apps+model+utils: Implementing Interest/Data hop counting using new PacketTag
diff --git a/docs/source/metric.rst b/docs/source/metric.rst
index 03ee82f..0e821f0 100644
--- a/docs/source/metric.rst
+++ b/docs/source/metric.rst
@@ -247,7 +247,15 @@
+-----------------+---------------------------------------------------------------------+
| ``RetxCount`` | number of Interest retransmissions (for LastDelay always equal to 1)|
+-----------------+---------------------------------------------------------------------+
-
+ | ``HopCount`` | combined number of number of hops for Interest and Data packet. |
+ | | Note that HopCount is increased anytime somebody calls Send method |
+ | | on a face, including delivery of Interest/Data to application via |
+ | | an AppFace (but not from application to ndn::L3Protocol!). |
+ | | |
+ | | One consequence is that Interests satisfied by an app will have |
+ | | even hop count (min hop count = 2), and Interests satisfied from |
+ | | caches will have off hop count (min hop count = 1) |
+ +-----------------+---------------------------------------------------------------------+
.. _app delay trace helper example: