Extend supported variables and improve parser errors

Sharp7.Rx/Enums/DbType.cs

@@ -1,12 +1,52 @@
 namespace Sharp7.Rx.Enums;
 
+// see https://support.industry.siemens.com/cs/mdm/109747174?c=88343664523&lc=de-DE
 internal enum DbType
 {
     Bit,
+
+    /// <summary>
+    ///     ASCII string
+    /// </summary>
     String,
+
+    /// <summary>
+    ///     UTF16 string
+    /// </summary>
+    WString,
+
     Byte,
+
+    /// <summary>
+    ///     Int16
+    /// </summary>
+    Int,
+
+    /// <summary>
+    ///     UInt16
+    /// </summary>
+    UInt,
+
+    /// <summary>
+    ///     Int32
+    /// </summary>
+    DInt,
+
+    /// <summary>
+    ///     UInt32
+    /// </summary>
+    UDInt,
+
+    /// <summary>
+    ///     Int64
+    /// </summary>
+    LInt,
+
+    /// <summary>
+    ///     UInt64
+    /// </summary>
+    ULInt,
+
+    Single,
     Double,
-    Integer,
-    DInteger,
-    ULong
 }