DOCSP-36179-schema-validation-updates (#6156) (#6298)

* DOCSP-36179-schema-validation-updates

* DOCSP-36179-schema-validation-updates

* DOCSP-36179-schema-validation-updates

* DOCSP-36179-schema-validation-updates

* DOCSP-36179-schema-validation-updates

* DOCSP-36179-schema-validation-updates

* DOCSP-36179-schema-validation-updates

* DOCSP-36179-schema-validation-updates

* DOCSP-36179-schema-validation-updates

* DOCSP-36179-schema-validation-updates

* DOCSP-36179-schema-validation-updates

* DOCSP-36179-schema-validation-updates

---------

Co-authored-by: jason-price-mongodb <jshfjghsdfgjsdjh@aolsdjfhkjsdhfkjsdf.com>

Author: jason-price-mongodb

source/core/schema-validation.txt

@@ -51,26 +51,20 @@ validation in the following scenarios:
   from accidentally misspelling an item name when entering sales data.
 
 - For a students collection, ensure that the ``gpa`` field is always a
-  positive number. This validation catches typos during data entry.
+  positive number. This validation prevents errors during data entry.
 
 When MongoDB Checks Validation
 ------------------------------
 
-When you create a new collection with schema validation, MongoDB checks
-validation during updates and inserts in that collection.
+After you add schema validation rules to a collection:
 
-When you add validation to an existing, non-empty collection:
-
-- Newly inserted documents are checked for validation.
-
-- Documents already existing in your collection are not checked for
-  validation until they are modified. Specific behavior for existing
-  documents depends on your chosen validation level. To learn more, see
+- All document inserts must match the rules.
+- The schema validation level defines how the rules are applied to
+  existing documents and document updates. To learn more, see
   :ref:`schema-specify-validation-level`.
 
-Adding validation to an existing collection does not enforce validation
-on existing documents. To check a collection for invalid documents, use
-the :dbcommand:`validate` command.
+To find documents in a collection that don't match the schema validation
+rules, see :ref:`use-json-schema-query-conditions-find-documents`.
 
 What Happens When a Document Fails Validation
 ---------------------------------------------

source/core/schema-validation/specify-validation-level.txt

@@ -31,13 +31,15 @@ MongoDB applies validation rules:
      - Behavior
 
    * - ``strict``
-     - (*Default*) MongoDB applies validation rules to all inserts and
-       updates.
+     - (*Default*) MongoDB applies the same validation rules to all
+       document inserts and updates.
 
    * - ``moderate``
-     -  MongoDB only applies validation rules to existing valid
-        documents. Updates to invalid documents which exist prior to the
-        validation being added are not checked for validity.
+     -  MongoDB applies the same validation rules to document inserts
+        and updates to existing valid documents that match the
+        validation rules. Updates to existing documents in the
+        collection that don't match the validation rules aren't checked
+        for validity.
 
 Prerequisite
 ------------
@@ -260,7 +262,7 @@ documents.
             upsertedCount: 0
          }
 
-      The output shows that:
+      The output shows:
 
       - The update fails for the document with ``_id: 1``. This document
         met the initial validation requirements, and MongoDB applies

source/core/schema-validation/use-json-schema-query-conditions.txt

@@ -102,11 +102,14 @@ Both commands return the same result:
      }
    ]
 
+.. _use-json-schema-query-conditions-find-documents:
+
 Find Documents that Don't Match the Schema
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-To find all documents do not satisfy the schema:, use
-:query:`$jsonSchema` with the :query:`$nor` operator:
+To find documents in a collection that don't match the schema validation
+rules, use :query:`$jsonSchema` with the :query:`$nor` operator. For
+example:
 
 .. code-block:: javascript