diff --git a/cad/uhdm/pkg-descr b/cad/uhdm/pkg-descr
index db7c8971ad56..98071be7b803 100644
--- a/cad/uhdm/pkg-descr
+++ b/cad/uhdm/pkg-descr
@@ -1,3 +1,6 @@
 Universal Hardware Data Model. A complete modeling of the IEEE SystemVerilog
 Object Model with VPI Interface, Elaborator, Serialization, Visitor and
 Listener. Used as a compiled interchange format in between SystemVerilog tools.
+
+libuhdm implements the hardware object model standardized in:
+IEEE 1800.1-2017 chapter 37: VPI object model.