diff --git a/CHANGES.md b/CHANGES.md
index 0ef5658d..7a83ee33 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,11 @@
 # Changelog for BROStar API
 
+## 0.51 (unreleased)
+
+
+- Nothing changed yet.
+
+
 ## 0.50 (2024-10-18)
 
 
@@ -8,6 +14,14 @@
 - Minor bugfixes.
 
 
+## 0.50 (2024-10-18)
+
+
+- Added all GMW-Event templates.
+- Improved GLD and GMN templates.
+- Minor bugfixes.
+
+
 ## 0.49 (2024-09-24)
 
 
diff --git a/api/bro_upload/templates/delete_GLD_Addition.html b/api/bro_upload/templates/delete_GLD_Addition.html
index ac0023a6..2438ea57 100644
--- a/api/bro_upload/templates/delete_GLD_Addition.html
+++ b/api/bro_upload/templates/delete_GLD_Addition.html
@@ -1,74 +1,82 @@
 <deleteRequest xmlns="http://www.broservices.nl/xsd/isgld/1.0"
-    xmlns:wml2="http://www.opengis.net/waterml/2.0"
-    xmlns:gmd="http://www.isotc211.org/2005/gmd"
-    xmlns:gco="http://www.isotc211.org/2005/gco"
-    xmlns:om="http://www.opengis.net/om/2.0"
-    xmlns:swe="http://www.opengis.net/swe/2.0"
-    xmlns:brocom="http://www.broservices.nl/xsd/brocommon/3.0"
-    xmlns:gldcom="http://www.broservices.nl/xsd/gldcommon/1.0"
-    xmlns:gml="http://www.opengis.net/gml/3.2"
-    xmlns:xlink="http://www.w3.org/1999/xlink"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:schemaLocation="http://www.broservices.nl/xsd/isgld/1.0 https://schema.broservices.nl/xsd/isgld/1.0/isgld-messages.xsd">
-    <brocom:requestReference>{{ metadata.requestReference }}</brocom:requestReference>
-    <brocom:deliveryAccountableParty>{{ metadata.deliveryAccountableParty }}</brocom:deliveryAccountableParty>
-    <brocom:broId>{{ metadata.broId }}</brocom:broId>
-    <brocom:qualityRegime>{{ metadata.qualityRegime }}</brocom:qualityRegime>
-    <correctionReason codeSpace="urn:bro:gmn:CorrectionReason">{{ metadata.correctionReason }}</correctionReason>
-    <sourceDocument>
-      <GLD_Addition gml:id="id_0001">
-        <observation>
-          <om:OM_Observation gml:id="{{ sourcedocs_data.observationId }}">
-            <om:type xlink:href="http://www.opengis.net/def/observationType/waterml/2.0/MeasurementTimeseriesTVPObservation"/>
-            <om:metadata>
-              <wml2:ObservationMetadata>
-                <gmd:contact>
-                  <gmd:CI_ResponsibleParty>
-                    <gmd:organisationName>
-                      <gco:CharacterString/>
-                    </gmd:organisationName>
-                    <gmd:role>
-                      <gmd:CI_RoleCode codeList="urn:ISO:19115:CI_RoleCode" codeListValue="principalInvestigator">principalInvestigator</gmd:CI_RoleCode>
-                    </gmd:role>
-                  </gmd:CI_ResponsibleParty>
-                </gmd:contact>
-                <gmd:dateStamp>
-                  <gco:Date>{{ sourcedocs_data.date }}</gco:Date>
-                </gmd:dateStamp>
-                <gmd:identificationInfo gco:nilReason="unknown"/>
-                <wml2:status xlink:href="urn:bro:gld:StatusCode:voorlopig"/>
-                <wml2:parameter>
-                  <om:NamedValue>
-                    <om:name xlink:href="urn:bro:gld:ObservationMetadata:principalInvestigator"/>
-                    <om:value xsi:type="gldcom:OrganizationType">
-                      <gldcom:chamberOfCommerceNumber>{{ sourcedocs_data.investigatorKvk }}</gldcom:chamberOfCommerceNumber>
-                    </om:value>
-                  </om:NamedValue>
-                </wml2:parameter>
-                <wml2:parameter>
-                  <om:NamedValue>
-                    <om:name xlink:href="urn:bro:gld:ObservationMetadata:observationType"/>
-                    <om:value xsi:type="gml:CodeWithAuthorityType" codeSpace="urn:bro:gld:ObservationType">{{ sourcedocs_data.observationType }}</om:value>
-                  </om:NamedValue>
-                </wml2:parameter>
-              </wml2:ObservationMetadata>
-            </om:metadata>
