Document legacy CPS Path functionality

Issue-ID: CPS-334

Signed-off-by: ToineSiebelink <toine.siebelink@est.tech>
Change-Id: Ib5266c7b30097661d97f8a499eaddc738dda0539
diff --git a/docs/modeling.rst b/docs/modeling.rst
index 74ee8ec..6b15abc 100644
--- a/docs/modeling.rst
+++ b/docs/modeling.rst
@@ -45,3 +45,7 @@
 
   The data node position within a tree is uniquely identified by the node's unique **xpath** which can be used
   for partial data query.
+
+Querying
+
+- **CPS Path** is used to query data nodes. The CPS Path is described in detail in :doc:`cps-path`.