From 7a16c5457704c1c15fac6e4a4702d4f20de6774a Mon Sep 17 00:00:00 2001
From: "Hofstetter Benjamin (extern)" <benjamin.hofstetter@mobi.ch>
Date: Fri, 21 Jul 2023 13:32:23 +0200
Subject: [PATCH] missing prefix declaration Fixes #100

---
 src/endpoint.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/endpoint.ts b/src/endpoint.ts
index 1f9165b..535cd0f 100644
--- a/src/endpoint.ts
+++ b/src/endpoint.ts
@@ -217,6 +217,8 @@ export class Endpoint {
   async _fetchStructure() {
     const fromClause = this._settings.namedGraph ? `FROM <${this._settings.namedGraph}>` : ''
     const query = `
+      PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
+
       SELECT DISTINCT ?cls ?property ?linktype ?datatype
       ${fromClause}
       WHERE {