-            <om:phenomenonTime>
-              <gml:TimePeriod gml:id="id_0005">
-                <gml:beginPosition>{{ sourcedocs_data.beginPosition }}</gml:beginPosition>
-                <gml:endPosition>{{ sourcedocs_data.endPosition }}</gml:endPosition>
-              </gml:TimePeriod>
-            </om:phenomenonTime>
-            <om:resultTime>
-              <gml:TimeInstant gml:id="id_0006">
-                <gml:timePosition>{{ sourcedocs_data.resultTime }}</gml:timePosition>
-              </gml:TimeInstant>
-            </om:resultTime>
-            <om:procedure>
-              <wml2:ObservationProcess gml:id="{{ sourcedocs_data.observationProcessId }}">
-                <wml2:processType xlink:href="http://www.opengis.net/def/waterml/2.0/processType/Algorithm"/>
-                <wml2:processReference xlink:href="urn:bro:gld:ProcessReference:NEN5120v1991"/>
-                <wml2:parameter>
+  xmlns:wml2="http://www.opengis.net/waterml/2.0"
+  xmlns:gmd="http://www.isotc211.org/2005/gmd"
+  xmlns:gco="http://www.isotc211.org/2005/gco"
+  xmlns:om="http://www.opengis.net/om/2.0"
+  xmlns:swe="http://www.opengis.net/swe/2.0"
+  xmlns:brocom="http://www.broservices.nl/xsd/brocommon/3.0"
+  xmlns:gldcom="http://www.broservices.nl/xsd/gldcommon/1.0"
+  xmlns:gml="http://www.opengis.net/gml/3.2"
+  xmlns:xlink="http://www.w3.org/1999/xlink"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://www.broservices.nl/xsd/isgld/1.0 https://schema.broservices.nl/xsd/isgld/1.0/isgld-messages.xsd">
+  <brocom:requestReference>{{ metadata.requestReference }}</brocom:requestReference>
+  <brocom:deliveryAccountableParty>{{ metadata.deliveryAccountableParty }}</brocom:deliveryAccountableParty>
+  <brocom:broId>{{ metadata.broId }}</brocom:broId>
+  <brocom:qualityRegime>{{ metadata.qualityRegime }}</brocom:qualityRegime>
+  <correctionReason codeSpace="urn:bro:gmn:CorrectionReason">{{ metadata.correctionReason }}</correctionReason>
+  <sourceDocument>
+    <GLD_Addition gml:id="id_0001">
+      <observation>
+        <om:OM_Observation gml:id="{{ sourcedocs_data.observationId }}">
+          <om:type xlink:href="http://www.opengis.net/def/observationType/waterml/2.0/MeasurementTimeseriesTVPObservation"/>
+          <om:metadata>
+            <wml2:ObservationMetadata>
+              <gmd:contact>
+                <gmd:CI_ResponsibleParty>
+                  <gmd:organisationName>
+                    <gco:CharacterString/>
+                  </gmd:organisationName>
+                  <gmd:role>
+                    <gmd:CI_RoleCode codeList="urn:ISO:19115:CI_RoleCode" codeListValue="principalInvestigator">principalInvestigator</gmd:CI_RoleCode>
+                  </gmd:role>
+                </gmd:CI_ResponsibleParty>
+              </gmd:contact>
+              <gmd:dateStamp>
+                <gco:Date>{{ sourcedocs_data.date }}</gco:Date>
+              </gmd:dateStamp>
+              <gmd:identificationInfo gco:nilReason="unknown"/>
+              <wml2:status xlink:href="urn:bro:gld:StatusCode:voorlopig"/>
+              <wml2:parameter>
+                <om:NamedValue>
+                  <om:name xlink:href="urn:bro:gld:ObservationMetadata:principalInvestigator"/>
+                  <om:value xsi:type="gldcom:OrganizationType">
+                    <gldcom:chamberOfCommerceNumber>{{ sourcedocs_data.investigatorKvk }}</gldcom:chamberOfCommerceNumber>
+                  </om:value>
+                </om:NamedValue>
+              </wml2:parameter>
+              <wml2:parameter>
+                <om:NamedValue>
+                  <om:name xlink:href="urn:bro:gld:ObservationMetadata:observationType"/>
+                  <om:value xsi:type="gml:CodeWithAuthorityType" codeSpace="urn:bro:gld:ObservationType">{{ sourcedocs_data.observationType }}</om:value>
+                </om:NamedValue>
+              </wml2:parameter>
+            </wml2:ObservationMetadata>
