diff --git a/rsconcept/frontend/package.json b/rsconcept/frontend/package.json
index b4915909..9d5ff7ad 100644
--- a/rsconcept/frontend/package.json
+++ b/rsconcept/frontend/package.json
@@ -4,7 +4,7 @@
   "version": "1.0.0",
   "type": "module",
   "scripts": {
-    "prepare": "lezer-generator src/components/RSInput/rslang/rslangFull.grammar -o src/components/RSInput/rslang/parser.ts",
+    "prepare": "lezer-generator src/components/RSInput/rslang/rslangFull.grammar -o src/components/RSInput/rslang/parser.ts && lezer-generator src/components/RefsInput/parse/refsText.grammar -o src/components/RefsInput/parse/parser.ts",
     "test": "jest",
     "dev": "vite",
     "build": "tsc && vite build",
diff --git a/rsconcept/frontend/src/components/RSInput/index.tsx b/rsconcept/frontend/src/components/RSInput/index.tsx
index 6a9f4fd8..c0098fb3 100644
--- a/rsconcept/frontend/src/components/RSInput/index.tsx
+++ b/rsconcept/frontend/src/components/RSInput/index.tsx
@@ -45,7 +45,7 @@ const editorSetup: BasicSetupOptions = {
 
 interface RSInputProps 
 extends Pick<ReactCodeMirrorProps, 
-  'id'| 'editable' | 'height' | 'value' | 'className' | 'onFocus' | 'onBlur'
+  'id'| 'editable' | 'height' | 'value' | 'className' | 'onFocus' | 'onBlur' | 'placeholder'
 > {
   label?: string
   innerref?: RefObject<ReactCodeMirrorRef> | undefined
diff --git a/rsconcept/frontend/src/components/RefsInput/index.tsx b/rsconcept/frontend/src/components/RefsInput/index.tsx
new file mode 100644
index 00000000..b7b16a76
--- /dev/null
+++ b/rsconcept/frontend/src/components/RefsInput/index.tsx
@@ -0,0 +1,172 @@
+
+import { Extension } from '@codemirror/state';
+import { tags } from '@lezer/highlight';
+import { createTheme } from '@uiw/codemirror-themes';
+import CodeMirror, { BasicSetupOptions, ReactCodeMirrorProps, ReactCodeMirrorRef } from '@uiw/react-codemirror';
+import { EditorView } from 'codemirror';
+import { RefObject, useCallback, useMemo, useRef, useState } from 'react';
+
+import { useRSForm } from '../../context/RSFormContext';
+import { useConceptTheme } from '../../context/ThemeContext';
+import useResolveText from '../../hooks/useResolveText';
+import Label from '../Common/Label';
+import Modal from '../Common/Modal';
+import PrettyJson from '../Common/PrettyJSON';
+import { NaturalLanguage } from './parse';
+import { rshoverTooltip as rsHoverTooltip } from './tooltip';
+
+const editorSetup: BasicSetupOptions = {
+  highlightSpecialChars: false,
+  history: true,
+  drawSelection: false,
+  syntaxHighlighting: false,
+  defaultKeymap: true,
+  historyKeymap: true,
+
+  lineNumbers: false,
+  highlightActiveLineGutter: false,
+  foldGutter: false,
+  dropCursor: false,
+  allowMultipleSelections: false,
+  indentOnInput: false,
+  bracketMatching: false,
+  closeBrackets: false,
+  autocompletion: false,
+  rectangularSelection: false,
+  crosshairCursor: false,
+  highlightActiveLine: false,
+  highlightSelectionMatches: false,
+  closeBracketsKeymap: false,
+  searchKeymap: false,
+  foldKeymap: false,
+  completionKeymap: false,
+  lintKeymap: false
+};
+
+interface RefsInputInputProps 
+extends Pick<ReactCodeMirrorProps, 
+  'id'| 'editable' | 'height' | 'value' | 'className' | 'onFocus' | 'onBlur' | 'placeholder'
+> {
+  label?: string
+  innerref?: RefObject<ReactCodeMirrorRef> | undefined
+  onChange?: (newValue: string) => void
+  
+  initialValue?: string
+  value?: string
+  resolved?: string
+}
+
+function RefsInput({ 
+  id, label, innerref, onChange, editable, 
+  initialValue, value, resolved,
+  onFocus, onBlur,
+  ...props 
+}: RefsInputInputProps) {
+  const { darkMode, colors } = useConceptTheme();
+  const { schema } = useRSForm();
+
+  const { resolveText, refsData } = useResolveText({schema: schema});
+
+  const [showResolve, setShowResolve] = useState(false);
+  const [isFocused, setIsFocused] = useState(false);
+
+  const internalRef = useRef<ReactCodeMirrorRef>(null);
