minor edits

index.html

@@ -183,7 +183,7 @@ <h3>Terminology</h3>
 					<dt><dfn data-lt="Manifests">Manifest</dfn></dt>
 					<dd>
 						<p>
-							A manifest represents structured information about a <a>Web Publication</a>, such as informative metadata, a list of all <a data-lt="primary resource">primary</a> and <a>secondary resources</a>, and the <a>default reading order</a>.
+							A manifest represents structured information about a <a>Web Publication</a>, such as informative metadata, a list of all <a data-lt="primary resource">primary</a> and <a>secondary resources</a>, and a <a>default reading order</a>.
 						</p>
 					</dd>
 
@@ -198,7 +198,7 @@ <h3>Terminology</h3>
 					<dt><dfn data-lt="Identifier|WP Identifier">(Persistent) Identifier</dfn></dt>
 					<dd>
 						<p>
-							An identifier is a metadata that can be used to refer to a <a class="externalDFN" href="https://www.w3.org/TR/publishing-linking/#dfn-web-content">Web Content</a> in a persistent and unambiguous manner.
+							An identifier is metadata that can be used to refer to a <a class="externalDFN" href="https://www.w3.org/TR/publishing-linking/#dfn-web-content">Web Content</a> in a persistent and unambiguous manner.
 							URLs, URNs, DOIs, ISBNs, or PURLs are all examples of identifiers frequently used in publishing.
 						</p>
 					</dd>