+          </om:metadata>
+          <om:phenomenonTime>
+            <gml:TimePeriod gml:id="id_0005">
+              <gml:beginPosition>{{ sourcedocs_data.beginPosition }}</gml:beginPosition>
+              <gml:endPosition>{{ sourcedocs_data.endPosition }}</gml:endPosition>
+            </gml:TimePeriod>
+          </om:phenomenonTime>
+          <om:resultTime>
+            <gml:TimeInstant gml:id="id_0006">
+              <gml:timePosition>{{ sourcedocs_data.resultTime }}</gml:timePosition>
+            </gml:TimeInstant>
+          </om:resultTime>
+          <om:procedure>
+            <wml2:ObservationProcess gml:id="{{ sourcedocs_data.observationProcessId }}">
+              <wml2:processType xlink:href="http://www.opengis.net/def/waterml/2.0/processType/Algorithm"/>
+              <wml2:processReference xlink:href="urn:bro:gld:ProcessReference:{{ sourcedocs_data.processReference }}"/>
+  {%          if sourcedocs_data.airPressureCompensationType %}
+              <wml2:parameter>
+                <om:NamedValue>
+                  <om:name xlink:href="urn:bro:gld:ObservationProcess:airPressureCompensationType"/>
+                  <om:value xsi:type="gml:CodeWithAuthorityType" codeSpace="urn:bro:gld:AirPressureCompensationType">{{ sourcedocs_data.airPressureCompensationType }}</om:value>
+                </om:NamedValue>
+              </wml2:parameter>
+  {%          endif %}
+              <wml2:parameter>
                   <om:NamedValue>
                     <om:name xlink:href="urn:bro:gld:ObservationProcess:evaluationProcedure"/>
                     <om:value xsi:type="gml:CodeWithAuthorityType" codeSpace="urn:bro:gld:EvaluationProcedure">{{ sourcedocs_data.evaluationProcedure }}</om:value>
@@ -85,30 +93,30 @@
             <om:observedProperty/>
             <om:featureOfInterest/>
             <om:result>
-              <wml2:MeasurementTimeseries gml:id="{{ sourcedocs_data.measurementTimeseriesId }}">
+            <wml2:MeasurementTimeseries gml:id="{{ sourcedocs_data.measurementTimeseriesId }}">
 {%              for tvp in sourcedocs_data.timeValuePairs %}
-                <wml2:point>
-                  <wml2:MeasurementTVP>
-                    <wml2:time>{{ tvp.time }}</wml2:time>
-                    <wml2:value uom="m">{{ tvp.value }}</wml2:value>
-                    <wml2:metadata>
-                      <wml2:TVPMeasurementMetadata>
-                        <wml2:qualifier>
-                          <swe:Category>
-                            <swe:codeSpace xlink:href="urn:bro:gld:StatusQualityControl"/>
-                            <swe:value>{{ tvp.statusQualityControl }}</swe:value>
-                          </swe:Category>
-                        </wml2:qualifier>
-                        <wml2:interpolationType xlink:href="http://www.opengis.net/def/waterml/2.0/interpolationType/Discontinuous"/>
-                      </wml2:TVPMeasurementMetadata>
-                    </wml2:metadata>
-                  </wml2:MeasurementTVP>
-                </wml2:point>
+              <wml2:point>
+                <wml2:MeasurementTVP>
+                  <wml2:time>{{ tvp.time }}</wml2:time>
+                  <wml2:value uom="m">{{ tvp.value }}</wml2:value>
+                  <wml2:metadata>
+                    <wml2:TVPMeasurementMetadata>
+                      <wml2:qualifier>
+                        <swe:Category>
+                          <swe:codeSpace xlink:href="urn:bro:gld:StatusQualityControl"/>
+                          <swe:value>{{ tvp.statusQualityControl }}</swe:value>
+                        </swe:Category>
+                      </wml2:qualifier>
+                      <wml2:interpolationType xlink:href="http://www.opengis.net/def/waterml/2.0/interpolationType/Discontinuous"/>
+                    </wml2:TVPMeasurementMetadata>
+                  </wml2:metadata>
+                </wml2:MeasurementTVP>
