docs: add specified_by_url for Duration
@@ -6,7 +6,7 @@ use crate::{InputValueError, InputValueResult, Scalar, ScalarType, Value};
/// Implement the Duration scalar
///
/// The input/output is a string in ISO8601 format.
-#[Scalar(internal, name = "Duration")]
+#[Scalar(internal, name = "Duration", specified_by_url = "https://en.wikipedia.org/wiki/ISO_8601#Durations")]
impl ScalarType for Duration {
fn parse(value: Value) -> InputValueResult<Self> {
match &value {
