diff --git a/src/ast_commands.hpp b/src/ast_commands.hpp
index 5caeb2e..90af8ea 100644
--- a/src/ast_commands.hpp
+++ b/src/ast_commands.hpp
@@ -17,9 +17,12 @@
 using x3::alnum;
 using x3::alpha;
 using x3::char_;
+using x3::double_;
 using x3::expect;
+using x3::int_;
 using x3::lexeme;
 using x3::lit;
+using x3::uint_;
 
 struct parser_context_tag;
 
@@ -40,10 +43,24 @@
     path_ m_path;
 };
 
+struct enum_ {
+    enum_();
+    enum_(const std::string& value);
+    bool operator==(const enum_& b) const;
+    std::string m_value;
+};
+
+using leaf_data_ = boost::variant<enum_,
+                                  double,
+                                  bool,
+                                  int32_t,
+                                  uint32_t,
+                                  std::string>;
+
 struct set_ : x3::position_tagged {
     bool operator==(const set_& b) const;
     path_ m_path;
-    std::string m_data;
+    leaf_data_ m_data;
 };
 
 using command_ = boost::variant<cd_, create_, delete_, set_>;
@@ -51,4 +68,5 @@
 BOOST_FUSION_ADAPT_STRUCT(cd_, m_path)
 BOOST_FUSION_ADAPT_STRUCT(create_, m_path)
 BOOST_FUSION_ADAPT_STRUCT(delete_, m_path)
+BOOST_FUSION_ADAPT_STRUCT(enum_, m_value)
 BOOST_FUSION_ADAPT_STRUCT(set_, m_path, m_data)