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diff --git a/Map/Business/WmapParser/Syntax.swift b/Map/Business/WmapParser/Syntax.swift
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+// Copyright (C) 2024 Rubén Beltrán del Río
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see https://map.tranquil.systems.
+extension Wmap {
+  struct SyntaxElement {
+    let type: SyntaxType
+    let range: SourceRange
+    let value: String
+  }
+
+  enum SyntaxType {
+    case keyword  // [Note], [Group], etc.
+    case vertexLabel  // vertex names
+    case number  // coordinates, values
+    case symbol  // ->, --, +, -
+    case shape  // [square], [circle]
+    case text  // note text
+    case punctuation  // (, ), [, ], ,
+    case stageNumber  // i, ii, iii, iv
+  }
+}