diff --git a/built-components.html b/built-components.html
index 6cef122..055acb9 100644
--- a/built-components.html
+++ b/built-components.html
@@ -172,6 +172,37 @@
             It describes list of <a href="apis/latest/org/apache/nlpcraft/nlp/parsers/NCSemanticElement.html">NCSemanticElement</a>
             which are represented <a href="https://en.wikipedia.org/wiki/Named-entity_recognition">Named entities</a>.
         </p>
+
+        <p>
+            Each <a href="apis/latest/org/apache/nlpcraft/nlp/parsers/NCSemanticElement.html">NCSemanticElement</a>
+            is presented by <code>id</code>, <code>groups</code>, <code>synonyms</code>, <code>values</code> and <code>properties</code>.
+        <p>
+
+        <section id="element-synonyms">
+            <h3>Element synonyms</h3>
+            <p>TODO...</p>
+        </section>
+
+        <section id="element-values">
+            <h3>Element values</h3>
+            <p>TODO...</p>
+        </section>
+
+        <section id="element-groups">
+            <h3>Element values</h3>
+            <p>TODO...</p>
+        </section>
+
+        <section id="element-macros">
+            <h3>Element macros</h3>
+            <p>TODO...</p>
+        </section>
+
+        <section id="external-declaration">
+            <h3>External JSON/YAML Declaration</h3>
+            <p>TODO...</p>
+        </section>
+
     </section>
 
     <section id="examples">