diff --git a/datafusion/substrait/src/variation_const.rs b/datafusion/substrait/src/variation_const.rs
index 9b34129c68b2..51c0d3b0211e 100644
--- a/datafusion/substrait/src/variation_const.rs
+++ b/datafusion/substrait/src/variation_const.rs
@@ -79,8 +79,17 @@ pub const INTERVAL_MONTH_DAY_NANO_TYPE_REF: u32 = 3;
 
 // For User Defined URLs
 /// For [`DataType::Interval`] with [`IntervalUnit::YearMonth`].
+///
+/// [`DataType::Interval`]: datafusion::arrow::datatypes::DataType::Interval
+/// [`IntervalUnit::YearMonth`]: datafusion::arrow::datatypes::IntervalUnit::YearMonth
 pub const INTERVAL_YEAR_MONTH_TYPE_URL: &str = "interval-year-month";
 /// For [`DataType::Interval`] with [`IntervalUnit::DayTime`].
+///
+/// [`DataType::Interval`]: datafusion::arrow::datatypes::DataType::Interval
+/// [`IntervalUnit::DayTime`]: datafusion::arrow::datatypes::IntervalUnit::DayTime
 pub const INTERVAL_DAY_TIME_TYPE_URL: &str = "interval-day-time";
 /// For [`DataType::Interval`] with [`IntervalUnit::MonthDayNano`].
+///
+/// [`DataType::Interval`]: datafusion::arrow::datatypes::DataType::Interval
+/// [`IntervalUnit::MonthDayNano`]: datafusion::arrow::datatypes::IntervalUnit::MonthDayNano
 pub const INTERVAL_MONTH_DAY_NANO_TYPE_URL: &str = "interval-month-day-nano";