diff --git a/src/main/java/net/fortuna/ical4j/extensions/parameter/Display.java b/src/main/java/net/fortuna/ical4j/extensions/parameter/Display.java
new file mode 100644
index 0000000..ecd8fc1
--- /dev/null
+++ b/src/main/java/net/fortuna/ical4j/extensions/parameter/Display.java
@@ -0,0 +1,97 @@
+package net.fortuna.ical4j.extensions.parameter;
+
+import net.fortuna.ical4j.model.Content;
+import net.fortuna.ical4j.model.Parameter;
+import net.fortuna.ical4j.model.ParameterFactory;
+import net.fortuna.ical4j.model.ParameterFactoryImpl;
+import org.apache.commons.lang3.StringUtils;
+
+/**
+ *
+ * Parameter Name: DISPLAY
+ *
+ * Purpose: To specify different ways in which an image for a calendar
+ * or component can be displayed.
+ *
+ * Format Definition: This property parameter is defined by the
+ * following notation:
+ *
+ * displayparam = "DISPLAY" "=" displayval *("," displayval)
+ *
+ * displayval = ("BADGE" / ; image inline with the title of the
+ * ; event
+ * "GRAPHIC" / ; a full image replacement for the event
+ * ; itself
+ * "FULLSIZE / ; an image that is used to enhance the
+ * ; event
+ * "THUMBNAIL / ; a smaller variant of "FULLSIZE" to be
+ * ; used when space for the image is
+ * ; constrained
+ * x-name / ; Experimental type
+ * iana-token) ; Other IANA registered type
+ * ;
+ * ; Default is BADGE
+ *
+ * Description: This property parameter MAY be specified on "IMAGE"
+ * properties. In the absence of this parameter, the value "BADGE"
+ * MUST be used for the default behavior. The value determines how a
+ * client ought to present an image supplied in iCalendar data to the
+ * user.
+ *
+ * Values for this parameter are registered with IANA as per
+ * Section 8.3. New values can be added to this registry following
+ * the procedure outlined in Section 8.2.1 of [RFC5545].
+ *
+ * Servers and clients MUST handle x-name and iana-token values they
+ * don't recognize by not displaying any image at all.
+ *
+ * Example:
+ *
+ * IMAGE;VALUE=URI;DISPLAY=BADGE,THUMBNAIL,;FMTTYPE=image/png:http://exa
+ * mple.com/images/weather-cloudy.png
+ *
+ */
+public class Display extends Parameter {
+
+ private static final long serialVersionUID = 1L;
+
+ private static final String PARAMETER_NAME = "DISPLAY";
+
+ public enum Value {
+ BADGE, GRAPHIC, FULLSIZE, THUMBNAIL;
+ }
+
+ private final String[] values;
+
+ public Display(String value) {
+ super(PARAMETER_NAME, ParameterFactoryImpl.getInstance());
+ String[] valueStrings = value.split(",");
+ for (String valueString : valueStrings) {
+ try {
+ Value.valueOf(valueString);
+ } catch (IllegalArgumentException iae) {
+ if (!valueString.startsWith(Parameter.EXPERIMENTAL_PREFIX)) {
+ throw iae;
+ }
+ }
+ }
+ this.values = valueStrings;
+ }
+
+ @Override
+ public String getValue() {
+ return StringUtils.join(values, ",");
+ }
+
+ public static class Factory extends Content.Factory implements ParameterFactory {
+ private static final long serialVersionUID = 1L;
+
+ public Factory() {
+ super(PARAMETER_NAME);
+ }
+
+ public Parameter createParameter(final String value) {
+ return new Display(value);
+ }
+ }
+}
diff --git a/src/main/java/net/fortuna/ical4j/extensions/parameter/Email.java b/src/main/java/net/fortuna/ical4j/extensions/parameter/Email.java
index d8c52ed..8891ce7 100644
--- a/src/main/java/net/fortuna/ical4j/extensions/parameter/Email.java
+++ b/src/main/java/net/fortuna/ical4j/extensions/parameter/Email.java
@@ -12,7 +12,7 @@
* From specification:
*
*
- * Parameter Name: EMAIL
+ * Parameter Name: EMAIL
*
* Purpose: To specify an email address that is used to identify or
* contact an organizer or attendee.
