diff --git a/packages/rstream-graph/src/api.ts b/packages/rstream-graph/src/api.ts
index a0ac852bfe..4c3ba3879a 100644
--- a/packages/rstream-graph/src/api.ts
+++ b/packages/rstream-graph/src/api.ts
@@ -2,7 +2,7 @@ import { ISubscribable } from "@thi.ng/rstream/api";
 import { Transducer } from "@thi.ng/transducers/api";
 import { IObjectOf } from "@thi.ng/api/api";
 
-export type MultiInputNodeFn<T> = (src: ISubscribable<any>[]) => ISubscribable<T>;
+export type NodeFactory<T> = (src: ISubscribable<any>[], id: string) => ISubscribable<T>;
 
 /**
  * A dataflow graph spec is simply an object where keys are node names
@@ -22,7 +22,7 @@ export type GraphSpec = IObjectOf<NodeSpec>;
  * See `initGraph` and `nodeFromSpec` for more details (in /src/nodes.ts)
  */
 export interface NodeSpec {
-    fn: (src: ISubscribable<any>[]) => ISubscribable<any>;
+    fn: NodeFactory<any>;
     ins: NodeInput[];
     out?: NodeOutput;
 }
diff --git a/packages/rstream-graph/src/graph.ts b/packages/rstream-graph/src/graph.ts
index 4c3b732dc2..9fa884851a 100644
--- a/packages/rstream-graph/src/graph.ts
+++ b/packages/rstream-graph/src/graph.ts
@@ -10,7 +10,7 @@ import { sync, StreamSync } from "@thi.ng/rstream/stream-sync";
 import { Subscription } from "@thi.ng/rstream/subscription";
 import { Transducer } from "@thi.ng/transducers/api";
 
-import { NodeSpec } from "./api";
+import { NodeSpec, NodeFactory } from "./api";
 
 /**
  * Dataflow graph initialization function. Takes an object of
@@ -23,8 +23,8 @@ import { NodeSpec } from "./api";
  * @param nodes
  */
 export const initGraph = (state: IAtom<any>, nodes: IObjectOf<NodeSpec>): IObjectOf<ISubscribable<any>> => {
-    for (let k in nodes) {
-        (<any>nodes)[k] = nodeFromSpec(state, nodes[k]);
+    for (let id in nodes) {
+        (<any>nodes)[id] = nodeFromSpec(state, nodes[id], id);
     }
     return resolveMap(nodes);
 };
@@ -43,7 +43,7 @@ export const initGraph = (state: IAtom<any>, nodes: IObjectOf<NodeSpec>): IObjec
  *
  * @param spec
  */
-const nodeFromSpec = (state: IAtom<any>, spec: NodeSpec) => (resolve) => {
+const nodeFromSpec = (state: IAtom<any>, spec: NodeSpec, id: string) => (resolve) => {
     const src: ISubscribable<any>[] = [];
     for (let i of spec.ins) {
         let s;
@@ -63,10 +63,10 @@ const nodeFromSpec = (state: IAtom<any>, spec: NodeSpec) => (resolve) => {
         }
         src.push(s);
     }
-    const node = spec.fn(src);
+    const node = spec.fn(src, id);
     if (spec.out) {
         if (isString(spec.out)) {
-            ((path) => node.subscribe({ next: (x) => state.resetIn(path, x) }))(spec.out);
+            ((path) => node.subscribe({ next: (x) => state.resetIn(path, x) }, `out-${id}`))(spec.out);
         } else {
             spec.out(node);
         }
@@ -75,7 +75,7 @@ const nodeFromSpec = (state: IAtom<any>, spec: NodeSpec) => (resolve) => {
 };
 
 export const addNode = (graph: IObjectOf<ISubscribable<any>>, state: IAtom<any>, id: string, spec: NodeSpec) =>
-    graph[id] = nodeFromSpec(state, spec)((nodeID) => graph[nodeID]);
+    graph[id] = nodeFromSpec(state, spec, id)((nodeID) => graph[nodeID]);
 
