1   /*
2    *  PropertyReader.java
3    *
4    *  Copyright (c) 1998-2001, The University of Sheffield.
5    *
6    *  This file is part of GATE (see http://gate.ac.uk/), and is free
7    *  software, licenced under the GNU Library General Public License,
8    *  Version 2, June 1991 (in the distribution as file licence.html,
9    *  and also available at http://gate.ac.uk/gate/licence.html).
10   *
11   *  Rosen Marinov, 19/Apr/2002
12   *
13   */
14  
15  package gate.creole.ir;
16  
17  import gate.Document;
18  import java.io.Serializable;
19  
20  
21  public interface PropertyReader extends Serializable{
22  
23    static final long serialVersionUID = 3632609241787241616L;
24  
25    /** @return String value of the requested field. */
26    public String getPropertyValue(Document doc);
27  
28  }