diff --git a/src/main/java/net/fortuna/ical4j/extensions/parameter/Feature.java b/src/main/java/net/fortuna/ical4j/extensions/parameter/Feature.java
new file mode 100644
index 0000000..30f7d36
--- /dev/null
+++ b/src/main/java/net/fortuna/ical4j/extensions/parameter/Feature.java
@@ -0,0 +1,89 @@
+package net.fortuna.ical4j.extensions.parameter;
+
+import net.fortuna.ical4j.model.Content;
+import net.fortuna.ical4j.model.Parameter;
+import net.fortuna.ical4j.model.ParameterFactory;
+import net.fortuna.ical4j.model.ParameterFactoryImpl;
+import org.apache.commons.lang3.StringUtils;
+
+/**
+ *
+ * Parameter Name: FEATURE
+ *
+ * Purpose: To specify a feature or features of a conference or
+ * broadcast system.
+ *
+ * Format Definition: This property parameter is defined by the
+ * following notation:
+ *
+ * featureparam = "FEATURE" "=" featuretext *("," featuretext)
+ * featuretext = ("AUDIO" / ; Audio capability
+ * "CHAT" / ; Chat or instant messaging
+ * "FEED" / ; Blog or Atom feed
+ * "MODERATOR" / ; Moderator dial-in code
+ * "PHONE" / ; Phone conference
+ * "SCREEN" / ; Screen sharing
+ * "VIDEO" / ; Video capability
+ * x-name / ; Experimental type
+ * iana-token) ; Other IANA registered type
+ *
+ * Description: This property parameter MAY be specified on the
+ * "CONFERENCE" property. Multiple values can be specified. The
+ * "MODERATOR" value is used to indicate that the property value is
+ * specific to the owner/initiator of the conference and contains a
+ * URI that "activates" the system (e.g., a "moderator" access code
+ * for a phone conference system that is different from the "regular"
+ * access code).
+ *
+ * Example:
+ *
+ * CONFERENCE;VALUE=URI;FEATURE=AUDIO:rtsp://audio.example.com/
+ * event
+ * CONFERENCE;VALUE=URI;FEATURE=AUDIO,VIDEO:http://video-chat.exam
+ * ple.com/;group-id=1234
+ *
+ */
+public class Feature extends Parameter {
+
+ private static final long serialVersionUID = 1L;
+
+ private static final String PARAMETER_NAME = "FEATURE";
+
+ public enum Value {
+ AUDIO, CHAT, FEED, MODERATOR, PHONE, SCREEN, VIDEO;
+ }
+
+ private final String[] values;
+
+ public Feature(String value) {
+ super(PARAMETER_NAME, ParameterFactoryImpl.getInstance());
+ String[] valueStrings = value.split(",");
+ for (String valueString : valueStrings) {
+ try {
+ Value.valueOf(valueString);
+ } catch (IllegalArgumentException iae) {
+ if (!valueString.startsWith(Parameter.EXPERIMENTAL_PREFIX)) {
+ throw iae;
+ }
+ }
+ }
+ this.values = valueStrings;
+ }
+
+ @Override
+ public String getValue() {
+ return StringUtils.join(values, ",");
+ }
+
+ public static class Factory extends Content.Factory implements ParameterFactory {
+ private static final long serialVersionUID = 1L;
+
+ public Factory() {
+ super(PARAMETER_NAME);
+ }
+
+ public Parameter createParameter(final String value) {
+ return new Feature(value);
+ }
+ }
+}
diff --git a/src/main/java/net/fortuna/ical4j/extensions/parameter/Label.java b/src/main/java/net/fortuna/ical4j/extensions/parameter/Label.java
new file mode 100644
index 0000000..d8e32fc
--- /dev/null
+++ b/src/main/java/net/fortuna/ical4j/extensions/parameter/Label.java
@@ -0,0 +1,65 @@
+package net.fortuna.ical4j.extensions.parameter;
+
+import net.fortuna.ical4j.model.Content;
+import net.fortuna.ical4j.model.Parameter;
+import net.fortuna.ical4j.model.ParameterFactory;
+import net.fortuna.ical4j.model.ParameterFactoryImpl;
+
+/**
+ *
+ * Parameter Name: LABEL
+ *
+ * Purpose: To provide a human readable label.
