--- /dev/null
+<?php
+
+namespace Drupal\system\Plugin\migrate\process\d6;
+
+use Drupal\migrate\MigrateExecutableInterface;
+use Drupal\migrate\ProcessPluginBase;
+use Drupal\migrate\Row;
+
+/**
+ * Rename blog and forum permissions to be consistent with other content types.
+ *
+ * @MigrateProcessPlugin(
+ * id = "system_update_7000"
+ * )
+ */
+class SystemUpdate7000 extends ProcessPluginBase {
+
+ /**
+ * {@inheritdoc}
+ *
+ * Rename blog and forum permissions to be consistent with other content types.
+ */
+ public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
+ $value = preg_replace('/(?<=^|,\ )create\ blog\ entries(?=,|$)/', 'create blog content', $value);
+ $value = preg_replace('/(?<=^|,\ )edit\ own\ blog\ entries(?=,|$)/', 'edit own blog content', $value);
+ $value = preg_replace('/(?<=^|,\ )edit\ any\ blog\ entry(?=,|$)/', 'edit any blog content', $value);
+ $value = preg_replace('/(?<=^|,\ )delete\ own\ blog\ entries(?=,|$)/', 'delete own blog content', $value);
+ $value = preg_replace('/(?<=^|,\ )delete\ any\ blog\ entry(?=,|$)/', 'delete any blog content', $value);
+
+ $value = preg_replace('/(?<=^|,\ )create\ forum\ topics(?=,|$)/', 'create forum content', $value);
+ $value = preg_replace('/(?<=^|,\ )delete\ any\ forum\ topic(?=,|$)/', 'delete any forum content', $value);
+ $value = preg_replace('/(?<=^|,\ )delete\ own\ forum\ topics(?=,|$)/', 'delete own forum content', $value);
+ $value = preg_replace('/(?<=^|,\ )edit\ any\ forum\ topic(?=,|$)/', 'edit any forum content', $value);
+ $value = preg_replace('/(?<=^|,\ )edit\ own\ forum\ topics(?=,|$)/', 'edit own forum content', $value);
+ return $value;
+ }
+
+}