GIVEN a Wildfly 10.1.0.Final subsystem datasources configuration as
	<subsystem xmlns="urn:jboss:domain:datasources:4.0">
		<datasources>
			<xa-datasource jndi-name="java:/datasources/SOURCE" pool-name="SOURCE" enabled="${source.db.enabled:false}">
				<xa-datasource-property name="URL">
					${source.db.url:undefined}
				</xa-datasource-property>
				<driver>OracleJDBCDriver</driver>
				<xa-pool>
					<min-pool-size>0</min-pool-size>
					<max-pool-size>10</max-pool-size>
					<is-same-rm-override>false</is-same-rm-override>
					<no-tx-separate-pools>true</no-tx-separate-pools>
				</xa-pool>
				<security>
					<user-name>${source.db.user:user}</user-name>
					<password>${source.db.password:password}</password>
				</security>
				<recovery no-recovery="true"/>
				<validation>
					<valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.oracle.OracleValidConnectionChecker"/>
					<stale-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.oracle.OracleStaleConnectionChecker"/>
					<exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.oracle.OracleExceptionSorter"/>
				</validation>
			</xa-datasource>
		</datasources>
		<drivers>
			<driver name="h2" module="com.h2database.h2">
				<xa-datasource-class>org.h2.jdbcx.JdbcDataSource</xa-datasource-class>
			</driver>
			<driver name="OracleJDBCDriver" module="com.oracle.ojdbc7">
				<xa-datasource-class>oracle.jdbc.xa.client.OracleXADataSource</xa-datasource-class>
			</driver>
		</drivers>
	</subsystem>
AND a /full/path/to/file.properties file fitting a database connection, containing
	source.db.enabled=true
	source.db.url=jdbc:oracle:thin:@sample.de:1521:MY_SID
	source.db.user=USER
	source.db.password=PASSWORD
WHEN the server is started with --properties=/full/path/to/file.properties
THEN the webadmin console shows the xa-datasource SOURCE within the datasources subsytem