+ *
+ * Format Definition: This property parameter is defined by the
+ * following notation:
+ *
+ * infoparam = "LABEL" "=" param-value
+ *
+ * Description: This property parameter MAY be specified on the
+ * "CONFERENCE" property. It is anticipated that other extensions to
+ * iCalendar will re-use this property parameter on new properties
+ * that they define. As a result, clients SHOULD expect to find this
+ * property parameter present on many different properties. It
+ * provides a human readable label that can be presented to calendar
+ * users to allow them to discriminate between properties which might
+ * be similar, or provide additional information for properties that
+ * are not self-describing.
+ *
+ * Example:
+ *
+ * CONFERENCE;VALUE=URI;FEATURE=VIDEO;
+ * LABEL="Web video chat, access code=76543";
+ * :http://video-chat.example.com/;group-id=1234
+ *
+ */
+public class Label extends Parameter {
+
+ private static final long serialVersionUID = 1L;
+
+ private static final String PARAMETER_NAME = "LABEL";
+
+ private final String value;
+
+ public Label(String value) {
+ super(PARAMETER_NAME, ParameterFactoryImpl.getInstance());
+ this.value = value;
+ }
+
+ @Override
+ public String getValue() {
+ return value;
+ }
+
+ public static class Factory extends Content.Factory implements ParameterFactory {
+ private static final long serialVersionUID = 1L;
+
+ public Factory() {
+ super(PARAMETER_NAME);
+ }
+
+ public Parameter createParameter(final String value) {
+ return new Label(value);
+ }
+ }
+}
diff --git a/src/main/resources/META-INF/services/net.fortuna.ical4j.model.ParameterFactory b/src/main/resources/META-INF/services/net.fortuna.ical4j.model.ParameterFactory
index 821419c..2b43f94 100644
--- a/src/main/resources/META-INF/services/net.fortuna.ical4j.model.ParameterFactory
+++ b/src/main/resources/META-INF/services/net.fortuna.ical4j.model.ParameterFactory
@@ -1,2 +1,5 @@
# calext extensions
net.fortuna.ical4j.extensions.parameter.Email$Factory
+net.fortuna.ical4j.extensions.parameter.Display$Factory
+net.fortuna.ical4j.extensions.parameter.Label$Factory
+net.fortuna.ical4j.extensions.parameter.Feature$Factory
diff --git a/src/test/groovy/net/fortuna/ical4j/extensions/parameter/DisplayTest.groovy b/src/test/groovy/net/fortuna/ical4j/extensions/parameter/DisplayTest.groovy
new file mode 100644
index 0000000..92657af
--- /dev/null
+++ b/src/test/groovy/net/fortuna/ical4j/extensions/parameter/DisplayTest.groovy
@@ -0,0 +1,41 @@
+package net.fortuna.ical4j.extensions.parameter
+
+import net.fortuna.ical4j.data.CalendarBuilder
+import net.fortuna.ical4j.model.Calendar
+import spock.lang.Specification
+
+/**
+ * Created by fortuna on 6/09/15.
