diff --git a/grammar.js b/grammar.js
index 360ab7d..70a9844 100644
--- a/grammar.js
+++ b/grammar.js
@@ -28,11 +28,16 @@ module.exports = grammar({
     comment: _ => /\#[^\n]*/,
 
     identifier: _ => /[A-Za-z_][A-Za-z0-9_]*/,
+    variable: $ => seq('$', choice(
+      $.identifier,
+      seq('{', $.identifier, '}')
+    )),
 
     _value: $ => choice(
       $.string,
       $.number,
       $.boolean,
+      $.variable,
       $.value,
     ),
 
@@ -51,7 +56,10 @@ module.exports = grammar({
 
     _string: $ => seq(
       '"',
-      optional(alias(/[^"]+/, $.string_content)),
+      optional(repeat(choice(
+        alias(/[^"\$]+/, $.string_content),
+        $.variable
+      ))),
       '"',
     ),
 
@@ -73,6 +81,6 @@ module.exports = grammar({
 
     boolean: _ => token(choice('true', 'false')),
 
-    value: _ => /[^\#\s\"\']+/,
+    value: _ => /[^\#\s\"\'\$]+/,
   },
 });
diff --git a/src/grammar.json b/src/grammar.json
index 377156b..21d87e9 100644
--- a/src/grammar.json
+++ b/src/grammar.json
@@ -62,6 +62,41 @@
       "type": "PATTERN",
       "value": "[A-Za-z_][A-Za-z0-9_]*"
     },
+    "variable": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "$"
+        },
+        {
+          "type": "CHOICE",
+          "members": [
+            {
+              "type": "SYMBOL",
+              "name": "identifier"
+            },
+            {
+              "type": "SEQ",
+              "members": [
+                {
+                  "type": "STRING",
+                  "value": "{"
+                },
+                {
+                  "type": "SYMBOL",
+                  "name": "identifier"
+                },
+                {
+                  "type": "STRING",
+                  "value": "}"
+                }
+              ]
+            }
+          ]
+        }
+      ]
+    },
     "_value": {
       "type": "CHOICE",
       "members": [
@@ -77,6 +112,10 @@
           "type": "SYMBOL",
           "name": "boolean"
         },
+        {
+          "type": "SYMBOL",
+          "name": "variable"
+        },
         {
           "type": "SYMBOL",
           "name": "value"
@@ -137,13 +176,25 @@
           "type": "CHOICE",
           "members": [
             {
-              "type": "ALIAS",
+              "type": "REPEAT",
               "content": {
-                "type": "PATTERN",
-                "value": "[^\"]+"
-              },
-              "named": true,
-              "value": "string_content"
+                "type": "CHOICE",
+                "members": [
+                  {
+                    "type": "ALIAS",
+                    "content": {
+                      "type": "PATTERN",
+                      "value": "[^\"\\$]+"
+                    },
+                    "named": true,
+                    "value": "string_content"
+                  },
+                  {
+                    "type": "SYMBOL",
+                    "name": "variable"
+                  }
+                ]
+              }
             },
             {
               "type": "BLANK"
@@ -224,7 +275,7 @@
     },
     "value": {
       "type": "PATTERN",
-      "value": "[^\\#\\s\\\"\\']+"
+      "value": "[^\\#\\s\\\"\\'\\$]+"
     }
   },
   "extras": [
diff --git a/src/node-types.json b/src/node-types.json
index 1813de3..4d57c9d 100644
--- a/src/node-types.json
+++ b/src/node-types.json
@@ -32,6 +32,10 @@
           {
             "type": "value",
             "named": true
+          },
+          {
+            "type": "variable",
+            "named": true
           }
         ]
       }
@@ -99,12 +103,31 @@
     "named": true,
     "fields": {},
     "children": {
-      "multiple": false,
+      "multiple": true,
       "required": false,
       "types": [
         {
           "type": "string_content",
           "named": true
+        },
+        {
+          "type": "variable",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "variable",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": true,
+      "types": [
+        {
+          "type": "identifier",
+          "named": true
         }
       ]
     }
@@ -113,6 +136,10 @@
     "type": "\"",
     "named": false
   },
+  {
+    "type": "$",
+    "named": false
+  },
   {
     "type": "'",
     "named": false
@@ -152,5 +179,13 @@
   {
     "type": "value",
     "named": true
+  },
+  {
+    "type": "{",
+    "named": false
+  },
+  {
+    "type": "}",
+    "named": false
   }
 ]
\ No newline at end of file
diff --git a/src/parser.c b/src/parser.c
index d1192fd..5401092 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -5,11 +5,11 @@
 #endif
 
 #define LANGUAGE_VERSION 14
-#define STATE_COUNT 21
+#define STATE_COUNT 32
 #define LARGE_STATE_COUNT 3
-#define SYMBOL_COUNT 23
+#define SYMBOL_COUNT 28
 #define ALIAS_COUNT 0
-#define TOKEN_COUNT 14
+#define TOKEN_COUNT 17
 #define EXTERNAL_TOKEN_COUNT 1
 #define FIELD_COUNT 2
 #define MAX_ALIAS_SEQUENCE_LENGTH 4
@@ -19,25 +19,30 @@ enum ts_symbol_identifiers {
   anon_sym_EQ = 1,
   sym_comment = 2,
   sym_identifier = 3,
-  anon_sym_SQUOTE = 4,
-  aux_sym__literal_string_token1 = 5,
-  anon_sym_DQUOTE = 6,
-  aux_sym__string_token1 = 7,
-  sym_decimal = 8,
-  sym_hexadecimal = 9,
-  sym_float = 10,
-  sym_boolean = 11,
-  sym_value = 12,
-  sym__end_of_assignment = 13,
-  sym_document = 14,
-  sym_assignment = 15,
-  sym__value = 16,
-  sym_string = 17,
-  sym__literal_string = 18,
-  sym__string = 19,
-  sym_number = 20,
-  sym_integer = 21,
-  aux_sym_document_repeat1 = 22,
+  anon_sym_DOLLAR = 4,
+  anon_sym_LBRACE = 5,
+  anon_sym_RBRACE = 6,
+  anon_sym_SQUOTE = 7,
+  aux_sym__literal_string_token1 = 8,
+  anon_sym_DQUOTE = 9,
+  aux_sym__string_token1 = 10,
+  sym_decimal = 11,
+  sym_hexadecimal = 12,
+  sym_float = 13,
+  sym_boolean = 14,
+  sym_value = 15,
+  sym__end_of_assignment = 16,
+  sym_document = 17,
+  sym_assignment = 18,
+  sym_variable = 19,
+  sym__value = 20,
+  sym_string = 21,
+  sym__literal_string = 22,
+  sym__string = 23,
+  sym_number = 24,
+  sym_integer = 25,
+  aux_sym_document_repeat1 = 26,
+  aux_sym__string_repeat1 = 27,
 };
 
