diff --git a/README.md b/README.md
index 6d5c9db4..9e089614 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,7 @@ This readme file is used mostly to document project dependencies
   - react-tooltip
   - @uiw/react-codemirror
   - @uiw/codemirror-themes
+  - @lezer/lr
   </pre>
 </details>
 <details>
@@ -45,6 +46,7 @@ This readme file is used mostly to document project dependencies
   - jest
   - ts-jest
   - @types/jest
+  - @lezer/generator
   </pre>
 </details>
 <details>
diff --git a/rsconcept/frontend/package-lock.json b/rsconcept/frontend/package-lock.json
index b22721e1..920083c2 100644
--- a/rsconcept/frontend/package-lock.json
+++ b/rsconcept/frontend/package-lock.json
@@ -8,6 +8,7 @@
       "name": "frontend",
       "version": "1.0.0",
       "dependencies": {
+        "@lezer/lr": "^1.3.9",
         "@uiw/codemirror-themes": "^4.21.9",
         "@uiw/react-codemirror": "^4.21.9",
         "axios": "^1.4.0",
@@ -26,6 +27,7 @@
         "reagraph": "^4.11.1"
       },
       "devDependencies": {
+        "@lezer/generator": "^1.4.0",
         "@types/jest": "^29.5.3",
         "@types/node": "^20.4.5",
         "@types/react": "^18.2.15",
@@ -3681,6 +3683,19 @@
       "resolved": "https://registry.npmjs.org/@lezer/common/-/common-1.0.3.tgz",
       "integrity": "sha512-JH4wAXCgUOcCGNekQPLhVeUtIqjH0yPBs7vvUdSjyQama9618IOKFJwkv2kcqdhF0my8hQEgCTEJU0GIgnahvA=="
     },
+    "node_modules/@lezer/generator": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/@lezer/generator/-/generator-1.4.0.tgz",
+      "integrity": "sha512-X/gB7vr7rEhtPQtgGxK61pMFOt60iXUBvANMq7DNO06PxrY6ZAmEEZIfSX8kfaVO/EVd9xARAsvguYDoShcMWA==",
+      "dev": true,
+      "dependencies": {
+        "@lezer/common": "^1.0.2",
+        "@lezer/lr": "^1.3.0"
+      },
+      "bin": {
+        "lezer-generator": "dist/lezer-generator.cjs"
+      }
+    },
     "node_modules/@lezer/highlight": {
       "version": "1.1.6",
       "resolved": "https://registry.npmjs.org/@lezer/highlight/-/highlight-1.1.6.tgz",
diff --git a/rsconcept/frontend/package.json b/rsconcept/frontend/package.json
index 72777ced..815bf50f 100644
--- a/rsconcept/frontend/package.json
+++ b/rsconcept/frontend/package.json
@@ -4,6 +4,7 @@
   "version": "1.0.0",
   "type": "module",
   "scripts": {
+    "prepare": "lezer-generator src/components/RSInput/rslang.grammar -o src/components/RSInput/rslangparser.ts",
     "test": "jest",
     "dev": "vite",
     "build": "tsc && vite build",
@@ -11,6 +12,7 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@lezer/lr": "^1.3.9",
     "@uiw/codemirror-themes": "^4.21.9",
     "@uiw/react-codemirror": "^4.21.9",
     "axios": "^1.4.0",
@@ -29,6 +31,7 @@
     "reagraph": "^4.11.1"
   },
   "devDependencies": {
+    "@lezer/generator": "^1.4.0",
     "@types/jest": "^29.5.3",
     "@types/node": "^20.4.5",
     "@types/react": "^18.2.15",
diff --git a/rsconcept/frontend/src/components/Common/ConceptDataTable.tsx b/rsconcept/frontend/src/components/Common/ConceptDataTable.tsx
index ea619cfe..34906066 100644
--- a/rsconcept/frontend/src/components/Common/ConceptDataTable.tsx
+++ b/rsconcept/frontend/src/components/Common/ConceptDataTable.tsx
@@ -38,12 +38,21 @@ createTheme('customDark', {
   }
 }, 'dark');
 
