diff --git a/examples/siri_exm_SX/VDV736_exm/SX_1022_main_message.xml b/examples/siri_exm_SX/VDV736_exm/SX_1022_main_message.xml
index aff8f2eb..64184c0d 100644
--- a/examples/siri_exm_SX/VDV736_exm/SX_1022_main_message.xml
+++ b/examples/siri_exm_SX/VDV736_exm/SX_1022_main_message.xml
@@ -31,6 +31,7 @@
 					<ReasonName xml:lang="EN">Fire brigade action at Haldenstrasse</ReasonName>
 					<Priority>3</Priority>
 					<ScopeType>route</ScopeType>
+					<Keywords>CategoryRef:1 Meldungskategorie:Umleitung Feuerwehreinsatz Haldenstrasse</Keywords>
 					<Language>DE</Language>
 					<Summary xml:lang="DE">Unterbruch zwischen Luzernerhof und Verkehrshaus</Summary>
 					<Summary xml:lang="EN">Line disruption between Luzernerhof and Verkehrshaus</Summary>
diff --git a/xsd/siri_model/siri_situation.xsd b/xsd/siri_model/siri_situation.xsd
index 1878f96d..d7ae32c6 100644
--- a/xsd/siri_model/siri_situation.xsd
+++ b/xsd/siri_model/siri_situation.xsd
@@ -713,7 +713,7 @@ Rail transport, Roads and road transport
 			</xsd:element>
 			<xsd:element name="Keywords" type="xsd:NMTOKENS" minOccurs="0">
 				<xsd:annotation>
-					<xsd:documentation>Arbitrary application specific classifiers.</xsd:documentation>
+					<xsd:documentation>A whitespace-separated list of arbitrary application specific classifiers, tags or message categories for filtering or display, for example as icons on a situation map. Can be overwritten in an individual action.</xsd:documentation>
 				</xsd:annotation>
 			</xsd:element>
 			<xsd:element name="SecondaryReasons" minOccurs="0">
diff --git a/xsd/siri_model/siri_situationActions.xsd b/xsd/siri_model/siri_situationActions.xsd
index 7b540937..77715ddf 100644
--- a/xsd/siri_model/siri_situationActions.xsd
+++ b/xsd/siri_model/siri_situationActions.xsd
@@ -144,6 +144,11 @@ Rail transport, Roads and road transport
 							<xsd:documentation>Description of action.</xsd:documentation>
 						</xsd:annotation>
 					</xsd:element>
+					<xsd:element name="Keywords" type="xsd:NMTOKENS" minOccurs="0">
+						<xsd:annotation>
+							<xsd:documentation>A whitespace-separated list of arbitrary application specific classifiers, tags or message categories for filtering or display, for example as icons on a situation map. Overwrites Keywords on PtSituationElement level (in the context of this action).</xsd:documentation>
+						</xsd:annotation>
+					</xsd:element>
 					<xsd:element name="ActionData" type="ActionDataStructure" minOccurs="0" maxOccurs="unbounded">
 						<xsd:annotation>
 							<xsd:documentation>Data associated with action.</xsd:documentation>
@@ -575,7 +580,7 @@ Rail transport, Roads and road transport
 					</xsd:element>
 					<xsd:element name="Version" type="SituationVersion" minOccurs="0">
 						<xsd:annotation>
-							<xsd:documentation>The monotonically inscresing version of the passenger information instance. If absent, is the same version as the enclosing Situation</xsd:documentation>
+							<xsd:documentation>The monotonically increasing version of the passenger information instance. If absent, is the same version as the enclosing Situation</xsd:documentation>
 						</xsd:annotation>
 					</xsd:element>
 					<xsd:element name="SourceRef" type="ParticipantRefStructure" minOccurs="0">