 static const char * const ts_symbol_names[] = {
@@ -45,6 +50,9 @@ static const char * const ts_symbol_names[] = {
   [anon_sym_EQ] = "=",
   [sym_comment] = "comment",
   [sym_identifier] = "identifier",
+  [anon_sym_DOLLAR] = "$",
+  [anon_sym_LBRACE] = "{",
+  [anon_sym_RBRACE] = "}",
   [anon_sym_SQUOTE] = "'",
   [aux_sym__literal_string_token1] = "string_content",
   [anon_sym_DQUOTE] = "\"",
@@ -57,6 +65,7 @@ static const char * const ts_symbol_names[] = {
   [sym__end_of_assignment] = "_end_of_assignment",
   [sym_document] = "document",
   [sym_assignment] = "assignment",
+  [sym_variable] = "variable",
   [sym__value] = "_value",
   [sym_string] = "string",
   [sym__literal_string] = "_literal_string",
@@ -64,6 +73,7 @@ static const char * const ts_symbol_names[] = {
   [sym_number] = "number",
   [sym_integer] = "integer",
   [aux_sym_document_repeat1] = "document_repeat1",
+  [aux_sym__string_repeat1] = "_string_repeat1",
 };
 
 static const TSSymbol ts_symbol_map[] = {
@@ -71,6 +81,9 @@ static const TSSymbol ts_symbol_map[] = {
   [anon_sym_EQ] = anon_sym_EQ,
   [sym_comment] = sym_comment,
   [sym_identifier] = sym_identifier,
+  [anon_sym_DOLLAR] = anon_sym_DOLLAR,
+  [anon_sym_LBRACE] = anon_sym_LBRACE,
+  [anon_sym_RBRACE] = anon_sym_RBRACE,
   [anon_sym_SQUOTE] = anon_sym_SQUOTE,
   [aux_sym__literal_string_token1] = aux_sym__literal_string_token1,
   [anon_sym_DQUOTE] = anon_sym_DQUOTE,
@@ -83,6 +96,7 @@ static const TSSymbol ts_symbol_map[] = {
   [sym__end_of_assignment] = sym__end_of_assignment,
   [sym_document] = sym_document,
   [sym_assignment] = sym_assignment,
+  [sym_variable] = sym_variable,
   [sym__value] = sym__value,
   [sym_string] = sym_string,
   [sym__literal_string] = sym__literal_string,
@@ -90,6 +104,7 @@ static const TSSymbol ts_symbol_map[] = {
   [sym_number] = sym_number,
   [sym_integer] = sym_integer,
   [aux_sym_document_repeat1] = aux_sym_document_repeat1,
+  [aux_sym__string_repeat1] = aux_sym__string_repeat1,
 };
 
 static const TSSymbolMetadata ts_symbol_metadata[] = {
@@ -109,6 +124,18 @@ static const TSSymbolMetadata ts_symbol_metadata[] = {
     .visible = true,
     .named = true,
   },
+  [anon_sym_DOLLAR] = {
+    .visible = true,
+    .named = false,
+  },
+  [anon_sym_LBRACE] = {
+    .visible = true,
+    .named = false,
+  },
+  [anon_sym_RBRACE] = {
+    .visible = true,
+    .named = false,
+  },
   [anon_sym_SQUOTE] = {
     .visible = true,
     .named = false,
@@ -157,6 +184,10 @@ static const TSSymbolMetadata ts_symbol_metadata[] = {
     .visible = true,
     .named = true,
   },
+  [sym_variable] = {
+    .visible = true,
+    .named = true,
+  },
   [sym__value] = {
     .visible = false,
     .named = true,
@@ -185,6 +216,10 @@ static const TSSymbolMetadata ts_symbol_metadata[] = {
     .visible = false,
     .named = false,
   },
+  [aux_sym__string_repeat1] = {
+    .visible = false,
+    .named = false,
+  },
 };
 
 enum ts_field_identifiers {
@@ -234,13 +269,24 @@ static const TSStateId ts_primary_state_ids[STATE_COUNT] = {
   [11] = 11,
   [12] = 12,
   [13] = 13,
-  [14] = 14,
+  [14] = 13,
   [15] = 15,
   [16] = 16,
   [17] = 17,
   [18] = 18,
   [19] = 19,
   [20] = 20,
+  [21] = 10,
+  [22] = 22,
+  [23] = 23,
+  [24] = 24,
+  [25] = 25,
+  [26] = 26,
+  [27] = 11,
+  [28] = 28,
+  [29] = 29,
+  [30] = 23,
+  [31] = 29,
 };
 
