diff -r 7e08730da258 -r 4a1864c3e867 java/sql-dk/src/main/java/info/globalcode/sql/dk/configuration/CommandArgument.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/java/sql-dk/src/main/java/info/globalcode/sql/dk/configuration/CommandArgument.java	Mon Mar 04 20:15:24 2019 +0100
@@ -0,0 +1,82 @@
+/**
+ * SQL-DK
+ * Copyright © 2015 František Kučera (frantovo.cz)
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+package info.globalcode.sql.dk.configuration;
+
+import javax.xml.bind.annotation.XmlAttribute;
+import javax.xml.bind.annotation.XmlEnum;
+import javax.xml.bind.annotation.XmlEnumValue;
+import javax.xml.bind.annotation.XmlValue;
+
+/**
+ *
+ * @author Ing. František Kučera (frantovo.cz)
+ */
+public class CommandArgument {
+
+	private String value;
+	private TYPE type;
+
+	@XmlEnum
+	public static enum TYPE {
+
+		/**
+		 * value = literal (text) argument
+		 */
+		@XmlEnumValue("literal")
+		LITERAL,
+		/**
+		 * value will be substituted by hostname or IP address of the DB server
+		 */
+		@XmlEnumValue("host")
+		HOST,
+		/**
+		 * value will be substituted by the port of the DB server
+		 */
+		@XmlEnumValue("port")
+		PORT,
+		/**
+		 * value will be substituted by environmental variable of given name
+		 */
+		@XmlEnumValue("env")
+		ENVIRONMENT_VARIABLE,
+		/**
+		 * value will be substituted by database property of given name
+		 */
+		@XmlEnumValue("dbProperty")
+		DB_PROPERTY;
+	}
+
+	@XmlValue
+	public String getValue() {
+		return value;
+	}
+
+	public void setValue(String value) {
+		this.value = value;
+	}
+
+	@XmlAttribute(name = "type")
+	public TYPE getType() {
+		return type;
+	}
+
+	public void setType(TYPE type) {
+		this.type = type;
+	}
+
+}