- * grfx::Cache is a singleton class. It is possible to have only one
- * instance of it at any moment.
+ * lyx::graphics::Cache is the manager of the image cache.
+ * It is responsible for creating the lyx::graphics::CacheItem's
+ * and maintaining them.
+ *
+ * lyx::graphics::Cache is a singleton class. It is possible to have only one
+ * instance of it at any moment.