diff --git a/src/Main.php b/src/Main.php
index 73fc94c..b514cb3 100644
--- a/src/Main.php
+++ b/src/Main.php
@@ -25,7 +25,7 @@ use Twig\Loader\ArrayLoader;
 use ZipArchive;
 
 /**
- * The "main" command
+ * The “main” command
  */
 class Main {
     /**
@@ -34,14 +34,16 @@ class Main {
     private const string ARGUMENT_FILES = 'files';
 
     private const string DOM_NAMESPACE_ATTRIBUTE = 'http://www.w3.org/2000/xmlns/';
-    private const string OPF_NAMESPACE_DC        = 'http://purl.org/dc/elements/1.1/';
-    private const string OPF_NAMESPACE_OPF       = 'http://www.idpf.org/2007/opf';
+    /** @noinspection HttpUrlsUsage */
+    private const string OPF_NAMESPACE_DC  = 'http://purl.org/dc/elements/1.1/';
+    /** @noinspection HttpUrlsUsage */
+    private const string OPF_NAMESPACE_OPF = 'http://www.idpf.org/2007/opf';
 
     private const string TWIG_TEMPLATE_METADATA_DESCRIPTION = 'metadata_description.html';
     private const array  TWIG_TEMPLATES                     = [
         self::TWIG_TEMPLATE_METADATA_DESCRIPTION => <<<'TWIG'
 <div>
-    <p>{{ description }}</p>
+    <p>{{ summary }}</p>
     <p><strong>Chapters:</strong> {{ chapters ?? 1 }}</p>
     <p><strong>Word count:</strong> {{ words }}</p>
     <p><strong>Published:</strong> {{ publishDate }}</p>
@@ -478,12 +480,12 @@ EOF
         }
         //endregion
         //region Delete description if present
-        //region Deletion form DOM
+        //region Deletion from DOM
         $rootFileDirty = false;
         /** @noinspection HttpUrlsUsage */
         $rootFileXPath->registerNamespace('dc', 'http://purl.org/dc/elements/1.1/');
         if (($descriptionNodeList = $rootFileXPath->query('/r:package/r:metadata/dc:description')) !== false && $descriptionNodeList->count() > 0) {
-            $output->writeln($descriptionNodeList->count() . ' descriptions found → removing', OutputInterface::VERBOSITY_VERBOSE);
+            $output->writeln($descriptionNodeList->count() . ' existing descriptions found → removing', OutputInterface::VERBOSITY_VERBOSE);
             /** @var DOMNode $descriptionNode */
             foreach ($descriptionNodeList as $descriptionNode) {
                 $descriptionNode->parentNode->removeChild($descriptionNode);
@@ -491,7 +493,7 @@ EOF
             }
         }
         else {
-            $output->writeln('no descriptions found', OutputInterface::VERBOSITY_VERBOSE);
+            $output->writeln('No existing description found', OutputInterface::VERBOSITY_VERBOSE);
         }
         //endregion
         //region Overwrite root file in ZIP
@@ -524,7 +526,6 @@ EOF
                 return;
             }
 
-            /** @noinspection PhpVoidFunctionResultUsedInspection */
             if (!$fileArchive->replaceFile(
                 $rootFilePathTemp,
                 $rootFileIndex,