+/**
+ * Offers an interface to a subset of the Z39.50 extended services as well as a
+ * few privately defined ones. E.g, Z59.50 ILL, record update, database drop,
+ * create, commit.
+ *
+ * @see <a href="http://www.indexdata.com/yaz/doc/zoom.extendedservices.html">ZOOM Extended Services</a>
+ *
+ * @author jakub
+ */