 static bool ts_lex(TSLexer *lexer, TSStateId state) {
@@ -250,66 +296,71 @@ static bool ts_lex(TSLexer *lexer, TSStateId state) {
     case 0:
       if (eof) ADVANCE(9);
       ADVANCE_MAP(
-        '"', 22,
+        '"', 25,
         '#', 11,
-        '\'', 19,
+        '$', 19,
+        '\'', 22,
         '-', 5,
         '0', 4,
         '=', 10,
         'f', 12,
         't', 15,
+        '{', 20,
+        '}', 21,
       );
       if (('\t' <= lookahead && lookahead <= '\r') ||
           lookahead == ' ') SKIP(0);
-      if (('1' <= lookahead && lookahead <= '9')) ADVANCE(25);
+      if (('1' <= lookahead && lookahead <= '9')) ADVANCE(28);
       if (('A' <= lookahead && lookahead <= 'Z') ||
           lookahead == '_' ||
           ('a' <= lookahead && lookahead <= 'z')) ADVANCE(18);
       END_STATE();
     case 1:
-      if (lookahead == '"') ADVANCE(22);
-      if (lookahead == '\'') ADVANCE(19);
-      if (lookahead == '-') ADVANCE(39);
-      if (lookahead == '0') ADVANCE(38);
-      if (lookahead == 'f') ADVANCE(32);
-      if (lookahead == 't') ADVANCE(35);
+      if (lookahead == '"') ADVANCE(25);
+      if (lookahead == '$') ADVANCE(19);
+      if (lookahead == '\'') ADVANCE(22);
+      if (lookahead == '-') ADVANCE(42);
+      if (lookahead == '0') ADVANCE(41);
+      if (lookahead == 'f') ADVANCE(35);
+      if (lookahead == 't') ADVANCE(38);
       if (('\t' <= lookahead && lookahead <= '\r') ||
           lookahead == ' ') SKIP(1);
-      if (('1' <= lookahead && lookahead <= '9')) ADVANCE(26);
+      if (('1' <= lookahead && lookahead <= '9')) ADVANCE(29);
       if (lookahead != 0 &&
-          lookahead != '"' &&
-          lookahead != '#') ADVANCE(42);
+          (lookahead < '"' || '$' < lookahead)) ADVANCE(45);
       END_STATE();
     case 2:
-      if (lookahead == '"') ADVANCE(22);
+      if (lookahead == '"') ADVANCE(25);
+      if (lookahead == '$') ADVANCE(19);
+      if (('\t' <= lookahead && lookahead <= '\r') ||
+          lookahead == ' ') ADVANCE(26);
+      if (lookahead != 0) ADVANCE(27);
+      END_STATE();
+    case 3:
+      if (lookahead == '\'') ADVANCE(22);
       if (('\t' <= lookahead && lookahead <= '\r') ||
           lookahead == ' ') ADVANCE(23);
       if (lookahead != 0) ADVANCE(24);
       END_STATE();
-    case 3:
-      if (lookahead == '\'') ADVANCE(19);
-      if (('\t' <= lookahead && lookahead <= '\r') ||
-          lookahead == ' ') ADVANCE(20);
-      if (lookahead != 0) ADVANCE(21);
-      END_STATE();
     case 4:
       if (lookahead == 'X' ||
           lookahead == 'x') ADVANCE(7);
       END_STATE();
     case 5:
-      if (('1' <= lookahead && lookahead <= '9')) ADVANCE(25);
+      if (('1' <= lookahead && lookahead <= '9')) ADVANCE(28);
       END_STATE();
     case 6:
-      if (('0' <= lookahead && lookahead <= '9')) ADVANCE(29);
+      if (('0' <= lookahead && lookahead <= '9')) ADVANCE(32);
       END_STATE();
     case 7:
       if (('0' <= lookahead && lookahead <= '9') ||
           ('A' <= lookahead && lookahead <= 'F') ||
-          ('a' <= lookahead && lookahead <= 'f')) ADVANCE(27);
+          ('a' <= lookahead && lookahead <= 'f')) ADVANCE(30);
       END_STATE();
     case 8:
       if (eof) ADVANCE(9);
       if (lookahead == '#') ADVANCE(11);
+      if (lookahead == '{') ADVANCE(20);
       if (('\t' <= lookahead && lookahead <= '\r') ||
           lookahead == ' ') SKIP(8);
       if (('A' <= lookahead && lookahead <= 'Z') ||
@@ -383,203 +434,199 @@ static bool ts_lex(TSLexer *lexer, TSStateId state) {
           ('a' <= lookahead && lookahead <= 'z')) ADVANCE(18);
       END_STATE();
     case 19:
-      ACCEPT_TOKEN(anon_sym_SQUOTE);
+      ACCEPT_TOKEN(anon_sym_DOLLAR);
       END_STATE();
     case 20:
-      ACCEPT_TOKEN(aux_sym__literal_string_token1);
-      if (('\t' <= lookahead && lookahead <= '\r') ||
-          lookahead == ' ') ADVANCE(20);
-      if (lookahead != 0 &&
-          lookahead != '\'') ADVANCE(21);
+      ACCEPT_TOKEN(anon_sym_LBRACE);
       END_STATE();
     case 21:
-      ACCEPT_TOKEN(aux_sym__literal_string_token1);
-      if (lookahead != 0 &&
-          lookahead != '\'') ADVANCE(21);
+      ACCEPT_TOKEN(anon_sym_RBRACE);
       END_STATE();
     case 22:
-      ACCEPT_TOKEN(anon_sym_DQUOTE);
+      ACCEPT_TOKEN(anon_sym_SQUOTE);
       END_STATE();
     case 23:
-      ACCEPT_TOKEN(aux_sym__string_token1);
+      ACCEPT_TOKEN(aux_sym__literal_string_token1);
       if (('\t' <= lookahead && lookahead <= '\r') ||
           lookahead == ' ') ADVANCE(23);
       if (lookahead != 0 &&
-          lookahead != '"') ADVANCE(24);
+          lookahead != '\'') ADVANCE(24);
       END_STATE();
     case 24:
-      ACCEPT_TOKEN(aux_sym__string_token1);
+      ACCEPT_TOKEN(aux_sym__literal_string_token1);
       if (lookahead != 0 &&
-          lookahead != '"') ADVANCE(24);
+          lookahead != '\'') ADVANCE(24);
       END_STATE();
     case 25:
-      ACCEPT_TOKEN(sym_decimal);
-      if (lookahead == '.') ADVANCE(6);
-      if (('0' <= lookahead && lookahead <= '9')) ADVANCE(25);
+      ACCEPT_TOKEN(anon_sym_DQUOTE);
       END_STATE();
     case 26:
-      ACCEPT_TOKEN(sym_decimal);
-      if (lookahead == '.') ADVANCE(40);
-      if (('0' <= lookahead && lookahead <= '9')) ADVANCE(26);
+      ACCEPT_TOKEN(aux_sym__string_token1);
+      if (('\t' <= lookahead && lookahead <= '\r') ||
+          lookahead == ' ') ADVANCE(26);
       if (lookahead != 0 &&
-          (lookahead < '\t' || '\r' < lookahead) &&
-          lookahead != ' ' &&
           lookahead != '"' &&
-          lookahead != '#' &&
-          lookahead != '\'') ADVANCE(42);
+          lookahead != '$') ADVANCE(27);
       END_STATE();
     case 27:
-      ACCEPT_TOKEN(sym_hexadecimal);
-      if (('0' <= lookahead && lookahead <= '9') ||
-          ('A' <= lookahead && lookahead <= 'F') ||
-          ('a' <= lookahead && lookahead <= 'f')) ADVANCE(27);
+      ACCEPT_TOKEN(aux_sym__string_token1);
+      if (lookahead != 0 &&
+          lookahead != '"' &&
+          lookahead != '$') ADVANCE(27);
       END_STATE();
     case 28:
+      ACCEPT_TOKEN(sym_decimal);
+      if (lookahead == '.') ADVANCE(6);
+      if (('0' <= lookahead && lookahead <= '9')) ADVANCE(28);
+      END_STATE();
+    case 29:
+      ACCEPT_TOKEN(sym_decimal);
+      if (lookahead == '.') ADVANCE(43);
+      if (('0' <= lookahead && lookahead <= '9')) ADVANCE(29);
+      if (lookahead != 0 &&
+          (lookahead < '\t' || '\r' < lookahead) &&
+          lookahead != ' ' &&
+          (lookahead < '"' || '$' < lookahead) &&
+          lookahead != '\'') ADVANCE(45);
+      END_STATE();
+    case 30:
       ACCEPT_TOKEN(sym_hexadecimal);
       if (('0' <= lookahead && lookahead <= '9') ||
           ('A' <= lookahead && lookahead <= 'F') ||
-          ('a' <= lookahead && lookahead <= 'f')) ADVANCE(28);
-      if (lookahead != 0 &&
-          (lookahead < '\t' || '\r' < lookahead) &&
-          lookahead != ' ' &&
-          lookahead != '"' &&
-          lookahead != '#' &&
-          lookahead != '\'') ADVANCE(42);
-      END_STATE();
-    case 29:
-      ACCEPT_TOKEN(sym_float);
-      if (('0' <= lookahead && lookahead <= '9')) ADVANCE(29);
-      END_STATE();
-    case 30:
-      ACCEPT_TOKEN(sym_float);
-      if (('0' <= lookahead && lookahead <= '9')) ADVANCE(30);
-      if (lookahead != 0 &&
-          (lookahead < '\t' || '\r' < lookahead) &&
-          lookahead != ' ' &&
-          lookahead != '"' &&
-          lookahead != '#' &&
-          lookahead != '\'') ADVANCE(42);
+          ('a' <= lookahead && lookahead <= 'f')) ADVANCE(30);
       END_STATE();
     case 31:
+      ACCEPT_TOKEN(sym_hexadecimal);
+      if (('0' <= lookahead && lookahead <= '9') ||
+          ('A' <= lookahead && lookahead <= 'F') ||
+          ('a' <= lookahead && lookahead <= 'f')) ADVANCE(31);
+      if (lookahead != 0 &&
+          (lookahead < '\t' || '\r' < lookahead) &&
+          lookahead != ' ' &&
+          (lookahead < '"' || '$' < lookahead) &&
+          lookahead != '\'') ADVANCE(45);
+      END_STATE();
+    case 32:
+      ACCEPT_TOKEN(sym_float);
+      if (('0' <= lookahead && lookahead <= '9')) ADVANCE(32);
+      END_STATE();
+    case 33:
+      ACCEPT_TOKEN(sym_float);
