sub-class --> subclass etc

Author: dr-shorthair

ssn/usage/index.html

@@ -644,7 +644,7 @@ <h2>Term usage</h2>
             <td>AEMET, BCI, Energy, IoT-O, RAMI, SAN, SPITFIRE, VITAL, IoT, FixO3, SEAS-SSN Alignment, LSO, ABIS, TERN,
               IDO-SSN Alignment, Eautonome, GloSIS, KnowWhereGraph</td>
             <td></td>
-            <td>Includes usage of deprecated sub-classes `ObservableProperty` and `ActuatableProperty`</td>
+            <td>Includes usage of deprecated subclasses `ObservableProperty` and `ActuatableProperty`</td>
           </tr>
           <tr>
             <td>
@@ -710,7 +710,7 @@ <h2>Term usage</h2>
             <td>IoT-O, OpenIoT, PEP-SSN ALignment, SAN, IoT, FixO3, SEAS-SSN Alignment, TERN, IDO-SSN Alignment,
               Eautonome, GloSIS</td>
             <td></td>
-            <td>Also see entries for sub-classes `sosa:ActuatingProcedure`, `sosa:ObservingProcedure`,
+            <td>Also see entries for subclasses `sosa:ActuatingProcedure`, `sosa:ObservingProcedure`,
               `sosa:SamplingProcedure`</td>
           </tr>
           <tr>
@@ -776,7 +776,7 @@ <h2>Term usage</h2>
             <td>-</td>
             <td>-</td>
             <td>`Execution` is considered to be abstract so is not used directly.
-              Individual Executions are typed with one of the (concrete) sub-classes:
+              Individual Executions are typed with one of the (concrete) subclasses:
               `Actuation`, `Observation` or `Sampling`. </td>
           </tr>
           <tr>
@@ -787,7 +787,7 @@ <h2>Term usage</h2>
             <td>-</td>
             <td>-</td>
             <td>`ExecutionCollection` is considered to be abstract so is not used directly.
-              Individual ExecutionCollections are typed with one of the (concrete) sub-classes:
+              Individual ExecutionCollections are typed with one of the (concrete) subclasses:
               `ActuationCollection`, `ObservationCollection` or `SamplingCollection`. </td>
           </tr>
           <tr>
@@ -841,7 +841,7 @@ <h2>Term usage</h2>
             <td>-</td>
             <td>-</td>
             <td>`madeBySystem` and `madeExecution` are considered to be abstract so are not used directly.
-              Applications use a concrete sub-property: `madeByActuator`, `madeBySensor` or `madeBySampler` and
+              Applications use a concrete subproperty: `madeByActuator`, `madeBySensor` or `madeBySampler` and
               `madeActuation` `madeObservation` `madeSampling`</td>
           </tr>
           <tr>
@@ -881,7 +881,7 @@ <h2>Term usage</h2>
             <td>-</td>
             <td>-</td>
             <td>`Asset` is considered to be abstract so is not used directly.
-              Individual Assets are typed with one of the (concrete) sub-classes:
+              Individual Assets are typed with one of the (concrete) subclasses:
               `System` or `Platform`.</td>
           </tr>
           <tr>
@@ -910,7 +910,7 @@ <h2>Term usage</h2>
             <td>iot-lite, IoT-O, VITAL, IoT, FixO3, SEAS-SSN Alignment, IDO-SSN Alignment, Eautonome</td>
             <td></td>
             <td>`System` is considered to be abstract so is not normally used directly.
-              Individual Systems are typed with one of the (concrete) sub-classes:
+              Individual Systems are typed with one of the (concrete) subclasses:
               `Actuator`, `Sensor`, or `Sampler`.</td>
           </tr>
           <tr>