More closely match modern JSON Schema vocabulary in internal module n…

…ames.

These are private, so it's easy to rename them to use preferred modern
terminology, namely that individual keywords are called 'keywords' rather
than 'validators'.

This leaves the latter ('validator') to have one fewer overloaded meaning
in this library, leaving it primarily referring to class objects such as
DraftNValidator objects, however there are still at least 2 public places
where we conflate terminology:

    * In the VALIDATORS attribute on validator classes, where this
      attribute is a mapping from str to callable but really the
      callables are callables for each *keyword*

    * ValidationError.validator, which is really the *keyword* which
      failed validation

These are of course public API and need deprecating, which hasn't been
done thus far mostly to not create API churn simply to rename.

In the future however, it's likely that broader deprecations will help
us deprecate these.

Specifically when we implement fuller support for vocabularies and/or
deprecate jsonschema.validators.create in favor of newer objects, we may
get a chance to replace VALIDATORS, and when we implement more robust
exception types (e.g. to address #119) we likely will deprecate
.validator.

docs/creating.rst

@@ -31,8 +31,6 @@ where in the instance or schema respectively the error occurred.
 The Validator Protocol
 ----------------------
 
-``jsonschema`` defines a `protocol <typing.Protocol>`,
-`jsonschema.protocols.Validator` which can be used in type annotations to
-describe the type of a validator object.
+``jsonschema`` defines a `protocol <typing.Protocol>`, `jsonschema.protocols.Validator` which can be used in type annotations to describe the type of a validator.
 
 For full details, see `validator-protocol`.

docs/errors.rst

@@ -238,9 +238,7 @@ failed when validating a given instance, you may want to do so using
 
     .. attribute:: errors
 
-        The mapping of validator keywords to the error objects (usually
-        `jsonschema.exceptions.ValidationError`\s) at this level
-        of the tree.
+        The mapping of validation keywords to the error objects (usually `jsonschema.exceptions.ValidationError`\s) at this level of the tree.
 
 Consider the following example:
 
@@ -276,10 +274,7 @@ error objects.
     from jsonschema.exceptions import ErrorTree
     tree = ErrorTree(v.iter_errors(instance))
 
-As you can see, `jsonschema.exceptions.ErrorTree` takes an
-iterable of `ValidationError`\s when constructing a tree so
-you can directly pass it the return value of a validator object's
-`jsonschema.protocols.Validator.iter_errors` method.
+As you can see, `jsonschema.exceptions.ErrorTree` takes an iterable of `ValidationError`\s when constructing a tree so you can directly pass it the return value of a validator's `jsonschema.protocols.Validator.iter_errors` method.
 
 `ErrorTree`\s support a number of useful operations. The first one we
 might want to perform is to check whether a given element in our instance

docs/faq.rst

@@ -50,12 +50,9 @@ This library made the choice to leave it off by default, for two reasons:
       implementations they were using to ensure they too were explicitly
       enabled for :kw:`format` validation.
 
-As of ``draft2019-09`` however, the opt-out by default behavior
-mentioned here is now *required* for all validators.
+As of ``draft2019-09`` however, the opt-out by default behavior mentioned here is now *required* for all implementations of JSON Schema.
 
-Difficult as this may sound for new users, at this point it at least
-means they should expect the same behavior that has always been
-implemented here, across any other implementation they encounter.
+Difficult as this may sound for new users, at this point it at least means they should expect the same behavior that has always been implemented here, across any other implementation they encounter.
 
 .. seealso::
 

jsonschema/tests/test_types.py

@@ -8,7 +8,7 @@
 from collections import namedtuple
 from unittest import TestCase
 
-from jsonschema import ValidationError, _validators
+from jsonschema import ValidationError, _keywords
 from jsonschema._types import TypeChecker
 from jsonschema.exceptions import UndefinedTypeCheck, UnknownType
 from jsonschema.validators import Draft202012Validator, extend
@@ -191,8 +191,8 @@ def coerced(validator, value, instance, schema):
                 return fn(validator, value, instance, schema)
             return coerced
 
-        required = coerce_named_tuple(_validators.required)
-        properties = coerce_named_tuple(_validators.properties)
+        required = coerce_named_tuple(_keywords.required)
+        properties = coerce_named_tuple(_keywords.properties)
 
         CustomValidator = extend(
             Draft202012Validator,