+      if (('0' <= lookahead && lookahead <= '9')) ADVANCE(33);
+      if (lookahead != 0 &&
+          (lookahead < '\t' || '\r' < lookahead) &&
+          lookahead != ' ' &&
+          (lookahead < '"' || '$' < lookahead) &&
+          lookahead != '\'') ADVANCE(45);
+      END_STATE();
+    case 34:
       ACCEPT_TOKEN(sym_boolean);
       if (lookahead != 0 &&
           (lookahead < '\t' || '\r' < lookahead) &&
           lookahead != ' ' &&
-          lookahead != '"' &&
-          lookahead != '#' &&
-          lookahead != '\'') ADVANCE(42);
-      END_STATE();
-    case 32:
-      ACCEPT_TOKEN(sym_value);
-      if (lookahead == 'a') ADVANCE(34);
-      if (lookahead != 0 &&
-          (lookahead < '\t' || '\r' < lookahead) &&
-          lookahead != ' ' &&
-          lookahead != '"' &&
-          lookahead != '#' &&
-          lookahead != '\'') ADVANCE(42);
-      END_STATE();
-    case 33:
-      ACCEPT_TOKEN(sym_value);
-      if (lookahead == 'e') ADVANCE(31);
-      if (lookahead != 0 &&
-          (lookahead < '\t' || '\r' < lookahead) &&
-          lookahead != ' ' &&
-          lookahead != '"' &&
-          lookahead != '#' &&
-          lookahead != '\'') ADVANCE(42);
-      END_STATE();
-    case 34:
-      ACCEPT_TOKEN(sym_value);
-      if (lookahead == 'l') ADVANCE(36);
-      if (lookahead != 0 &&
-          (lookahead < '\t' || '\r' < lookahead) &&
-          lookahead != ' ' &&
-          lookahead != '"' &&
-          lookahead != '#' &&
-          lookahead != '\'') ADVANCE(42);
+          (lookahead < '"' || '$' < lookahead) &&
+          lookahead != '\'') ADVANCE(45);
       END_STATE();
     case 35:
       ACCEPT_TOKEN(sym_value);
-      if (lookahead == 'r') ADVANCE(37);
+      if (lookahead == 'a') ADVANCE(37);
       if (lookahead != 0 &&
           (lookahead < '\t' || '\r' < lookahead) &&
           lookahead != ' ' &&
-          lookahead != '"' &&
-          lookahead != '#' &&
-          lookahead != '\'') ADVANCE(42);
+          (lookahead < '"' || '$' < lookahead) &&
+          lookahead != '\'') ADVANCE(45);
       END_STATE();
     case 36:
       ACCEPT_TOKEN(sym_value);
-      if (lookahead == 's') ADVANCE(33);
+      if (lookahead == 'e') ADVANCE(34);
       if (lookahead != 0 &&
           (lookahead < '\t' || '\r' < lookahead) &&
           lookahead != ' ' &&
-          lookahead != '"' &&
-          lookahead != '#' &&
-          lookahead != '\'') ADVANCE(42);
+          (lookahead < '"' || '$' < lookahead) &&
+          lookahead != '\'') ADVANCE(45);
       END_STATE();
     case 37:
       ACCEPT_TOKEN(sym_value);
-      if (lookahead == 'u') ADVANCE(33);
+      if (lookahead == 'l') ADVANCE(39);
       if (lookahead != 0 &&
           (lookahead < '\t' || '\r' < lookahead) &&
           lookahead != ' ' &&
-          lookahead != '"' &&
-          lookahead != '#' &&
-          lookahead != '\'') ADVANCE(42);
+          (lookahead < '"' || '$' < lookahead) &&
+          lookahead != '\'') ADVANCE(45);
       END_STATE();
     case 38:
       ACCEPT_TOKEN(sym_value);
-      if (lookahead == 'X' ||
-          lookahead == 'x') ADVANCE(41);
+      if (lookahead == 'r') ADVANCE(40);
       if (lookahead != 0 &&
           (lookahead < '\t' || '\r' < lookahead) &&
           lookahead != ' ' &&
-          lookahead != '"' &&
-          lookahead != '#' &&
-          lookahead != '\'') ADVANCE(42);
+          (lookahead < '"' || '$' < lookahead) &&
+          lookahead != '\'') ADVANCE(45);
       END_STATE();
     case 39:
       ACCEPT_TOKEN(sym_value);
-      if (('1' <= lookahead && lookahead <= '9')) ADVANCE(26);
+      if (lookahead == 's') ADVANCE(36);
       if (lookahead != 0 &&
           (lookahead < '\t' || '\r' < lookahead) &&
           lookahead != ' ' &&
-          lookahead != '"' &&
-          lookahead != '#' &&
-          lookahead != '\'') ADVANCE(42);
+          (lookahead < '"' || '$' < lookahead) &&
+          lookahead != '\'') ADVANCE(45);
       END_STATE();
     case 40:
       ACCEPT_TOKEN(sym_value);
-      if (('0' <= lookahead && lookahead <= '9')) ADVANCE(30);
+      if (lookahead == 'u') ADVANCE(36);
       if (lookahead != 0 &&
           (lookahead < '\t' || '\r' < lookahead) &&
           lookahead != ' ' &&
-          lookahead != '"' &&
-          lookahead != '#' &&
-          lookahead != '\'') ADVANCE(42);
+          (lookahead < '"' || '$' < lookahead) &&
+          lookahead != '\'') ADVANCE(45);
       END_STATE();
     case 41:
       ACCEPT_TOKEN(sym_value);
-      if (('0' <= lookahead && lookahead <= '9') ||
-          ('A' <= lookahead && lookahead <= 'F') ||
-          ('a' <= lookahead && lookahead <= 'f')) ADVANCE(28);
+      if (lookahead == 'X' ||
+          lookahead == 'x') ADVANCE(44);
       if (lookahead != 0 &&
           (lookahead < '\t' || '\r' < lookahead) &&
           lookahead != ' ' &&
-          lookahead != '"' &&
-          lookahead != '#' &&
-          lookahead != '\'') ADVANCE(42);
+          (lookahead < '"' || '$' < lookahead) &&
+          lookahead != '\'') ADVANCE(45);
       END_STATE();
     case 42:
+      ACCEPT_TOKEN(sym_value);
+      if (('1' <= lookahead && lookahead <= '9')) ADVANCE(29);
+      if (lookahead != 0 &&
+          (lookahead < '\t' || '\r' < lookahead) &&
+          lookahead != ' ' &&
+          (lookahead < '"' || '$' < lookahead) &&
+          lookahead != '\'') ADVANCE(45);
+      END_STATE();
+    case 43:
+      ACCEPT_TOKEN(sym_value);
+      if (('0' <= lookahead && lookahead <= '9')) ADVANCE(33);
+      if (lookahead != 0 &&
+          (lookahead < '\t' || '\r' < lookahead) &&
+          lookahead != ' ' &&
+          (lookahead < '"' || '$' < lookahead) &&
+          lookahead != '\'') ADVANCE(45);
+      END_STATE();
+    case 44:
+      ACCEPT_TOKEN(sym_value);
+      if (('0' <= lookahead && lookahead <= '9') ||
+          ('A' <= lookahead && lookahead <= 'F') ||
+          ('a' <= lookahead && lookahead <= 'f')) ADVANCE(31);
+      if (lookahead != 0 &&
+          (lookahead < '\t' || '\r' < lookahead) &&
+          lookahead != ' ' &&
+          (lookahead < '"' || '$' < lookahead) &&
+          lookahead != '\'') ADVANCE(45);
+      END_STATE();
+    case 45:
       ACCEPT_TOKEN(sym_value);
       if (lookahead != 0 &&
           (lookahead < '\t' || '\r' < lookahead) &&
           lookahead != ' ' &&
-          lookahead != '"' &&
-          lookahead != '#' &&
-          lookahead != '\'') ADVANCE(42);
+          (lookahead < '"' || '$' < lookahead) &&
+          lookahead != '\'') ADVANCE(45);
       END_STATE();
     default:
       return false;
@@ -592,22 +639,33 @@ static const TSLexMode ts_lex_modes[STATE_COUNT] = {
   [2] = {.lex_state = 1, .external_lex_state = 1},
   [3] = {.lex_state = 8},
   [4] = {.lex_state = 8},
-  [5] = {.lex_state = 8},
-  [6] = {.lex_state = 8},
-  [7] = {.lex_state = 3},
-  [8] = {.lex_state = 2},
-  [9] = {.lex_state = 0},
-  [10] = {.lex_state = 0},
-  [11] = {.lex_state = 0, .external_lex_state = 1},
-  [12] = {.lex_state = 0, .external_lex_state = 1},
-  [13] = {.lex_state = 0, .external_lex_state = 1},
-  [14] = {.lex_state = 0, .external_lex_state = 1},
+  [5] = {.lex_state = 2},
+  [6] = {.lex_state = 2},
+  [7] = {.lex_state = 2},
+  [8] = {.lex_state = 8},
+  [9] = {.lex_state = 8},
+  [10] = {.lex_state = 2},
+  [11] = {.lex_state = 2},
+  [12] = {.lex_state = 3},
+  [13] = {.lex_state = 8},
+  [14] = {.lex_state = 8},
   [15] = {.lex_state = 0},
-  [16] = {.lex_state = 0, .external_lex_state = 1},
-  [17] = {.lex_state = 0},
+  [16] = {.lex_state = 0},
+  [17] = {.lex_state = 0, .external_lex_state = 1},
   [18] = {.lex_state = 0, .external_lex_state = 1},
   [19] = {.lex_state = 0, .external_lex_state = 1},
   [20] = {.lex_state = 0, .external_lex_state = 1},
+  [21] = {.lex_state = 0, .external_lex_state = 1},
+  [22] = {.lex_state = 0, .external_lex_state = 1},
+  [23] = {.lex_state = 0},
+  [24] = {.lex_state = 0, .external_lex_state = 1},
+  [25] = {.lex_state = 0, .external_lex_state = 1},
+  [26] = {.lex_state = 0},
+  [27] = {.lex_state = 0, .external_lex_state = 1},
+  [28] = {.lex_state = 0, .external_lex_state = 1},
+  [29] = {.lex_state = 8},
+  [30] = {.lex_state = 0},
+  [31] = {.lex_state = 8},
 };
 
