Update model.md

Author: Rob Sanderson

source/presentation/4.0/model.md

@@ -1457,13 +1457,13 @@ For a IIIF Image API Selector:
 ### height
 {: #height}
 
-The height of the Canvas or external content resource. For content resources, the value is in pixels. For Canvases, the value does not have a unit. In combination with the width, it conveys an aspect ratio for the space in which content resources are located.
+The height of the Canvas or external Content Resource. For Content Resources, the value is in pixels. For Canvases, the value does not have a unit. Instead, in combination with the `width` property, it conveys an aspect ratio for the space in which Content Resources are located.
 
 The value _MUST_ be a positive integer.
 
  * A Canvas _MUST_ have the `height` property.<br/>
    Clients _MUST_ process `height` on a Canvas.
- * Content resources _SHOULD_ have the `height` property, with the value given in pixels, if appropriate to the resource type.<br/>
+ * Content Resources _SHOULD_ have the `height` property, with the value given in pixels, if appropriate to the resource type.<br/>
    Clients _SHOULD_ process `height` on content resources.
  * Other types of resource _MUST NOT_ have the `height` property.<br/>
    Clients _SHOULD_ ignore `height` on other types of resource.
@@ -1475,7 +1475,7 @@ The value _MUST_ be a positive integer.
 ### homepage
 {: #homepage}
 
-A web page that is about the object represented by the resource that has the `homepage` property. The web page is usually published by the organization responsible for the object, and might be generated by a content management system or other cataloging system. The resource _MUST_ be able to be displayed directly to the user. Resources that are related, but not home pages, _MUST_ instead be added into the `metadata` property, with an appropriate `label` or `value` to describe the relationship.
+A web page that is about the entity represented by the resource that has the `homepage` property. The web page is usually published by the organization responsible for the entity, and might be generated by a content management system or other cataloging system. The resource _MUST_ be able to be displayed directly to the user. Resources that are related, but not home pages, _MUST_ instead be added into the `metadata` property, with an appropriate `label` or `value` to describe the relationship.
 
 The value of this property _MUST_ be an array of JSON objects, each of which _MUST_ have the `id`, `type`, and `label` properties, _SHOULD_ have a `format` property, and _MAY_ have the `language` property.