package com.idega.block.dataquery.data.sql;
/**
* <p>Title: idegaWeb</p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2003</p>
* <p>Company: idega Software</p>
* @author <a href="thomas@idega.is">Thomas Hilbig</a>
* @version 1.0
* Created on Oct 8, 2003
*/
public interface Expression {
public String toSQLString();
public boolean isValid();
}