 static const uint16_t ts_parse_table[LARGE_STATE_COUNT][SYMBOL_COUNT] = {
@@ -616,6 +674,9 @@ static const uint16_t ts_parse_table[LARGE_STATE_COUNT][SYMBOL_COUNT] = {
     [anon_sym_EQ] = ACTIONS(1),
     [sym_comment] = ACTIONS(1),
     [sym_identifier] = ACTIONS(1),
+    [anon_sym_DOLLAR] = ACTIONS(1),
+    [anon_sym_LBRACE] = ACTIONS(1),
+    [anon_sym_RBRACE] = ACTIONS(1),
     [anon_sym_SQUOTE] = ACTIONS(1),
     [anon_sym_DQUOTE] = ACTIONS(1),
     [sym_decimal] = ACTIONS(1),
@@ -625,7 +686,7 @@ static const uint16_t ts_parse_table[LARGE_STATE_COUNT][SYMBOL_COUNT] = {
     [sym__end_of_assignment] = ACTIONS(1),
   },
   [1] = {
-    [sym_document] = STATE(10),
+    [sym_document] = STATE(15),
     [sym_assignment] = STATE(4),
     [aux_sym_document_repeat1] = STATE(4),
     [ts_builtin_sym_end] = ACTIONS(3),
@@ -633,30 +694,32 @@ static const uint16_t ts_parse_table[LARGE_STATE_COUNT][SYMBOL_COUNT] = {
     [sym_identifier] = ACTIONS(7),
   },
   [2] = {
-    [sym__value] = STATE(14),
-    [sym_string] = STATE(14),
-    [sym__literal_string] = STATE(13),
-    [sym__string] = STATE(13),
-    [sym_number] = STATE(14),
-    [sym_integer] = STATE(11),
-    [anon_sym_SQUOTE] = ACTIONS(9),
-    [anon_sym_DQUOTE] = ACTIONS(11),
-    [sym_decimal] = ACTIONS(13),
-    [sym_hexadecimal] = ACTIONS(13),
-    [sym_float] = ACTIONS(15),
-    [sym_boolean] = ACTIONS(17),
-    [sym_value] = ACTIONS(17),
-    [sym__end_of_assignment] = ACTIONS(19),
+    [sym_variable] = STATE(19),
+    [sym__value] = STATE(19),
+    [sym_string] = STATE(19),
+    [sym__literal_string] = STATE(20),
+    [sym__string] = STATE(20),
+    [sym_number] = STATE(19),
+    [sym_integer] = STATE(18),
+    [anon_sym_DOLLAR] = ACTIONS(9),
+    [anon_sym_SQUOTE] = ACTIONS(11),
+    [anon_sym_DQUOTE] = ACTIONS(13),
+    [sym_decimal] = ACTIONS(15),
+    [sym_hexadecimal] = ACTIONS(15),
+    [sym_float] = ACTIONS(17),
+    [sym_boolean] = ACTIONS(19),
+    [sym_value] = ACTIONS(19),
+    [sym__end_of_assignment] = ACTIONS(21),
   },
 };
 