+ */
+class DisplayTest extends Specification {
+
+ def 'assert value stored correctly'() {
+ given: 'a display value'
+ String displayValue = 'GRAPHIC,THUMBNAIL'
+
+ when: 'a display object is constructed'
+ Display display = [displayValue]
+
+ then: 'the object value matches the original address'
+ display.value == displayValue
+ }
+
+ def 'assert factory is located correctly'() {
+ given: 'a sample calendar input'
+ String calendarString = '''
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//ABC Corporation//NONSGML My Product//EN
+BEGIN:VTODO
+IMAGE;VALUE=URI;DISPLAY=BADGE,THUMBNAIL,;FMTTYPE=image/png:http://exa
+ mple.com/images/weather-cloudy.png
+END:VCALENDAR
+'''
+
+ when: 'the input is parsed'
+ Calendar calendar = new CalendarBuilder().build(new StringReader(calendarString))
+
+ then: 'a valid calendar is realised'
+ calendar?.components[0].properties[0].getParameter('DISPLAY').value == 'BADGE,THUMBNAIL'
+ }
+}
diff --git a/src/test/groovy/net/fortuna/ical4j/extensions/parameter/FeatureTest.groovy b/src/test/groovy/net/fortuna/ical4j/extensions/parameter/FeatureTest.groovy
new file mode 100644
index 0000000..4a539d8
--- /dev/null
+++ b/src/test/groovy/net/fortuna/ical4j/extensions/parameter/FeatureTest.groovy
@@ -0,0 +1,41 @@
+package net.fortuna.ical4j.extensions.parameter
+
+import net.fortuna.ical4j.data.CalendarBuilder
+import net.fortuna.ical4j.model.Calendar
+import spock.lang.Specification
+
+/**
+ * Created by fortuna on 6/09/15.
+ */
+class FeatureTest extends Specification {
+
+ def 'assert value stored correctly'() {
+ given: 'a feature value'
+ String featureValue = 'GRAPHIC,THUMBNAIL'
+
+ when: 'a feature object is constructed'
+ Feature feature = [featureValue]
+
+ then: 'the object value matches the original value'
+ feature.value == featureValue
+ }
+
+ def 'assert factory is located correctly'() {
+ given: 'a sample calendar input'
+ String calendarString = '''
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//ABC Corporation//NONSGML My Product//EN
+BEGIN:VTODO
+CONFERENCE;VALUE=URI;FEATURE=AUDIO:rtsp://audio.example.com/
+ event
+END:VCALENDAR
+'''
+
+ when: 'the input is parsed'
+ Calendar calendar = new CalendarBuilder().build(new StringReader(calendarString))
+
+ then: 'a valid calendar is realised'
+ calendar?.components[0].properties[0].getParameter('FEATURE').value == 'AUDIO'
+ }
+}
diff --git a/src/test/groovy/net/fortuna/ical4j/extensions/parameter/LabelTest.groovy b/src/test/groovy/net/fortuna/ical4j/extensions/parameter/LabelTest.groovy
new file mode 100644
index 0000000..a16f62f
--- /dev/null
+++ b/src/test/groovy/net/fortuna/ical4j/extensions/parameter/LabelTest.groovy
@@ -0,0 +1,42 @@
+package net.fortuna.ical4j.extensions.parameter
+
+import net.fortuna.ical4j.data.CalendarBuilder
+import net.fortuna.ical4j.model.Calendar
+import spock.lang.Specification
+
+/**
+ * Created by fortuna on 6/09/15.
+ */
+class LabelTest extends Specification {
+
+ def 'assert value stored correctly'() {
+ given: 'a label value'
+ String labelValue = 'Chat room:xmpp:chat-123@conference.example.com'
+
+ when: 'a label object is constructed'
+ Label label = [labelValue]
+
+ then: 'the object value matches the original address'
+ label.value == labelValue
+ }
+
+ def 'assert factory is located correctly'() {
+ given: 'a sample calendar input'
+ String calendarString = '''
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//ABC Corporation//NONSGML My Product//EN
+BEGIN:VTODO
+CONFERENCE;VALUE=URI;FEATURE=VIDEO;
+ LABEL="Web video chat, access code=76543";
+ :http://video-chat.example.com/;group-id=1234END:VTODO
+END:VCALENDAR
+'''
+
+ when: 'the input is parsed'
+ Calendar calendar = new CalendarBuilder().build(new StringReader(calendarString))
+
+ then: 'a valid calendar is realised'
+ calendar?.components[0].properties[0].getParameter('LABEL').value == 'Web video chat, access code=76543'
+ }
+}