diff --git a/common/terms.html b/common/terms.html
index 9660e67e..a779d5ed 100644
--- a/common/terms.html
+++ b/common/terms.html
@@ -383,6 +383,8 @@
Its value is either a string (simple term definition),
expanding to an IRI,
or a map (expanded term definition).
+
+ For context processing, term definition values are converted internally to a dedicated data structure that is easier to process.
Change the type of term definition from array to map in active context, + to be consistent with the way it is used in the algorithms. + Clarify the notion of "term definition". + For more information, refer to issue 630. +
+The active context consists of:
Each term definition consists of:
+Each term definition's value consists of: