Address NR feedback

Author: mcmorisi

source/fundamentals/indexes.txt

@@ -306,6 +306,8 @@ The following code shows how to delete a search index from a collection:
    :start-after: start drop-search-index
    :end-before: end drop-search-index
 
+.. _text-indexes:
+
 Text Indexes
 ~~~~~~~~~~~~
 
@@ -424,28 +426,31 @@ in the {+mdb-server+} manual.
 Unique Indexes
 ~~~~~~~~~~~~~~
 
+.. _unique-indexes:
+
 Unique indexes ensure that the indexed fields do not store duplicate values. By default, MongoDB creates a unique index
 on the ``_id`` field during the creation of a collection. To create a unique index, specify the field or combination of
 fields that you want to prevent duplication on and set the ``unique`` option to ``true``.
 
 The following example creates a unique, descending index on the ``theaterId`` field:
 
-.. literalinclude:: 
-   :language: csharp
+.. literalinclude:: /includes/fundamentals/code-snippets/IndexPage.java
+   :language: java
    :dedent:
    :start-after: begin unique index
    :end-before: end unique index
 
-If you attempt to perform a write operation that stores a duplicate value
-that violates the unique index, MongoDB will throw an error that resembles
-the following:
+.. important::
 
-.. code-block:: none
-   :copyable: false
+   If you perform a write operation that stores a duplicate value that violates the unique index, the MongoDB
+   Java driver raises a ``DuplicateKeyException``, and MongoDB throws an error resembling the following:
+
+   .. code-block:: none
+      :copyable: false
 
-   E11000 duplicate key error index
+      E11000 duplicate key error index
 
-To learn more, see :manual:`Unique Indexes </core/index-unique>`.
+For more information, see the :manual:`Unique Indexes</core/index-unique>` page in the {+mdb-server+} manual.
 
 Wildcard Indexes
 ~~~~~~~~~~~~~~~~
@@ -590,4 +595,4 @@ For prior versions of MongoDB, pass "*" as a parameter to your call to
 For more information about the methods in this section, see the following API Documentation:
 
 - `dropIndex() <{+api+}/apidocs/mongodb-driver-sync/com/mongodb/client/MongoCollection.html#dropIndex(java.lang.String)>`__
-- `dropIndexes() <{+api+}/apidocs/mongodb-driver-sync/com/mongodb/client/MongoCollection.html#dropIndexes()>`__
+- `dropIndexes() <{+api+}/apidocs/mongodb-driver-sync/com/mongodb/client/MongoCollection.html#dropIndexes()>`__

source/usage-examples.txt

@@ -66,7 +66,7 @@ to learn how to allow connections to your instance of Atlas and to find the
 :manual:`connection string </reference/connection-string/>` you use to replace the
 ``uri`` variable in usage examples. If your instance uses
 :manual:`SCRAM authentication </core/security-scram/>`, you can replace
-``<db_username>`` with your username, ``<db_password>`` with your password, and
+``<db_username>`` with your database username, ``<db_password>`` with your database password, and
 ``<cluster-url>`` with the IP address or URL of your instance.
 
 For more information about connecting to your MongoDB instance, see our