diff --git a/app/src/components/App.js b/app/src/components/App.js
index c577152..db06a15 100644
--- a/app/src/components/App.js
+++ b/app/src/components/App.js
@@ -5,7 +5,7 @@ import {useAsync} from '../util.js';
 import {
     diseasesBySymptoms,
     exploreSymptoms
-} from '../fetch.js';
+} from '../data/fetch.js';
 
 const App = () =>
 {
diff --git a/app/src/components/DiseaseGraph.js b/app/src/components/DiseaseGraph.js
index 0a4fee3..250f0bd 100644
--- a/app/src/components/DiseaseGraph.js
+++ b/app/src/components/DiseaseGraph.js
@@ -2,7 +2,7 @@ import React from 'react';
 import Graph from './Graph.js';
 import {types} from '../data/mock.js';
 import {useAsync} from '../util.js';
-import {symptomsSubgraph} from '../fetch.js';
+import {symptomsSubgraph} from '../data/fetch.js';
 
 const DiseaseGraph = ({terms, setTerms, results}) =>
 {
diff --git a/app/src/fetch.js b/app/src/data/fetch.js
similarity index 99%
rename from app/src/fetch.js
rename to app/src/data/fetch.js
index e772e5b..7af1913 100644
--- a/app/src/fetch.js
+++ b/app/src/data/fetch.js
@@ -1,4 +1,4 @@
-import * as mock from './data/mock.js';
+import * as mock from './mock.js';
 
 /**
  * Recherche l’ensemble des maladies liées par une relation « a pour symptôme »
diff --git a/app/src/data/mock.js b/app/src/data/mock.js
index 02c26fb..195629c 100644
--- a/app/src/data/mock.js
+++ b/app/src/data/mock.js
@@ -1,3 +1,8 @@
+/**
+ * @module
+ * Jeu de données d’exemple.
+ */
+
 /**
  * Types de termes de la base.
  */