Update text

Author: xuniq

doc/reference/reference_lua/box_space/_schema.rst

@@ -12,14 +12,16 @@ box.space._schema
 
     This space contains the following tuples:
 
-    * ``version`` tuple with version information for this Tarantool instance,
-    * ``cluster`` tuple with the instance's replica set ID,
-    * ``max_id`` tuple with the maximal space ID,
-    * ``once...`` tuples that correspond to specific
+    * ``version``: version information for this Tarantool instance.
+    * ``replicaset_name`` (since :doc:`3.0.0 <release/3.0.0>`): the name of a replica set to which this instance belongs.
+    * ``replicaset_uuid``: the instance's replica set UUID. In the version :doc:`3.0.0 <release/3.0.0>`, the field was renamed from ``cluster`` to ``replicaset_uuid``.
+    * ``max_id`` (deprecated since :doc:`2.11.1 <https://github.com/tarantool/tarantool/releases/tag/2.11.1>`__): the maximal space ID.
+      Use the ``_space:max()`` function instead.
+    * ``once...``: tuples that correspond to specific
       :doc:`box.once() </reference/reference_lua/box_once>` blocks from the instance's
       :ref:`initialization file <index-init_label>`.
       The first field in these tuples contains the ``key`` value from the
-      corresponding ``box.once()`` block prefixed with 'once' (e.g. `oncehello`),
+      corresponding ``box.once()`` block prefixed with 'once' (for example, ``oncehello``),
       so you can easily find a tuple that corresponds to a specific
       ``box.once()`` block.
 
@@ -28,12 +30,11 @@ box.space._schema
     Here is what ``_schema`` contains in a typical installation (notice the
     tuples for two ``box.once()`` blocks, ``'oncebye'`` and ``'oncehello'``):
 
-    .. code-block:: tarantoolsession
+    ..  code-block:: tarantoolsession
 
-       tarantool> box.space._schema:select{}
-       ---
-       - - ['cluster', 'b4e15788-d962-4442-892e-d6c1dd5d13f2']
-         - ['max_id', 512]
-         - ['oncebye']
-         - ['oncehello']
-         - ['version', 1, 7, 2]
+        app:instance001> box.space._schema:select{}
+        ---
+        - - ['replicaset_name', 'replicaset001']
+          - ['replicaset_uuid', 'd844f92f-d297-4fa2-8a80-c10860f5d8b5']
+          - ['version', 3, 1, 0]
+        ...