+  const thisRef = useMemo(
+  () => {
+    return innerref ?? internalRef;
+  }, [internalRef, innerref]);
+
+  const cursor = useMemo(() => editable ? 'cursor-text': 'cursor-default', [editable]);
+  const customTheme: Extension = useMemo(
+  () => createTheme({
+    theme: darkMode ? 'dark' : 'light',
+    settings: {
+      fontFamily: 'inherit',
+      background: editable ? colors.bgInput : colors.bgDefault,
+      foreground: colors.fgDefault,
+      selection: colors.bgHover
+    },
+    styles: [
+      { tag: tags.name, color: colors.fgPurple }, // GlobalID
+      { tag: tags.literal, color: colors.fgBlue }, // literals
+    ]
+  }), [editable, colors, darkMode]);
+
+  const editorExtensions = useMemo(
+  () => [
+    EditorView.lineWrapping,
+    NaturalLanguage,
+    rsHoverTooltip(schema?.items || []),
+  ], [schema?.items]);
+
+  function handleChange(newValue: string) {
+    if (onChange) onChange(newValue);
+  }
+
+  function handleFocusIn(event: React.FocusEvent<HTMLDivElement>) {
+    setIsFocused(true);
+    if (onFocus) onFocus(event);
+  }
+
+  function handleFocusOut(event: React.FocusEvent<HTMLDivElement>) {
+    setIsFocused(false);
+    if (onBlur) onBlur(event);
+  }
+
+  const handleInput = useCallback(
+  (event: React.KeyboardEvent<HTMLDivElement>) => {
+    if (!thisRef.current) {
+      event.preventDefault();
+      return;
+    }
+    if (event.altKey) {
+      if (event.key === 'r' && value) {
+        event.preventDefault();
+        resolveText(value, () => {
+          setShowResolve(true);
+        });
+        return;
+      }
+    }
+  }, [thisRef, resolveText, value]);
+
+  return (
+  <>
+    { showResolve &&
+    <Modal
+      readonly
+      hideWindow={() => setShowResolve(false)}
+    >
+      <div className='max-h-[60vh] max-w-[80vw] overflow-auto'>
+        <PrettyJson data={refsData} />
+      </div>
+    </Modal>}
+    <div className={`flex flex-col  w-full ${cursor}`}>
+    {label && 
+    <Label
+      text={label}
+      required={false}
+      htmlFor={id}
+      className='mb-2'
+    />}
+    <CodeMirror id={id}
+      ref={thisRef}
+      basicSetup={editorSetup}
+      theme={customTheme}
+      extensions={editorExtensions}
+
+      value={isFocused ? value : (value !== initialValue ? value : resolved)}
+
+      indentWithTab={false}
+      onChange={handleChange}
+      editable={editable}
+      onKeyDown={handleInput}
+      onFocus={handleFocusIn}
+      onBlur={handleFocusOut}
+      {...props}
+    />
+    </div>
+  </>);
+}
+
+export default RefsInput;
diff --git a/rsconcept/frontend/src/components/RefsInput/parse/highlight.ts b/rsconcept/frontend/src/components/RefsInput/parse/highlight.ts
new file mode 100644
index 00000000..b7ec1084
--- /dev/null
+++ b/rsconcept/frontend/src/components/RefsInput/parse/highlight.ts
@@ -0,0 +1,10 @@
+import {styleTags, tags} from '@lezer/highlight';
+
+export const highlighting = styleTags({
+  RefEntity: tags.name,
+  Global: tags.name,
+  Gram: tags.name,
+
+  RefSyntactic: tags.literal,
+  Offset: tags.literal,
+});
\ No newline at end of file
diff --git a/rsconcept/frontend/src/components/RefsInput/parse/index.ts b/rsconcept/frontend/src/components/RefsInput/parse/index.ts
new file mode 100644
index 00000000..14ead267
--- /dev/null
+++ b/rsconcept/frontend/src/components/RefsInput/parse/index.ts
@@ -0,0 +1,8 @@
+import {LRLanguage} from '@codemirror/language'
+
+import { parser } from './parser';
+
+export const NaturalLanguage = LRLanguage.define({
+  parser: parser,
+  languageData: {}
+});
\ No newline at end of file
diff --git a/rsconcept/frontend/src/components/RefsInput/parse/parser.terms.ts b/rsconcept/frontend/src/components/RefsInput/parse/parser.terms.ts
new file mode 100644
index 00000000..69d3403e
--- /dev/null
+++ b/rsconcept/frontend/src/components/RefsInput/parse/parser.terms.ts
@@ -0,0 +1,10 @@
+// This file was generated by lezer-generator. You probably shouldn't edit it.
+export const
+  Text = 1,
+  RefEntity = 2,
+  Global = 3,
+  Gram = 4,
+  RefSyntactic = 5,
+  Offset = 6,
+  Nominal = 7,
+  Word = 8
diff --git a/rsconcept/frontend/src/components/RefsInput/parse/parser.test.ts b/rsconcept/frontend/src/components/RefsInput/parse/parser.test.ts
new file mode 100644
index 00000000..476ce5df
--- /dev/null
+++ b/rsconcept/frontend/src/components/RefsInput/parse/parser.test.ts
@@ -0,0 +1,26 @@
+import { printTree } from '../../../utils/print-lezer-tree';
+import { parser } from './parser';
+
+const testData = [
+  ['', '[Text]'],
+  ['тест русский', '[Text[Word][Word]]'],
+  ['test english', '[Text[Word][Word]]'],
+  ['test greek σσσ', '[Text[Word][Word][Word]]'],
+  ['X1 раз два X2', '[Text[Word][Word][Word][Word]]'],
+
+  ['@{1| черный }', '[Text[RefSyntactic[Offset][Nominal[Word]]]]'],
+  ['@{-1| черный }', '[Text[RefSyntactic[Offset][Nominal[Word]]]]'],
+  ['@{-100| черный слон }', '[Text[RefSyntactic[Offset][Nominal[Word][Word]]]]'],
+  ['@{X1|VERB,past,sing}', '[Text[RefEntity[Global][Gram][Gram][Gram]]]'],
+  ['@{X12|VERB,past,sing}', '[Text[RefEntity[Global][Gram][Gram][Gram]]]'],
+];
+
+describe('Testing NaturalParser', () => {
+  it.each(testData)('Parse %p', 
+  (input: string, expectedTree: string) => {
+    // NOTE: use strict parser to determine exact error position
+    // const tree = parser.configure({strict: true}).parse(input);
+    const tree = parser.parse(input);
+    expect(printTree(tree)).toBe(expectedTree);
+  });
+});
diff --git a/rsconcept/frontend/src/components/RefsInput/parse/parser.ts b/rsconcept/frontend/src/components/RefsInput/parse/parser.ts
new file mode 100644
index 00000000..e8e291c7
--- /dev/null
+++ b/rsconcept/frontend/src/components/RefsInput/parse/parser.ts
@@ -0,0 +1,18 @@
+// This file was generated by lezer-generator. You probably shouldn't edit it.
+import {LRParser} from "@lezer/lr"
+import {highlighting} from "./highlight.ts"
+export const parser = LRParser.deserialize({
+  version: 14,
+  states: "#rQVQPOOO_QQO'#C^OOQO'#Ck'#CkOOQO'#Cj'#CjOOQO'#Ce'#CeQVQPOOOgQPO,58xOlQPO,58{OOQO-E6c-E6cOqQSO1G.dOvQPO1G.gO{QQO'#CoO!TQPO7+$OOOQO'#Cf'#CfO!YQPO'#CcO!bQPO7+$ROqQSO,59ZOOQO<<Gj<<GjOOQO-E6d-E6dOOQO<<Gm<<GmOOQO1G.u1G.u",
+  stateData: "!j~O]OS~OWROaPO~ORUOUVO~ObXO~ObYO~OSZO~OW]O~Od`O`cX~O`aO~OW]O`VX~O`cO~OW]~",
+  goto: "!WdPPePPePiPlrPPPx|PPP!QTQOTR_YQTORWTQ^YRb^TSOTTROTQ[XRd`",
+  nodeNames: "⚠ Text RefEntity Global Gram RefSyntactic Offset Nominal Word",
+  maxTerm: 20,
+  propSources: [highlighting],
+  skippedNodes: [0],
+  repeatNodeCount: 2,
+  tokenData: "-}~R!TOX$bXZ%SZ^%w^p$bpq%Sq|$b|}'p}!O(^!O!Q$b!Q!R)a!R![*a![!b$b!b!c+c!c!d+n!d!e)a!e!f+n!f!g+n!g!h)a!h!i+n!i!r)a!r!s+n!s!t)a!t!u+n!u!v+n!v!w+n!w!z)a!z!{+n!{!})a!}#T$b#T#o)a#p#q-s#q#r-x#r#y$b#y#z%w#z$f$b$f$g%w$g#BY$b#BY#BZ%w#BZ$IS$b$IS$I_%w$I_$I|$b$I|$JO%w$JO$JT$b$JT$JU%w$JU$KV$b$KV$KW%w$KW&FU$b&FU&FV%w&FV;'S$b;'S;=`$|<%lO$bP$gVWPOX$bZp$bq!b$b!c#o$b#r;'S$b;'S;=`$|<%lO$bP%PP;=`<%l$b~%XY]~X^%Spq%S#y#z%S$f$g%S#BY#BZ%S$IS$I_%S$I|$JO%S$JT$JU%S$KV$KW%S&FU&FV%S~&OjWP]~OX$bXZ%SZ^%w^p$bpq%Sq!b$b!c#o$b#r#y$b#y#z%w#z$f$b$f$g%w$g#BY$b#BY#BZ%w#BZ$IS$b$IS$I_%w$I_$I|$b$I|$JO%w$JO$JT$b$JT$JU%w$JU$KV$b$KV$KW%w$KW&FU$b&FU&FV%w&FV;'S$b;'S;=`$|<%lO$bR'wVdQWPOX$bZp$bq!b$b!c#o$b#r;'S$b;'S;=`$|<%lO$bV(e^SSWPOX$bZp$bq}$b}!O)a!O!Q$b!Q!R)a!R![*a![!b$b!c!