diff --git a/spec.txt b/spec.txt
index 91551e51..a15cfbb0 100644
--- a/spec.txt
+++ b/spec.txt
@@ -1617,6 +1617,9 @@ as inlines.  The first word of the [info string] is typically used to
 specify the language of the code sample, and rendered in the `class`
 attribute of the `code` tag.  However, this spec does not mandate any
 particular treatment of the [info string].
+That means, extensions may use the information, for instance, 
+to highlight the syntax with different colors 
+or to parse and evaluate the code, e.g. to create a diagram.
 
 Here is a simple example with backticks: