diff --git a/base_classes/NXparameters.nxdl.xml b/base_classes/NXparameters.nxdl.xml
index 99a7423470..cbacff5ace 100644
--- a/base_classes/NXparameters.nxdl.xml
+++ b/base_classes/NXparameters.nxdl.xml
@@ -27,7 +27,7 @@
     name="NXparameters" 
 	type="group" extends="NXobject">
     <doc>Container for parameters, usually used in processing or analysis.</doc>
-    <field name="TERM" minOccurs="0" maxOccurs="unbounded" nameType="any">
+    <field name="TERM"  nameType="any" type="NX_CHAR_OR_NUMBER" units="NX_ANY" minOccurs="0" maxOccurs="unbounded">
         <!-- maxOccurs="unbounded" is intended but is not allowed by current syntax -->
         <doc>A parameter (also known as a term) that is used in or results from processing.</doc>
         <attribute name="units"/>
diff --git a/base_classes/nyaml/NXparameters.yaml b/base_classes/nyaml/NXparameters.yaml
index f49d356a57..e608013df7 100644
--- a/base_classes/nyaml/NXparameters.yaml
+++ b/base_classes/nyaml/NXparameters.yaml
@@ -3,9 +3,10 @@ doc: |
   Container for parameters, usually used in processing or analysis.
 type: group
 NXparameters(NXobject):
-  TERM:
-    exists: ['min', '0', 'max', 'unbounded']
+  TERM(NX_CHAR_OR_NUMBER):
     nameType: any
+    unit: NX_ANY
+    exists: ['min', '0', 'max', 'unbounded']
     
     # maxOccurs="unbounded" is intended but is not allowed by current syntax
     doc: |
@@ -13,7 +14,7 @@ NXparameters(NXobject):
     \@units:
 
 # ++++++++++++++++++++++++++++++++++ SHA HASH ++++++++++++++++++++++++++++++++++
-# 39767f24c386bbbf096fdae88c54eb252d7cc61251b070c2c37bc769960216c1
+# 6e09425dad7dc441e3e0d296a47635cdf4c85a33731c5ab4b64451705ab6556a
 # <?xml version="1.0" encoding="UTF-8"?>
 # <?xml-stylesheet type="text/xsl" href="nxdlformat.xsl" ?>
 # <!--
@@ -43,7 +44,7 @@ NXparameters(NXobject):
 #     name="NXparameters" 
 # 	type="group" extends="NXobject">
 #     <doc>Container for parameters, usually used in processing or analysis.</doc>
-#     <field name="TERM" minOccurs="0" maxOccurs="unbounded" nameType="any">
+#     <field name="TERM"  nameType="any" type="NX_CHAR_OR_NUMBER" units="NX_ANY" minOccurs="0" maxOccurs="unbounded">
 #         <!-- maxOccurs="unbounded" is intended but is not allowed by current syntax -->
 #         <doc>A parameter (also known as a term) that is used in or results from processing.</doc>
 #         <attribute name="units"/>
diff --git a/contributed_definitions/NXmpes.nxdl.xml b/contributed_definitions/NXmpes.nxdl.xml
index 8b03601e98..980e4d170c 100644
--- a/contributed_definitions/NXmpes.nxdl.xml
+++ b/contributed_definitions/NXmpes.nxdl.xml
@@ -215,6 +215,12 @@
                     </doc>
                 </field>
             </group>
+            <group type="NXresolution" optional="true">
+                <doc>
+                    Any further resolution information about the instrument. For example, the angular
+                    resolution of the instrument if the spectrometer is angle-resolving.
+                </doc>
+            </group>
             <group name="device_information" type="NXfabrication" recommended="true">
                 <field name="vendor" recommended="true"/>
                 <field name="model" recommended="true"/>
@@ -1022,7 +1028,7 @@
                 </attribute>
                 <attribute name="axes">
                     <enumeration>
-                        <item value="kinetic_energy"/>
+                        <item value="['kinetic_energy']"/>
                     </enumeration>
                 </attribute>
                 <field name="kinetic_energy" type="NX_FLOAT" units="NX_ENERGY">
diff --git a/contributed_definitions/nyaml/NXmpes.yaml b/contributed_definitions/nyaml/NXmpes.yaml
index 6955fc44a6..841b81fb68 100644
--- a/contributed_definitions/nyaml/NXmpes.yaml
+++ b/contributed_definitions/nyaml/NXmpes.yaml
@@ -174,6 +174,11 @@ NXmpes(NXobject):
               spec: ISO 18115-1:2023
               term: 10.7 ff.
               url: https://www.iso.org/obp/ui/en/#iso:std:iso:18115:-1:ed-3:v1:en:term:10.7
+      (NXresolution):
+        exists: optional
+        doc: |
+          Any further resolution information about the instrument. For example, the angular
+          resolution of the instrument if the spectrometer is angle-resolving.
       device_information(NXfabrication):
         exists: recommended
         vendor:
@@ -946,7 +951,7 @@ NXmpes(NXobject):
         \@signal:
           enumeration: [relative_intensity]
         \@axes:
-          enumeration: [kinetic_energy]
+          enumeration: [['kinetic_energy']]
         kinetic_energy(NX_FLOAT):
           unit: NX_ENERGY
           doc: |
@@ -1342,7 +1347,7 @@ NXmpes(NXobject):
           /entry/sample/temperature_env/temperature_sensor/value.
 
 # ++++++++++++++++++++++++++++++++++ SHA HASH ++++++++++++++++++++++++++++++++++
-# 42c16f3b18f5cbb48055a823da46ddada90200db6ea2bca9fe97b2fb6aec815d
+# 487933937d4e3cb272f8b41a8b9fae3427a741b986f5574de6beb3566a612c23
 # <?xml version='1.0' encoding='UTF-8'?>
 # <?xml-stylesheet type="text/xsl" href="nxdlformat.xsl"?>
 # <!--
@@ -1560,6 +1565,12 @@ NXmpes(NXobject):
 #                     </doc>
 #                 </field>
 #             </group>
+#             <group type="NXresolution" optional="true">
+#                 <doc>
+#                     Any further resolution information about the instrument. For example, the angular
+#                     resolution of the instrument if the spectrometer is angle-resolving.
+#                 </doc>
+#             </group>
 #             <group name="device_information" type="NXfabrication" recommended="true">
 #                 <field name="vendor" recommended="true"/>
 #                 <field name="model" recommended="true"/>
@@ -2367,7 +2378,7 @@ NXmpes(NXobject):
 #                 </attribute>
 #                 <attribute name="axes">
 #                     <enumeration>
-#                         <item value="kinetic_energy"/>
+#                         <item value="['kinetic_energy']"/>
 #                     </enumeration>
 #                 </attribute>
 #                 <field name="kinetic_energy" type="NX_FLOAT" units="NX_ENERGY">