})a!}#T$b#T#o)a#r;'S$b;'S;=`$|<%lO$bT)h]SSWPOX$bZp$bq}$b}!O)a!O!Q$b!Q![)a![!b$b!c!})a!}#T$b#T#o)a#r;'S$b;'S;=`$|<%lO$bV*j]SSUQWPOX$bZp$bq}$b}!O)a!O!Q$b!Q![*a![!b$b!c!})a!}#T$b#T#o)a#r;'S$b;'S;=`$|<%lO$b~+fP#o#p+i~+nOa~V+u^SSWPOX$bZp$bq}$b}!O)a!O!Q$b!Q!R)a!R![,q![!b$b!c!})a!}#T$b#T#o)a#r;'S$b;'S;=`$|<%lO$bV,z]RQSSWPOX$bZp$bq}$b}!O)a!O!Q$b!Q![,q![!b$b!c!})a!}#T$b#T#o)a#r;'S$b;'S;=`$|<%lO$b~-xOb~~-}O`~",
+  tokenizers: [0, 1, 2],
+  topRules: {"Text":[0,1]},
+  tokenPrec: 69
+})
diff --git a/rsconcept/frontend/src/components/RefsInput/parse/refsText.grammar b/rsconcept/frontend/src/components/RefsInput/parse/refsText.grammar
new file mode 100644
index 00000000..604cad9f
--- /dev/null
+++ b/rsconcept/frontend/src/components/RefsInput/parse/refsText.grammar
@@ -0,0 +1,50 @@
+@precedence {
+  p1
+  p2
+}
+
+@top Text { textItem* }
+
+@skip { space }
+
+@tokens {
+  space { @whitespace+ }
+
+  Offset { $[-]?$[1-9]$[0-9]* }
+  Global { $[XCSDATFPR]$[1-9]$[0-9]* }
+
+  Word { ![@{|} \t\n]+ }
+
+  Gram { $[-a-zA-Z0-9]+ } 
+
+  @precedence { Word, space }
+}
+
+textItem { 
+  !p1 ref |
+  !p2 Word
+}
+
+ref {
+  RefEntity |
+  RefSyntactic
+}
+
+RefEntity {
+  "@{" Global "|" grams "}"
+}
+
+RefSyntactic {
+  "@{" Offset "|" Nominal "}"
+}
+
+Nominal { Word+ }
+
+grams {
+  Gram |
+  Gram "," grams
+}
+
+@detectDelim
+
+@external propSource highlighting from "./highlight.ts"
\ No newline at end of file
diff --git a/rsconcept/frontend/src/components/RefsInput/tooltip.ts b/rsconcept/frontend/src/components/RefsInput/tooltip.ts
new file mode 100644
index 00000000..42e546cc
--- /dev/null
+++ b/rsconcept/frontend/src/components/RefsInput/tooltip.ts
@@ -0,0 +1,63 @@
+import { Extension } from '@codemirror/state';
+import { hoverTooltip } from '@codemirror/view';
+
+import { IConstituenta } from '../../models/rsform';
+import { labelCstTypification } from '../../utils/labels';
+
+function createTooltipFor(cst: IConstituenta) {
+  const dom = document.createElement('div');
+  dom.className = 'overflow-y-auto border shadow-md max-h-[25rem] max-w-[25rem] min-w-[10rem] w-fit z-tooltip text-sm px-2 py-2';
+  const alias = document.createElement('p');
+  alias.innerHTML = `<b>${cst.alias}:</b> ${labelCstTypification(cst)}`;
+  dom.appendChild(alias);
+  if (cst.term_resolved) {
+    const term = document.createElement('p');
+    term.innerHTML = `<b>Термин:</b> ${cst.term_resolved}`;
+    dom.appendChild(term);
+  }
+  if (cst.definition_formal) {
+    const expression = document.createElement('p');
+    expression.innerHTML = `<b>Выражение:</b> ${cst.definition_formal}`;
+    dom.appendChild(expression);
+  }
+  if (cst.definition_resolved) {
+    const definition = document.createElement('p');
+    definition.innerHTML = `<b>Определение:</b> ${cst.definition_resolved}`;
+    dom.appendChild(definition);
+  }
+  if (cst.convention) {
+    const convention = document.createElement('p');
+    convention.innerHTML = `<b>Конвенция:</b> ${cst.convention}`;
