Apply suggestions from @lzehl

Author: Raphael-Gazzotti

schemas/data/copyright.schema.tpl.json

@@ -14,7 +14,7 @@
          "legalPerson"
       ]
     },
-    "rightsReservationClause": {
+    "customUsageClause": {
       "type": "string",
       "_instruction": "Enter a statement describing the usage rights, such as 'All rights reserved.'."
     },

schemas/data/usageAgreement.schema.tpl.json

@@ -28,13 +28,6 @@
         "jurisdiction"
       ]
     },
-    "mainContact": {
-      "type": "string",
-      "_formats": [
-        "email"
-      ],
-      "_instruction": "Enter the email address of the party authoring this usage agreement."
-    },
     "modificationClause": {
       "type": "array",
       "minItems": 1,
@@ -58,6 +51,19 @@
         "core:UsageAgreement"
       ]
     },
+    "supportChannel": {
+      "type": "array",
+      "minItems": 1,
+      "uniqueItems": true,
+      "_instruction": "Enter all channels through which users can obtain support and initiate negotiations regarding this usage agreement with the authoring party.",
+      "items": {
+        "type": "string",
+        "_formats": [
+          "email",
+          "iri"
+        ]
+      }
+    },
     "template": {
       "_instruction": "Add the web resource that supplies the template for this usage agreement.",
       "_linkedTypes": [

schemas/products/researchProductVersion.schema.tpl.json

@@ -8,7 +8,7 @@
     "isVersionOf",
     "releaseDate",
     "shortName",
-    "usagePermission",
+    "usageCondition",
     "versionIdentifier",
     "versionInnovation"
   ],
@@ -128,7 +128,7 @@
         ]
       }
     },
-    "usagePermission": {
+    "usageCondition": {
       "type": "array",
       "minItems": 1,
       "uniqueItems": true,