diff --git a/platform/lang-api/src/com/intellij/lang/documentation/ExternalDocumentationHandler.java b/platform/lang-api/src/com/intellij/lang/documentation/ExternalDocumentationHandler.java
new file mode 100644
index 000000000000..0584d7cff1cd
--- /dev/null
+++ b/platform/lang-api/src/com/intellij/lang/documentation/ExternalDocumentationHandler.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2000-2010 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.lang.documentation;
+
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiManager;
+
+/**
+ * User: spLeaner
+ */
+public interface ExternalDocumentationHandler {
+  boolean handleExternal(PsiElement element, PsiElement originalElement);
+  boolean handleExternalLink(PsiManager psiManager, String link, PsiElement context);
+}