+    dom.appendChild(convention);
+  }
+  return { dom: dom }
+}
+
+export const getHoverTooltip = (items: IConstituenta[]) => {
+  return hoverTooltip((view, pos, side) => {
+    const {from, to, text} = view.state.doc.lineAt(pos);
+    let start = pos, end = pos;
+    while (start > from && /\w/.test(text[start - from - 1]))
+      start--;
+    while (end < to && /\w/.test(text[end - from]))
+      end++;
+    if (start === pos && side < 0 || end === pos && side > 0) {
+      return null;
+    }
+    const alias = text.slice(start - from, end - from);
+    const cst = items.find(cst => cst.alias === alias);
+    if (!cst) {
+      return null;
+    }
+    return {
+      pos: start,
+      end: end,
+      above: false,
+      create: () => createTooltipFor(cst)
+    }
+  });
+}
+
+export function rshoverTooltip(items: IConstituenta[]): Extension {
+  return [getHoverTooltip(items)];
+}
diff --git a/rsconcept/frontend/src/pages/RSFormPage/EditorConstituenta.tsx b/rsconcept/frontend/src/pages/RSFormPage/EditorConstituenta.tsx
index e6c3972a..23db4fe4 100644
--- a/rsconcept/frontend/src/pages/RSFormPage/EditorConstituenta.tsx
+++ b/rsconcept/frontend/src/pages/RSFormPage/EditorConstituenta.tsx
@@ -8,6 +8,7 @@ import SubmitButton from '../../components/Common/SubmitButton';
 import TextArea from '../../components/Common/TextArea';
 import HelpConstituenta from '../../components/Help/HelpConstituenta';
 import { DumpBinIcon, HelpIcon, PenIcon, SaveIcon, SmallPlusIcon } from '../../components/Icons';
+import RefsInput from '../../components/RefsInput';
 import { useRSForm } from '../../context/RSFormContext';
 import useWindowSize from '../../hooks/useWindowSize';
 import { EditMode } from '../../models/miscelanious';
@@ -144,7 +145,7 @@ function EditorConstituenta({
         <MiniButton
           tooltip={`Редактировать словоформы термина: ${activeCst.term_forms.length}`}
           disabled={!isEnabled}
-          dimensions='w-fit ml-[3.2rem] pt-[0.4rem]'
+          dimensions='w-fit ml-[3.2rem] pt-[0.3rem]'
           noHover
           onClick={onEditTerm}
           icon={<PenIcon size={4} color={isEnabled ? 'text-primary' : ''} />}
@@ -219,15 +220,15 @@ function EditorConstituenta({
           onChange={newValue => setExpression(newValue)}
           setTypification={setTypification}
         />
-        <ReferenceInput id='definition' label='Текстовое определение'
+        <RefsInput id='definition' label='Текстовое определение'
           placeholder='Лингвистическая интерпретация формального выражения'
-          rows={4}
+          height='6.3rem'
           value={textDefinition}
           initialValue={activeCst?.definition_raw ?? ''}
           resolved={activeCst?.definition_resolved ?? ''}
-          disabled={!isEnabled}
-          spellCheck
-          onChange={event => setTextDefinition(event.target.value)}
+          editable={isEnabled}
+          // spellCheck
+          onChange={newValue => setTextDefinition(newValue)}
           onFocus={() => setEditMode(EditMode.TEXT)}
         />
         <TextArea id='convention' label='Конвенция / Комментарий'