 static const uint16_t ts_small_parse_table[] = {
   [0] = 4,
-    ACTIONS(21), 1,
-      ts_builtin_sym_end,
     ACTIONS(23), 1,
+      ts_builtin_sym_end,
+    ACTIONS(25), 1,
       sym_comment,
-    ACTIONS(26), 1,
+    ACTIONS(28), 1,
       sym_identifier,
     STATE(3), 2,
       sym_assignment,
@@ -664,90 +727,163 @@ static const uint16_t ts_small_parse_table[] = {
   [14] = 4,
     ACTIONS(7), 1,
       sym_identifier,
-    ACTIONS(29), 1,
-      ts_builtin_sym_end,
     ACTIONS(31), 1,
+      ts_builtin_sym_end,
+    ACTIONS(33), 1,
       sym_comment,
     STATE(3), 2,
       sym_assignment,
       aux_sym_document_repeat1,
-  [28] = 1,
-    ACTIONS(33), 3,
-      ts_builtin_sym_end,
-      sym_comment,
-      sym_identifier,
-  [34] = 1,
-    ACTIONS(35), 3,
-      ts_builtin_sym_end,
-      sym_comment,
-      sym_identifier,
-  [40] = 2,
+  [28] = 4,
+    ACTIONS(35), 1,
+      anon_sym_DOLLAR,
     ACTIONS(37), 1,
-      anon_sym_SQUOTE,
+      anon_sym_DQUOTE,
     ACTIONS(39), 1,
-      aux_sym__literal_string_token1,
-  [47] = 2,
+      aux_sym__string_token1,
+    STATE(6), 2,
+      sym_variable,
+      aux_sym__string_repeat1,
+  [42] = 4,
+    ACTIONS(35), 1,
+      anon_sym_DOLLAR,
     ACTIONS(41), 1,
       anon_sym_DQUOTE,
     ACTIONS(43), 1,
       aux_sym__string_token1,
-  [54] = 1,
+    STATE(7), 2,
+      sym_variable,
+      aux_sym__string_repeat1,
+  [56] = 4,
     ACTIONS(45), 1,
-      anon_sym_EQ,
-  [58] = 1,
-    ACTIONS(47), 1,
-      ts_builtin_sym_end,
-  [62] = 1,
-    ACTIONS(49), 1,
-      sym__end_of_assignment,
-  [66] = 1,
-    ACTIONS(51), 1,
-      sym__end_of_assignment,
+      anon_sym_DOLLAR,
+    ACTIONS(48), 1,
+      anon_sym_DQUOTE,
+    ACTIONS(50), 1,
+      aux_sym__string_token1,
+    STATE(7), 2,
+      sym_variable,
+      aux_sym__string_repeat1,
   [70] = 1,
-    ACTIONS(53), 1,
-      sym__end_of_assignment,
-  [74] = 1,
-    ACTIONS(55), 1,
-      sym__end_of_assignment,
-  [78] = 1,
-    ACTIONS(57), 1,
+    ACTIONS(53), 3,
+      ts_builtin_sym_end,
+      sym_comment,
+      sym_identifier,
+  [76] = 1,
+    ACTIONS(55), 3,
+      ts_builtin_sym_end,
+      sym_comment,
+      sym_identifier,
+  [82] = 2,
+    ACTIONS(59), 1,
+      aux_sym__string_token1,
+    ACTIONS(57), 2,
+      anon_sym_DOLLAR,
+      anon_sym_DQUOTE,
+  [90] = 2,
+    ACTIONS(63), 1,
+      aux_sym__string_token1,
+    ACTIONS(61), 2,
+      anon_sym_DOLLAR,
+      anon_sym_DQUOTE,
+  [98] = 2,
+    ACTIONS(65), 1,
       anon_sym_SQUOTE,
-  [82] = 1,
+    ACTIONS(67), 1,
+      aux_sym__literal_string_token1,
+  [105] = 2,
+    ACTIONS(69), 1,
+      sym_identifier,
+    ACTIONS(71), 1,
+      anon_sym_LBRACE,
+  [112] = 2,
+    ACTIONS(73), 1,
+      sym_identifier,
+    ACTIONS(75), 1,
+      anon_sym_LBRACE,
+  [119] = 1,
+    ACTIONS(77), 1,
+      ts_builtin_sym_end,
+  [123] = 1,
+    ACTIONS(79), 1,
+      anon_sym_EQ,
+  [127] = 1,
+    ACTIONS(81), 1,
+      sym__end_of_assignment,
+  [131] = 1,
+    ACTIONS(83), 1,
+      sym__end_of_assignment,
+  [135] = 1,
+    ACTIONS(85), 1,
+      sym__end_of_assignment,
+  [139] = 1,
+    ACTIONS(87), 1,
+      sym__end_of_assignment,
+  [143] = 1,
     ACTIONS(59), 1,
       sym__end_of_assignment,
-  [86] = 1,
-    ACTIONS(61), 1,
-      anon_sym_DQUOTE,
-  [90] = 1,
+  [147] = 1,
+    ACTIONS(89), 1,
+      sym__end_of_assignment,
+  [151] = 1,
+    ACTIONS(91), 1,
+      anon_sym_RBRACE,
+  [155] = 1,
+    ACTIONS(93), 1,
+      sym__end_of_assignment,
+  [159] = 1,
+    ACTIONS(95), 1,
+      sym__end_of_assignment,
+  [163] = 1,
+    ACTIONS(97), 1,
+      anon_sym_SQUOTE,
+  [167] = 1,
     ACTIONS(63), 1,
       sym__end_of_assignment,
-  [94] = 1,
-    ACTIONS(65), 1,
-      sym__end_of_assignment,
-  [98] = 1,
-    ACTIONS(67), 1,
+  [171] = 1,
+    ACTIONS(99), 1,
       sym__end_of_assignment,
+  [175] = 1,
+    ACTIONS(101), 1,
+      sym_identifier,
+  [179] = 1,
+    ACTIONS(103), 1,
+      anon_sym_RBRACE,
+  [183] = 1,
+    ACTIONS(105), 1,
+      sym_identifier,
 };
 
