diff --git a/hugr-core/src/ops.rs b/hugr-core/src/ops.rs
index 480db67ad..f44bfd136 100644
--- a/hugr-core/src/ops.rs
+++ b/hugr-core/src/ops.rs
@@ -23,7 +23,8 @@ pub use constant::{Const, Value};
 pub use controlflow::{BasicBlock, Case, Conditional, DataflowBlock, ExitBlock, TailLoop, CFG};
 pub use custom::CustomOp;
 pub use dataflow::{
-    Call, CallIndirect, DataflowParent, Input, LoadConstant, LoadFunction, Output, DFG,
+    Call, CallIndirect, DataflowOpTrait, DataflowParent, Input, LoadConstant, LoadFunction, Output,
+    DFG,
 };
 pub use leaf::{Lift, MakeTuple, Noop, Tag, UnpackTuple};
 pub use module::{AliasDecl, AliasDefn, FuncDecl, FuncDefn, Module};
diff --git a/hugr-core/src/ops/dataflow.rs b/hugr-core/src/ops/dataflow.rs
index 54202ffc0..4f90faedf 100644
--- a/hugr-core/src/ops/dataflow.rs
+++ b/hugr-core/src/ops/dataflow.rs
@@ -10,9 +10,15 @@ use crate::IncomingPort;
 #[cfg(test)]
 use ::proptest_derive::Arbitrary;
 
-pub(crate) trait DataflowOpTrait {
+/// Trait implemented by all dataflow operations.
+pub trait DataflowOpTrait {
+    /// Tag identifying the operation.
     const TAG: OpTag;
+
+    /// A human-readable description of the operation.
     fn description(&self) -> &str;
+
+    /// The signature of the operation.
     fn signature(&self) -> FunctionType;
 
     /// The edge kind for the non-dataflow or constant inputs of the operation,