diff --git a/author.php b/author.php
index 4ba2dd1..61c2e34 100644
--- a/author.php
+++ b/author.php
@@ -9,7 +9,7 @@
 require_once('base.php');
 
 class Author extends Base {
-    const ALL_AUTHORS_ID = "calibre:authors";
+    const ALL_AUTHORS_ID = "cops:authors";
     
     const AUTHOR_COLUMNS = "authors.id as id, authors.name as name, authors.sort as sort, count(*) as count";
     const SQL_AUTHORS_BY_FIRST_LETTER = "select {0} from authors, books_authors_link where author = authors.id and upper (authors.sort) like ? group by authors.id, authors.name, authors.sort order by sort";
diff --git a/base.php b/base.php
index 9382aa0..23e80e9 100644
--- a/base.php
+++ b/base.php
@@ -276,8 +276,8 @@ class Entry
         Tag::ALL_TAGS_ID             => 'images/tag.png',
         Language::ALL_LANGUAGES_ID   => 'images/language.png',
         CustomColumn::ALL_CUSTOMS_ID => 'images/tag.png',
-        "calibre:books$"             => 'images/allbook.png',
-        "calibre:books:letter"       => 'images/allbook.png'
+        "cops:books$"             => 'images/allbook.png',
+        "cops:books:letter"       => 'images/allbook.png'
     );
 
     public function getUpdatedTime () {
@@ -322,7 +322,7 @@ class Entry
             }
         }
 
-        if (!is_null (GetUrlParam (DB))) $this->id = GetUrlParam (DB) . ":" . $this->id;
+        if (!is_null (GetUrlParam (DB))) $this->id = str_replace ("cops:", "cops:" . GetUrlParam (DB) . ":", $this->id);
     }
 }
 
diff --git a/book.php b/book.php
index b0f8325..b2f954d 100644
--- a/book.php
+++ b/book.php
@@ -42,8 +42,8 @@ define ('SQL_BOOKS_RECENT', "select {0} from books " . SQL_BOOKS_LEFT_JOIN . "
 
 class Book extends Base {
     const ALL_BOOKS_UUID = "urn:uuid";
-    const ALL_BOOKS_ID = "calibre:books";
-    const ALL_RECENT_BOOKS_ID = "calibre:recentbooks";
+    const ALL_BOOKS_ID = "cops:books";
+    const ALL_RECENT_BOOKS_ID = "cops:recentbooks";
     const BOOK_COLUMNS = "books.id as id, books.title as title, text as comment, path, timestamp, pubdate, series_index, uuid, has_cover, ratings.rating";
     
     const SQL_BOOKS_LEFT_JOIN = SQL_BOOKS_LEFT_JOIN;
diff --git a/customcolumn.php b/customcolumn.php
index 63deb82..bc91502 100644
--- a/customcolumn.php
+++ b/customcolumn.php
@@ -9,7 +9,7 @@
 require_once('base.php');
 
 class CustomColumn extends Base {
-    const ALL_CUSTOMS_ID = "calibre:custom";
+    const ALL_CUSTOMS_ID = "cops:custom";
     
     public $id;
     public $name;
diff --git a/language.php b/language.php
index 443d40b..c40cac6 100644
--- a/language.php
+++ b/language.php
@@ -9,7 +9,7 @@
 require_once('base.php');
 
 class language extends Base {
-    const ALL_LANGUAGES_ID = "calibre:languages";
+    const ALL_LANGUAGES_ID = "cops:languages";
     
     public $id;
     public $lang_code;
diff --git a/serie.php b/serie.php
index b377881..7de137f 100644
--- a/serie.php
+++ b/serie.php
@@ -9,7 +9,7 @@
 require_once('base.php');
 
 class Serie extends Base {
-    const ALL_SERIES_ID = "calibre:series";
+    const ALL_SERIES_ID = "cops:series";
     
     public $id;
     public $name;
diff --git a/tag.php b/tag.php
index b3d9a23..ad20d7f 100644
--- a/tag.php
+++ b/tag.php
@@ -9,7 +9,7 @@
 require_once('base.php');
 
 class tag extends Base {
-    const ALL_TAGS_ID = "calibre:tags";
+    const ALL_TAGS_ID = "cops:tags";
     
     public $id;
     public $name;