From c3f469374a49dae44bf9605504b7853d23f3636e Mon Sep 17 00:00:00 2001
From: Grahame Grieve <grahameg@gmail.ccom>
Date: Tue, 31 Oct 2023 16:57:42 +1100
Subject: [PATCH] fix broken links in extension references done by [[[]]]

---
 .../java/org/hl7/fhir/r5/renderers/DataRenderer.java   | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/renderers/DataRenderer.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/renderers/DataRenderer.java
index 88adf4f63..2627640dd 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/renderers/DataRenderer.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/renderers/DataRenderer.java
@@ -161,9 +161,17 @@ public class DataRenderer extends Renderer implements CodeResolver {
         if (p == null)
           p = getContext().getWorker().fetchResource(StructureDefinition.class, link);
         if (p != null) {
+          if ("Extension".equals(p.getType())) {
+            path = null;
+          } else if (p.hasSnapshot()) {
+            path = p.getSnapshot().getElementFirstRep().getPath();
+          } else if (Utilities.isAbsoluteUrl(path)) {
+            path = null;
+          }
           url = p.getWebPath();
-          if (url == null)
+          if (url == null) {
             url = p.getUserString("filename");
+          }
         } else
           throw new DefinitionException("Unable to resolve markdown link "+link);