--- /dev/null
+// Copyright (C) The Arvados Authors. All rights reserved.
+//
+// SPDX-License-Identifier: AGPL-3.0
+
+import * as React from 'react';
+import { WrappedFieldProps, Field } from 'redux-form';
+import { memoize } from 'lodash';
+import { Autocomplete } from '~/components/autocomplete/autocomplete';
+import { Vocabulary } from '~/models/vocabulary';
+import { connectVocabulary, VocabularyProp, buildProps } from '~/views-components/resource-properties-form/property-field-common';
+import { TAG_KEY_VALIDATION } from '~/validators/validators';
+
+export const PROPERTY_KEY_FIELD_NAME = 'key';
+
+export const PropertyKeyField = connectVocabulary(
+ ({ vocabulary }: VocabularyProp) =>
+ <Field
+ name={PROPERTY_KEY_FIELD_NAME}
+ component={PropertyKeyInput}
+ vocabulary={vocabulary}
+ validate={getValidation(vocabulary)} />);
+
+const PropertyKeyInput = ({ vocabulary, ...props }: WrappedFieldProps & VocabularyProp) =>
+ <Autocomplete
+ label='Key'
+ suggestions={getSuggestions(props.input.value, vocabulary)}
+ {...buildProps(props)}
+ />;
+
+const getValidation = memoize(
+ (vocabulary: Vocabulary) =>
+ vocabulary.strict
+ ? [...TAG_KEY_VALIDATION, matchTags(vocabulary)]
+ : TAG_KEY_VALIDATION);
+
+const matchTags = (vocabulary: Vocabulary) =>
+ (value: string) =>
+ getTagsList(vocabulary).find(tag => tag.includes(value))
+ ? undefined
+ : 'Incorrect key';
+
+const getSuggestions = (value: string, vocabulary: Vocabulary) =>
+ getTagsList(vocabulary).filter(tag => tag.includes(value) && tag !== value);
+
+const getTagsList = ({ tags }: Vocabulary) =>
+ Object.keys(tags);