 static const uint32_t ts_small_parse_table_map[] = {
   [SMALL_STATE(3)] = 0,
   [SMALL_STATE(4)] = 14,
   [SMALL_STATE(5)] = 28,
-  [SMALL_STATE(6)] = 34,
-  [SMALL_STATE(7)] = 40,
-  [SMALL_STATE(8)] = 47,
-  [SMALL_STATE(9)] = 54,
-  [SMALL_STATE(10)] = 58,
-  [SMALL_STATE(11)] = 62,
-  [SMALL_STATE(12)] = 66,
-  [SMALL_STATE(13)] = 70,
-  [SMALL_STATE(14)] = 74,
-  [SMALL_STATE(15)] = 78,
-  [SMALL_STATE(16)] = 82,
-  [SMALL_STATE(17)] = 86,
-  [SMALL_STATE(18)] = 90,
-  [SMALL_STATE(19)] = 94,
-  [SMALL_STATE(20)] = 98,
+  [SMALL_STATE(6)] = 42,
+  [SMALL_STATE(7)] = 56,
+  [SMALL_STATE(8)] = 70,
+  [SMALL_STATE(9)] = 76,
+  [SMALL_STATE(10)] = 82,
+  [SMALL_STATE(11)] = 90,
+  [SMALL_STATE(12)] = 98,
+  [SMALL_STATE(13)] = 105,
+  [SMALL_STATE(14)] = 112,
+  [SMALL_STATE(15)] = 119,
+  [SMALL_STATE(16)] = 123,
+  [SMALL_STATE(17)] = 127,
+  [SMALL_STATE(18)] = 131,
+  [SMALL_STATE(19)] = 135,
+  [SMALL_STATE(20)] = 139,
+  [SMALL_STATE(21)] = 143,
+  [SMALL_STATE(22)] = 147,
+  [SMALL_STATE(23)] = 151,
+  [SMALL_STATE(24)] = 155,
+  [SMALL_STATE(25)] = 159,
+  [SMALL_STATE(26)] = 163,
+  [SMALL_STATE(27)] = 167,
+  [SMALL_STATE(28)] = 171,
+  [SMALL_STATE(29)] = 175,
+  [SMALL_STATE(30)] = 179,
+  [SMALL_STATE(31)] = 183,
 };
 
