diff --git a/specs/sysml/sysml-spec.html b/specs/sysml/sysml-spec.html
index 616be96..9043597 100644
--- a/specs/sysml/sysml-spec.html
+++ b/specs/sysml/sysml-spec.html
@@ -666,6 +666,16 @@ <h2>Vocabulary Terms and Constraints</h2>
       </p>
     </section>
 
+    <section id="VocabularySubsets">
+      <h2>Vocabulary Subsets</h2>
+      <p class="conformance">
+        SysML OSLC servers MAY choose to limit the types of SysML resources that can be accessed directly with a URL,
+        or are accessible for resource preview or selection and creation dialogs. This allows servers to simplify the OSLC REST
+        API to those SysML elements that are necessary for their particular purpose. SysML Servers MUST allow direct access to at least
+        Element and Relationship.
+      </p>
+    </section>
+
     <section id="capabilities">
       <h2>SysML Server Capabilities</h2>