001    // Copyright 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry.binding;
016    
017    /**
018     * Constant values related to bindings.
019     * 
020     * @author Howard M. Lewis Ship
021     * @since 4.0
022     */
023    public class BindingConstants
024    {
025        /**
026         * Prefix used when the value should be interpreted as an OGNL expression.
027         */
028    
029        public static final String OGNL_PREFIX = "ognl";
030    
031        /**
032         * Prefix used when the value should be interpeted as a key for a localized message (of the
033         * component's message catalog).
034         */
035        public static final String MESSAGE_PREFIX = "message";
036        
037        /**
038         * Prefix used to ensure that the value is interpreted as a literal
039         * string.
040         * 
041         */
042        
043        public static final String LITERAL_PREFIX = "literal";
044    }