+createTheme('customLight', {
+  divider: {
+    default: '#d1d5db'
+  },
+  striped: {
+    default: '#f0f2f7'
+  },
+}, 'light');
+
 function ConceptDataTable<T>({ theme, ...props }: TableProps<T>) {
   const { darkMode } = useConceptTheme();
 
   return (
     <DataTable<T>
-      theme={ theme ?? (darkMode ? 'customDark' : '')}
+      theme={ theme ?? (darkMode ? 'customDark' : 'customLight')}
       {...props}
     />
   );
diff --git a/rsconcept/frontend/src/pages/RSFormPage/elements/RSInput.tsx b/rsconcept/frontend/src/components/RSInput/RSInput.tsx
similarity index 97%
rename from rsconcept/frontend/src/pages/RSFormPage/elements/RSInput.tsx
rename to rsconcept/frontend/src/components/RSInput/RSInput.tsx
index 254c4fa8..88701847 100644
--- a/rsconcept/frontend/src/pages/RSFormPage/elements/RSInput.tsx
+++ b/rsconcept/frontend/src/components/RSInput/RSInput.tsx
@@ -5,7 +5,7 @@ import CodeMirror, { BasicSetupOptions, ReactCodeMirrorProps, ReactCodeMirrorRef
 import { EditorView } from 'codemirror';
 import { Ref, useMemo } from 'react';
 
-import { useConceptTheme } from '../../../context/ThemeContext';
+import { useConceptTheme } from '../../context/ThemeContext';
 
 const editorSetup: BasicSetupOptions = {
   highlightSpecialChars: true,
diff --git a/rsconcept/frontend/src/components/RSInput/highlight.ts b/rsconcept/frontend/src/components/RSInput/highlight.ts
new file mode 100644
index 00000000..27746107
--- /dev/null
+++ b/rsconcept/frontend/src/components/RSInput/highlight.ts
@@ -0,0 +1,7 @@
+import {styleTags, tags} from '@lezer/highlight';
+
+export const highlighting = styleTags({
+  Identifier: tags.name,
+  Number: tags.number,
+  String: tags.string
+});
\ No newline at end of file
diff --git a/rsconcept/frontend/src/components/RSInput/rslang.grammar b/rsconcept/frontend/src/components/RSInput/rslang.grammar
new file mode 100644
index 00000000..aa478c22
--- /dev/null
+++ b/rsconcept/frontend/src/components/RSInput/rslang.grammar
@@ -0,0 +1,20 @@
+@top Program { expression* }
+
+@skip { space }
+
+expression {
+  Identifier |
+  String |
+  Application { "(" expression* ")" }
+}
+
+@tokens {
+  space { @whitespace+ }
+  Identifier { $[a-zA-Z_\-0-9]+ }
+  String { '"' (!["\\] | "\\" _)* '"' }
+  "(" ")"
+}
+
+@detectDelim
+
+@external propSource highlighting from "./highlight.ts"
\ No newline at end of file
diff --git a/rsconcept/frontend/src/components/RSInput/rslangparser.terms.ts b/rsconcept/frontend/src/components/RSInput/rslangparser.terms.ts
new file mode 100644
index 00000000..2e607541
--- /dev/null
+++ b/rsconcept/frontend/src/components/RSInput/rslangparser.terms.ts
@@ -0,0 +1,5 @@
+// This file was generated by lezer-generator. You probably shouldn't edit it.
+export const
+  Program = 1,
+  Identifier = 2,
+  String = 3
diff --git a/rsconcept/frontend/src/components/RSInput/rslangparser.ts b/rsconcept/frontend/src/components/RSInput/rslangparser.ts
new file mode 100644
index 00000000..4f74c8be
--- /dev/null
+++ b/rsconcept/frontend/src/components/RSInput/rslangparser.ts
@@ -0,0 +1,22 @@
+// This file was generated by lezer-generator. You probably shouldn't edit it.
+import {LRParser} from "@lezer/lr"
+import {highlighting} from "./highlight.ts"
+export const parser = LRParser.deserialize({
+  version: 14,
+  states: "!WQVQPOOObQPO'#CbOOQO'#Cg'#CgOOQO'#Cc'#CcQVQPOOOOQO,58|,58|OpQPO,58|OOQO-E6a-E6aOOQO1G.h1G.h",
+  stateData: "!O~OYOS~OQQORQOTPO~OQQORQOSTOTPO~OQQORQOSWOTPO~O",
+  goto: "s[PPPPPP]cPPPmXQOPSUQSOQUPTVSUXROPSU",
+  nodeNames: "⚠ Program Identifier String ) ( Application",
+  maxTerm: 11,
+  nodeProps: [
+    ["openedBy", 4,"("],
+    ["closedBy", 5,")"]
+  ],
+  propSources: [highlighting],
+  skippedNodes: [0],
+  repeatNodeCount: 1,
+  tokenData: "%[~RbX^!Zpq!Zrs#Oxy$lyz$q}!O$v!Q![$v!c!}$v#R#S$v#T#o$v#y#z!Z$f$g!Z#BY#BZ!Z$IS$I_!Z$I|$JO!Z$JT$JU!Z$KV$KW!Z&FU&FV!Z~!`YY~X^!Zpq!Z#y#z!Z$f$g!Z#BY#BZ!Z$IS$I_!Z$I|$JO!Z$JT$JU!Z$KV$KW!Z&FU&FV!Z~#RVOr#Ors#hs#O#O#O#P#m#P;'S#O;'S;=`$f<%lO#O~#mOR~~#pRO;'S#O;'S;=`#y;=`O#O~#|WOr#Ors#hs#O#O#O#P#m#P;'S#O;'S;=`$f;=`<%l#O<%lO#O~$iP;=`<%l#O~$qOT~~$vOS~~${TQ~}!O$v!Q![$v!c!}$v#R#S$v#T#o$v",
+  tokenizers: [0],
+  topRules: {"Program":[0,1]},
+  tokenPrec: 0
+})
diff --git a/rsconcept/frontend/src/pages/RSFormPage/elements/textEditing.ts b/rsconcept/frontend/src/components/RSInput/textEditing.ts
similarity index 99%
rename from rsconcept/frontend/src/pages/RSFormPage/elements/textEditing.ts
rename to rsconcept/frontend/src/components/RSInput/textEditing.ts
index 772462ad..8e90fa04 100644
--- a/rsconcept/frontend/src/pages/RSFormPage/elements/textEditing.ts
+++ b/rsconcept/frontend/src/components/RSInput/textEditing.ts
@@ -2,7 +2,7 @@
 