 static const TSParseActionEntry ts_parse_actions[] = {
@@ -755,36 +891,54 @@ static const TSParseActionEntry ts_parse_actions[] = {
   [1] = {.entry = {.count = 1, .reusable = false}}, RECOVER(),
   [3] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_document, 0, 0, 0),
   [5] = {.entry = {.count = 1, .reusable = true}}, SHIFT(4),
-  [7] = {.entry = {.count = 1, .reusable = true}}, SHIFT(9),
-  [9] = {.entry = {.count = 1, .reusable = true}}, SHIFT(7),
-  [11] = {.entry = {.count = 1, .reusable = true}}, SHIFT(8),
-  [13] = {.entry = {.count = 1, .reusable = false}}, SHIFT(12),
-  [15] = {.entry = {.count = 1, .reusable = false}}, SHIFT(11),
-  [17] = {.entry = {.count = 1, .reusable = false}}, SHIFT(14),
-  [19] = {.entry = {.count = 1, .reusable = true}}, SHIFT(5),
-  [21] = {.entry = {.count = 1, .reusable = true}}, REDUCE(aux_sym_document_repeat1, 2, 0, 0),
-  [23] = {.entry = {.count = 2, .reusable = true}}, REDUCE(aux_sym_document_repeat1, 2, 0, 0), SHIFT_REPEAT(3),
-  [26] = {.entry = {.count = 2, .reusable = true}}, REDUCE(aux_sym_document_repeat1, 2, 0, 0), SHIFT_REPEAT(9),
-  [29] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_document, 1, 0, 0),
-  [31] = {.entry = {.count = 1, .reusable = true}}, SHIFT(3),
-  [33] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_assignment, 3, 0, 1),
-  [35] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_assignment, 4, 0, 2),
-  [37] = {.entry = {.count = 1, .reusable = false}}, SHIFT(18),
-  [39] = {.entry = {.count = 1, .reusable = true}}, SHIFT(15),
-  [41] = {.entry = {.count = 1, .reusable = false}}, SHIFT(16),
-  [43] = {.entry = {.count = 1, .reusable = true}}, SHIFT(17),
-  [45] = {.entry = {.count = 1, .reusable = true}}, SHIFT(2),
-  [47] = {.entry = {.count = 1, .reusable = true}},  ACCEPT_INPUT(),
-  [49] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_number, 1, 0, 0),
-  [51] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_integer, 1, 0, 0),
-  [53] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_string, 1, 0, 0),
-  [55] = {.entry = {.count = 1, .reusable = true}}, SHIFT(6),
-  [57] = {.entry = {.count = 1, .reusable = true}}, SHIFT(19),
-  [59] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym__string, 2, 0, 0),
-  [61] = {.entry = {.count = 1, .reusable = true}}, SHIFT(20),
-  [63] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym__literal_string, 2, 0, 0),
-  [65] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym__literal_string, 3, 0, 0),
-  [67] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym__string, 3, 0, 0),
+  [7] = {.entry = {.count = 1, .reusable = true}}, SHIFT(16),
+  [9] = {.entry = {.count = 1, .reusable = true}}, SHIFT(13),
+  [11] = {.entry = {.count = 1, .reusable = true}}, SHIFT(12),
+  [13] = {.entry = {.count = 1, .reusable = true}}, SHIFT(5),
+  [15] = {.entry = {.count = 1, .reusable = false}}, SHIFT(17),
+  [17] = {.entry = {.count = 1, .reusable = false}}, SHIFT(18),
+  [19] = {.entry = {.count = 1, .reusable = false}}, SHIFT(19),
+  [21] = {.entry = {.count = 1, .reusable = true}}, SHIFT(8),
+  [23] = {.entry = {.count = 1, .reusable = true}}, REDUCE(aux_sym_document_repeat1, 2, 0, 0),
+  [25] = {.entry = {.count = 2, .reusable = true}}, REDUCE(aux_sym_document_repeat1, 2, 0, 0), SHIFT_REPEAT(3),
+  [28] = {.entry = {.count = 2, .reusable = true}}, REDUCE(aux_sym_document_repeat1, 2, 0, 0), SHIFT_REPEAT(16),
+  [31] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_document, 1, 0, 0),
+  [33] = {.entry = {.count = 1, .reusable = true}}, SHIFT(3),
+  [35] = {.entry = {.count = 1, .reusable = false}}, SHIFT(14),
+  [37] = {.entry = {.count = 1, .reusable = false}}, SHIFT(25),
+  [39] = {.entry = {.count = 1, .reusable = true}}, SHIFT(6),
+  [41] = {.entry = {.count = 1, .reusable = false}}, SHIFT(28),
+  [43] = {.entry = {.count = 1, .reusable = true}}, SHIFT(7),
+  [45] = {.entry = {.count = 2, .reusable = false}}, REDUCE(aux_sym__string_repeat1, 2, 0, 0), SHIFT_REPEAT(14),
+  [48] = {.entry = {.count = 1, .reusable = false}}, REDUCE(aux_sym__string_repeat1, 2, 0, 0),
+  [50] = {.entry = {.count = 2, .reusable = true}}, REDUCE(aux_sym__string_repeat1, 2, 0, 0), SHIFT_REPEAT(7),
+  [53] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_assignment, 3, 0, 1),
+  [55] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_assignment, 4, 0, 2),
+  [57] = {.entry = {.count = 1, .reusable = false}}, REDUCE(sym_variable, 2, 0, 0),
+  [59] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_variable, 2, 0, 0),
+  [61] = {.entry = {.count = 1, .reusable = false}}, REDUCE(sym_variable, 4, 0, 0),
+  [63] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_variable, 4, 0, 0),
+  [65] = {.entry = {.count = 1, .reusable = false}}, SHIFT(22),
+  [67] = {.entry = {.count = 1, .reusable = true}}, SHIFT(26),
+  [69] = {.entry = {.count = 1, .reusable = true}}, SHIFT(21),
+  [71] = {.entry = {.count = 1, .reusable = true}}, SHIFT(29),
+  [73] = {.entry = {.count = 1, .reusable = true}}, SHIFT(10),
+  [75] = {.entry = {.count = 1, .reusable = true}}, SHIFT(31),
+  [77] = {.entry = {.count = 1, .reusable = true}},  ACCEPT_INPUT(),
+  [79] = {.entry = {.count = 1, .reusable = true}}, SHIFT(2),
+  [81] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_integer, 1, 0, 0),
+  [83] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_number, 1, 0, 0),
+  [85] = {.entry = {.count = 1, .reusable = true}}, SHIFT(9),
+  [87] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_string, 1, 0, 0),
+  [89] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym__literal_string, 2, 0, 0),
+  [91] = {.entry = {.count = 1, .reusable = true}}, SHIFT(27),
+  [93] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym__literal_string, 3, 0, 0),
+  [95] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym__string, 2, 0, 0),
+  [97] = {.entry = {.count = 1, .reusable = true}}, SHIFT(24),
+  [99] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym__string, 3, 0, 0),
+  [101] = {.entry = {.count = 1, .reusable = true}}, SHIFT(23),
+  [103] = {.entry = {.count = 1, .reusable = true}}, SHIFT(11),
+  [105] = {.entry = {.count = 1, .reusable = true}}, SHIFT(30),
 };
 
 enum ts_external_scanner_symbol_identifiers {
diff --git a/test/corpus/variables.txt b/test/corpus/variables.txt
new file mode 100644
index 0000000..9aa9511
--- /dev/null
+++ b/test/corpus/variables.txt
@@ -0,0 +1,44 @@
+================================================================================
+Variables
+================================================================================
+
+BASIC = $VARIABLE
+GROUP = ${VARIABLE}
+
+--------------------------------------------------------------------------------
+
+(document
+ (assignment
+  key: (identifier)
+  value: (variable
+      (identifier)))
+ (assignment
+  key: (identifier)
+  value: (variable
+      (identifier))))
+
+================================================================================
+Variables in strings
+================================================================================
+
+UNDERSCORE = "$VARIABLE_WITH_UNDERSCORE"
+MULTIPLE = "variable is: ${VARIABLE}, and $ANOTHER !!!"
+
+--------------------------------------------------------------------------------
+
+(document
+ (assignment
+  key: (identifier)
+  value: (string
+      (variable
+       (identifier))))
+ (assignment
+  key: (identifier)
+  value: (string
+    (string_content)
+    (variable
+     (identifier))
+    (string_content)
+    (variable
+     (identifier))
+    (string_content))))