 export const removeNode = (graph: IObjectOf<ISubscribable<any>>, id: string) => {
     if (graph[id]) {
@@ -94,12 +94,12 @@ export const removeNode = (graph: IObjectOf<ISubscribable<any>>, id: string) =>
  * @param xform
  * @param arity
  */
-export const node = (xform: Transducer<IObjectOf<any>, any>, arity?: number) =>
-    (src: ISubscribable<any>[]): StreamSync<any, any> => {
+export const node = (xform: Transducer<IObjectOf<any>, any>, arity?: number): NodeFactory<any> =>
+    (src: ISubscribable<any>[], id: string): StreamSync<any, any> => {
         if (arity !== undefined && src.length !== arity) {
             illegalArgs(`wrong number of inputs: got ${src.length}, but needed ${arity}`);
         }
-        return sync({ src, xform, reset: false });
+        return sync({ src, xform, reset: false, id });
     };
 
 /**
@@ -107,5 +107,5 @@ export const node = (xform: Transducer<IObjectOf<any>, any>, arity?: number) =>
  *
  * @param xform
  */
-export const node1 = (xform: Transducer<any, any>) =>
-    ([src]: ISubscribable<any>[]): Subscription<any, any> => src.subscribe(xform);
+export const node1 = (xform: Transducer<any, any>): NodeFactory<any> =>
+    ([src]: ISubscribable<any>[], id: string): Subscription<any, any> => src.subscribe(xform, id);
diff --git a/packages/rstream-graph/src/nodes/extract.ts b/packages/rstream-graph/src/nodes/extract.ts
index 7a488f74e3..d12f2074c9 100644
--- a/packages/rstream-graph/src/nodes/extract.ts
+++ b/packages/rstream-graph/src/nodes/extract.ts
@@ -1,7 +1,7 @@
 import { Path, getIn } from "@thi.ng/paths";
 import { map } from "@thi.ng/transducers/xform/map";
 
-import { MultiInputNodeFn } from "../api";
+import { NodeFactory } from "../api";
 import { node1 } from "../graph";
 
 /**
@@ -9,5 +9,5 @@ import { node1 } from "../graph";
  *
  * Inputs: 1
  */
-export const extract = (path: Path): MultiInputNodeFn<any> =>
+export const extract = (path: Path): NodeFactory<any> =>
     node1(map((x) => getIn(x, path)));
diff --git a/packages/rstream-graph/src/nodes/math.ts b/packages/rstream-graph/src/nodes/math.ts
index 5fbd00c2cc..041b2a63bb 100644
--- a/packages/rstream-graph/src/nodes/math.ts
+++ b/packages/rstream-graph/src/nodes/math.ts
@@ -1,7 +1,7 @@
 import { IObjectOf } from "@thi.ng/api/api";
 import { map } from "@thi.ng/transducers/xform/map";
 
-import { MultiInputNodeFn } from "../api";
+import { NodeFactory } from "../api";
 import { node } from "../graph";
 
 /**
@@ -9,7 +9,7 @@ import { node } from "../graph";
  *
  * Inputs: any
  */
-export const add: MultiInputNodeFn<number> = node(
+export const add: NodeFactory<number> = node(
     map((ports: IObjectOf<number>) => {
         let acc = 0;
         let v;
@@ -25,7 +25,7 @@ export const add: MultiInputNodeFn<number> = node(
  *
  * Inputs: any
  */
-export const mul: MultiInputNodeFn<number> = node(
+export const mul: NodeFactory<number> = node(
     map((ports: IObjectOf<number>) => {
         let acc = 1;
         let v;
@@ -41,7 +41,7 @@ export const mul: MultiInputNodeFn<number> = node(
  *
  * Inputs: 2
  */
-export const sub: MultiInputNodeFn<number> =
+export const sub: NodeFactory<number> =
     node(map((ports: IObjectOf<number>) => ports.a - ports.b), 2);
 
 /**
@@ -49,5 +49,5 @@ export const sub: MultiInputNodeFn<number> =
  *
  * Inputs: 2
  */
-export const div: MultiInputNodeFn<number> =
+export const div: NodeFactory<number> =
     node(map((ports: IObjectOf<number>) => ports.a / ports.b), 2);