+              </wml2:point>
 {%              endfor %}
-              </wml2:MeasurementTimeseries>
-            </om:result>
-          </om:OM_Observation>
-        </observation>
-      </GLD_Addition>
-    </sourceDocument>
-  </deleteRequest>
+            </wml2:MeasurementTimeseries>
+          </om:result>
+        </om:OM_Observation>
+      </observation>
+    </GLD_Addition>
+  </sourceDocument>
+</deleteRequest>
diff --git a/api/bro_upload/templates/registration_GLD_Addition.html b/api/bro_upload/templates/registration_GLD_Addition.html
index 3d6df8a1..acde76f0 100644
--- a/api/bro_upload/templates/registration_GLD_Addition.html
+++ b/api/bro_upload/templates/registration_GLD_Addition.html
@@ -72,7 +72,15 @@
           <om:procedure>
             <wml2:ObservationProcess gml:id="{{ sourcedocs_data.observationProcessId }}">
               <wml2:processType xlink:href="http://www.opengis.net/def/waterml/2.0/processType/Algorithm"/>
-              <wml2:processReference xlink:href="urn:bro:gld:ProcessReference:NEN5120v1991"/>
+              <wml2:processReference xlink:href="urn:bro:gld:ProcessReference:{{ sourcedocs_data.processReference }}"/>
+{%            if sourcedocs_data.airPressureCompensationType %}
+              <wml2:parameter>
+                <om:NamedValue>
+                  <om:name xlink:href="urn:bro:gld:ObservationProcess:airPressureCompensationType"/>
+                  <om:value xsi:type="gml:CodeWithAuthorityType" codeSpace="urn:bro:gld:AirPressureCompensationType">{{ sourcedocs_data.airPressureCompensationType }}</om:value>
+                </om:NamedValue>
+              </wml2:parameter>
+{%            endif %}
               <wml2:parameter>
                 <om:NamedValue>
                   <om:name xlink:href="urn:bro:gld:ObservationProcess:evaluationProcedure"/>
diff --git a/api/bro_upload/templates/replace_GLD_Addition.html b/api/bro_upload/templates/replace_GLD_Addition.html
index 25a11333..7dd30044 100644
--- a/api/bro_upload/templates/replace_GLD_Addition.html
+++ b/api/bro_upload/templates/replace_GLD_Addition.html
@@ -72,7 +72,15 @@
           <om:procedure>
             <wml2:ObservationProcess gml:id="{{ sourcedocs_data.observationProcessId }}">
               <wml2:processType xlink:href="http://www.opengis.net/def/waterml/2.0/processType/Algorithm"/>
-              <wml2:processReference xlink:href="urn:bro:gld:ProcessReference:NEN5120v1991"/>
+              <wml2:processReference xlink:href="urn:bro:gld:ProcessReference:{{ sourcedocs_data.processReference }}"/>
+{%            if sourcedocs_data.airPressureCompensationType %}
+              <wml2:parameter>
+                <om:NamedValue>
+                  <om:name xlink:href="urn:bro:gld:ObservationProcess:airPressureCompensationType"/>
+                  <om:value xsi:type="gml:CodeWithAuthorityType" codeSpace="urn:bro:gld:AirPressureCompensationType">{{ sourcedocs_data.airPressureCompensationType }}</om:value>
+                </om:NamedValue>
+              </wml2:parameter>
+{%            endif %}
               <wml2:parameter>
                 <om:NamedValue>
                   <om:name xlink:href="urn:bro:gld:ObservationProcess:evaluationProcedure"/>
diff --git a/api/bro_upload/upload_datamodels.py b/api/bro_upload/upload_datamodels.py
index 13789c67..8222e8eb 100644
--- a/api/bro_upload/upload_datamodels.py
+++ b/api/bro_upload/upload_datamodels.py
@@ -305,8 +305,6 @@ class GAR(BaseModel):
 
 
 # GLD
-
-
 class GLDStartregistration(BaseModel):
     objectIdAccountableParty: str | None = None
     groundwaterMonitoringNets: list[str] | None = None
@@ -339,6 +337,8 @@ class GLDAddition(BaseModel):
     observationType: str
     evaluationProcedure: str
     measurementInstrumentType: str
+    processReference: str
+    airPressureCompensationType: str | None = None
     beginPosition: str
     endPosition: str
     resultTime: str