 import { ReactCodeMirrorRef } from '@uiw/react-codemirror';
 
-import { TokenID } from '../../../utils/enums';
+import { TokenID } from '../../utils/enums';
 
 export function getSymbolSubstitute(input: string): string | undefined {
   switch (input) {
diff --git a/rsconcept/frontend/src/pages/RSFormPage/EditorRSExpression.tsx b/rsconcept/frontend/src/pages/RSFormPage/EditorRSExpression.tsx
index b62330c0..3fa6df1d 100644
--- a/rsconcept/frontend/src/pages/RSFormPage/EditorRSExpression.tsx
+++ b/rsconcept/frontend/src/pages/RSFormPage/EditorRSExpression.tsx
@@ -4,17 +4,17 @@ import { useCallback, useLayoutEffect, useMemo, useRef, useState } from 'react';
 import Button from '../../components/Common/Button';
 import Label from '../../components/Common/Label';
 import { Loader } from '../../components/Common/Loader';
+import RSInput from '../../components/RSInput/RSInput';
+import { getSymbolSubstitute, TextWrapper } from '../../components/RSInput/textEditing';
 import { useRSForm } from '../../context/RSFormContext';
 import useCheckExpression from '../../hooks/useCheckExpression';
 import { TokenID } from '../../utils/enums';
 import { IConstituenta, IRSErrorDescription, SyntaxTree } from '../../utils/models';
 import { getCstExpressionPrefix, getTypificationLabel } from '../../utils/staticUI';
 import ParsingResult from './elements/ParsingResult';
-import RSInput from './elements/RSInput';
 import RSLocalButton from './elements/RSLocalButton';
 import RSTokenButton from './elements/RSTokenButton';
 import StatusBar from './elements/StatusBar';
-import { getSymbolSubstitute, TextWrapper } from './elements/textEditing';
 
 interface EditorRSExpressionProps {
   id: string