diff -r 000000000000 -r fb9019fb1bf7 src/net/fortuna/ical4j/model/property/Categories.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/net/fortuna/ical4j/model/property/Categories.java	Tue Feb 10 18:12:00 2015 +0100
@@ -0,0 +1,176 @@
+/**
+ * Copyright (c) 2012, Ben Fortuna
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *  o Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ *  o Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ *  o Neither the name of Ben Fortuna nor the names of any other contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package net.fortuna.ical4j.model.property;
+
+import net.fortuna.ical4j.model.TextList;
+import net.fortuna.ical4j.model.Parameter;
+import net.fortuna.ical4j.model.ParameterList;
+import net.fortuna.ical4j.model.Property;
+import net.fortuna.ical4j.model.PropertyFactoryImpl;
+import net.fortuna.ical4j.model.ValidationException;
+import net.fortuna.ical4j.util.ParameterValidator;
+
+/**
+ * $Id$
+ * 
+ * Created: [Apr 6, 2004]
+ *
+ * Defines a CATEGORIES iCalendar component property.
+ * <pre>
+ *     4.8.1.2 Categories
+ *     
+ *        Property Name: CATEGORIES
+ *     
+ *        Purpose: This property defines the categories for a calendar
+ *        component.
+ *     
+ *        Value Type: TEXT
+ *     
+ *        Property Parameters: Non-standard and language property parameters
+ *        can be specified on this property.
+ *     
+ *        Conformance: The property can be specified within "VEVENT", "VTODO"
+ *        or "VJOURNAL" calendar components.
+ *     
+ *        Description: This property is used to specify categories or subtypes
+ *        of the calendar component. The categories are useful in searching for
+ *        a calendar component of a particular type and category. Within the
+ *        "VEVENT", "VTODO" or "VJOURNAL" calendar components, more than one
+ *        category can be specified as a list of categories separated by the
+ *        COMMA character (US-ASCII decimal 44).
+ *     
+ *        Format Definition: The property is defined by the following notation:
+ *     
+ *          categories = "CATEGORIES" catparam ":" text *("," text)
+ *                       CRLF
+ *     
+ *          catparam   = *(
+ *     
+ *                     ; the following is optional,
+ *                     ; but MUST NOT occur more than once
+ *     
+ *                     (";" languageparam ) /
+ *     
+ *                     ; the following is optional,
+ *                     ; and MAY occur more than once
+ *     
+ *                     (";" xparam)
+ *     
+ *                     )
+ * </pre>
+ * @author benf
+ */
+public class Categories extends Property {
+
+    private static final long serialVersionUID = -7769987073466681634L;
+
+    private TextList categories;
+
+    /**
+     * Default constructor.
+     */
+    public Categories() {
+        super(CATEGORIES, PropertyFactoryImpl.getInstance());
+        categories = new TextList();
+    }
+
+    /**
+     * @param aValue a value string for this component
+     */
+    public Categories(final String aValue) {
+        super(CATEGORIES, PropertyFactoryImpl.getInstance());
+        setValue(aValue);
+    }
+
+    /**
+     * @param aList a list of parameters for this component
+     * @param aValue a value string for this component
+     */
+    public Categories(final ParameterList aList, final String aValue) {
+        super(CATEGORIES, aList, PropertyFactoryImpl.getInstance());
+        setValue(aValue);
+    }
+
+    /**
+     * @param cList a list of categories
+     */
+    public Categories(final TextList cList) {
+        super(CATEGORIES, PropertyFactoryImpl.getInstance());
+        categories = cList;
+    }
+
+    /**
+     * @param aList a list of parameters for this component
+     * @param cList a list of categories
+     */
+    public Categories(final ParameterList aList, final TextList cList) {
+        super(CATEGORIES, aList, PropertyFactoryImpl.getInstance());
+        categories = cList;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public final void setValue(final String aValue) {
+        categories = new TextList(aValue);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public final void validate() throws ValidationException {
+
+        /*
+         * ; the following is optional, ; but MUST NOT occur more than once (";" languageparam ) /
+         */
+        ParameterValidator.getInstance().assertOneOrLess(Parameter.LANGUAGE,
+                getParameters());
+
+        /*
+         * ; the following is optional, ; and MAY occur more than once (";" xparam)
+         */
+    }
+
+    /**
+     * @return Returns the categories.
+     */
+    public final TextList getCategories() {
+        return categories;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public final String getValue() {
+        return getCategories().toString();
+    }
+}