diff --git a/src/Value/LineName.php b/src/Value/LineName.php
index 7b7690f8..3629880a 100644
--- a/src/Value/LineName.php
+++ b/src/Value/LineName.php
@@ -9,6 +9,12 @@
 use Sabberworm\CSS\Parsing\UnexpectedEOFException;
 use Sabberworm\CSS\Parsing\UnexpectedTokenException;
 
+/**
+ * A name for a named CSS grid line.
+ *
+ * @see https://www.w3.org/TR/css-grid-1/#line-name
+ * @see https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Grid_layout/Named_grid_lines
+ */
 class LineName extends ValueList
 {
     /**