation - returns true if document is valid *)
val is_valid : Doc.t -> bool

(** Get only error messages *)
val errors : Doc.t -> validation_issue list

(** Get only warning messages *)
val warnings : Doc.t -> validation_issue list

(** Format validation issue for display *)
val format_issue : validation_issue -> string