[FAB-9395] World State

This CR is for 2 glossary items:
World State
Current State
1. Added World State to glossary
2. Removed definition of Current
State and pointed it to world state
Any comments for other items in the
glossary will be addressed as new
jira items.

Signed-off-by: pama-ibm <pama@ibm.com>

Change-Id: Id66edba85acba85c38c22c86c6c70d82ce21b85e
Signed-off-by: pama-ibm <pama@ibm.com>

Author: pamandrejko

docs/source/glossary.rst

@@ -120,12 +120,7 @@ that is not defined in a consortium may be added to an existing channel.
 Current State
 -------------
 
-The current state of the ledger represents the latest values for all keys ever
-included in its chain transaction log. Peers commit the latest values to ledger
-current state for each valid transaction included in a processed block. Since
-current state represents all latest key values known to the channel, it is
-sometimes referred to as World State. Chaincode executes transaction proposals
-against current state data.
+See World-State_.
 
 .. _Dynamic-Membership:
 
@@ -411,5 +406,24 @@ start and initialize a chaincode on a channel. Application clients gather invoke
 instantiate responses from endorsing peers and package the results and endorsements
 into a transaction that is submitted for ordering, validation, and commit.
 
+.. _World-State:
+
+World State
+-----------
+
+Also known as the “current state”, the world state is a component of the
+HyperLedger Fabric :ref:`Ledger`. The world state represents the latest values
+for all keys included in the chain transaction log. Chaincode executes
+transaction proposals against world state data because the world state provides
+direct access to the latest value of these keys rather than having to calculate
+them by traversing the entire transaction log. The world state will change
+every time the value of a key changes (for example, when the ownership of a
+car -- the "key" -- is transferred from one owner to another -- the
+"value") or when a new key is added (a car is created). As a result, the world
+state is critical to a transaction flow, since the current state of a key-value
+pair must be known before it can be changed. Peers commit the latest values to
+the ledger world state for each valid transaction included in a processed block.
+
+
 .. Licensed under Creative Commons Attribution 4.0 International License
    https://creativecommons.org/licenses/by/4.0/