diff --git a/library/HTMLPurifier/HTMLDefinition.php b/library/HTMLPurifier/HTMLDefinition.php
index 0aea5209..97a1d5c4 100644
--- a/library/HTMLPurifier/HTMLDefinition.php
+++ b/library/HTMLPurifier/HTMLDefinition.php
@@ -18,6 +18,9 @@ require_once 'HTMLPurifier/AttrTransform/ImgRequired.php';
 
 // temporary: tag transformations
 require_once 'HTMLPurifier/TagTransform.php';
+require_once 'HTMLPurifier/TagTransform/Simple.php';
+require_once 'HTMLPurifier/TagTransform/Center.php';
+require_once 'HTMLPurifier/TagTransform/Font.php';
 
 // default modules
 require_once 'HTMLPurifier/HTMLModule.php';
diff --git a/library/HTMLPurifier/TagTransform.php b/library/HTMLPurifier/TagTransform.php
index be0555a0..f5dc5c97 100644
--- a/library/HTMLPurifier/TagTransform.php
+++ b/library/HTMLPurifier/TagTransform.php
@@ -1,6 +1,6 @@
 <?php
 
-require_once('HTMLPurifier/Token.php');
+require_once 'HTMLPurifier/Token.php';
 
 /**
  * Defines a mutation of an obsolete tag into a valid tag.
@@ -26,132 +26,4 @@ class HTMLPurifier_TagTransform
     
 }
 
-/**
- * Simple transformation, just change tag name to something else.
- */
-class HTMLPurifier_TagTransform_Simple extends HTMLPurifier_TagTransform
-{
-    
-    /**
-     * @param $transform_to Tag name to transform to.
-     */
-    function HTMLPurifier_TagTransform_Simple($transform_to) {
-        $this->transform_to = $transform_to;
-    }
-    
-    function transform($tag, $config, &$context) {
-        $new_tag = $tag->copy();
-        $new_tag->name = $this->transform_to;
-        return $new_tag;
-    }
-    
-}
-
-/**
- * Transforms CENTER tags into proper version (DIV with text-align CSS)
- * 
- * Takes a CENTER tag, parses the align attribute, and then if it's valid
- * assigns it to the CSS property text-align.
- */
-class HTMLPurifier_TagTransform_Center extends HTMLPurifier_TagTransform
-{
-    var $transform_to = 'div';
-    
-    function transform($tag, $config, &$context) {
-        if ($tag->type == 'end') {
-            $new_tag = new HTMLPurifier_Token_End($this->transform_to);
-            return $new_tag;
-        }
-        $attr = $tag->attr;
-        $prepend_css = 'text-align:center;';
-        if (isset($attr['style'])) {
-            $attr['style'] = $prepend_css . $attr['style'];
-        } else {
-            $attr['style'] = $prepend_css;
-        }
-        $new_tag = $tag->copy();
-        $new_tag->name = $this->transform_to;
-        $new_tag->attr = $attr;
-        return $new_tag;
-    }
-}
-
-/**
- * Transforms FONT tags to the proper form (SPAN with CSS styling)
- * 
- * This transformation takes the three proprietary attributes of FONT and
- * transforms them into their corresponding CSS attributes.  These are color,
- * face, and size.
- * 
- * @note Size is an interesting case because it doesn't map cleanly to CSS.
- *       Thanks to
- *       http://style.cleverchimp.com/font_size_intervals/altintervals.html
- *       for reasonable mappings.
- */
-class HTMLPurifier_TagTransform_Font extends HTMLPurifier_TagTransform
-{
-    
-    var $transform_to = 'span';
-    
-    var $_size_lookup = array(
-        '1' => 'xx-small',
-        '2' => 'small',
-        '3' => 'medium',
-        '4' => 'large',
-        '5' => 'x-large',
-        '6' => 'xx-large',
-        '7' => '300%',
-        '-1' => 'smaller',
-        '+1' => 'larger',
-        '-2' => '60%',
-        '+2' => '150%',
-        '+4' => '300%'
-    );
-    
-    function transform($tag, $config, &$context) {
-        
-        if ($tag->type == 'end') {
-            $new_tag = new HTMLPurifier_Token_End($this->transform_to);
-            return $new_tag;
-        }
-        
-        $attr = $tag->attr;
-        $prepend_style = '';
-        
-        // handle color transform
-        if (isset($attr['color'])) {
-            $prepend_style .= 'color:' . $attr['color'] . ';';
-            unset($attr['color']);
-        }
-        
-        // handle face transform
-        if (isset($attr['face'])) {
-            $prepend_style .= 'font-family:' . $attr['face'] . ';';
-            unset($attr['face']);
-        }
-        
-        // handle size transform
-        if (isset($attr['size'])) {
-            if (isset($this->_size_lookup[$attr['size']])) {
-                $prepend_style .= 'font-size:' .
-                  $this->_size_lookup[$attr['size']] . ';';
-            }
-            unset($attr['size']);
-        }
-        
-        if ($prepend_style) {
-            $attr['style'] = isset($attr['style']) ?
-                $prepend_style . $attr['style'] :
-                $prepend_style;
-        }
-        
-        $new_tag = $tag->copy();
-        $new_tag->name = $this->transform_to;
-        $new_tag->attr = $attr;
-        
-        return $new_tag;
-        
-    }
-}
-
 ?>
\ No newline at end of file
diff --git a/library/HTMLPurifier/TagTransform/Center.php b/library/HTMLPurifier/TagTransform/Center.php
new file mode 100644
index 00000000..571bb9df
--- /dev/null
+++ b/library/HTMLPurifier/TagTransform/Center.php
@@ -0,0 +1,34 @@
+<?php
+
+require_once 'HTMLPurifier/TagTransform.php';
+
+/**
+ * Transforms CENTER tags into proper version (DIV with text-align CSS)
+ * 
+ * Takes a CENTER tag, parses the align attribute, and then if it's valid
+ * assigns it to the CSS property text-align.
+ */
+class HTMLPurifier_TagTransform_Center extends HTMLPurifier_TagTransform
+{
+    var $transform_to = 'div';
+    
+    function transform($tag, $config, &$context) {
+        if ($tag->type == 'end') {
+            $new_tag = new HTMLPurifier_Token_End($this->transform_to);
+            return $new_tag;
+        }
+        $attr = $tag->attr;
+        $prepend_css = 'text-align:center;';
+        if (isset($attr['style'])) {
+            $attr['style'] = $prepend_css . $attr['style'];
+        } else {
+            $attr['style'] = $prepend_css;
+        }
+        $new_tag = $tag->copy();
+        $new_tag->name = $this->transform_to;
+        $new_tag->attr = $attr;
+        return $new_tag;
+    }
+}
+
+?>
\ No newline at end of file
diff --git a/library/HTMLPurifier/TagTransform/Font.php b/library/HTMLPurifier/TagTransform/Font.php
new file mode 100644
index 00000000..ae6d7838
--- /dev/null
+++ b/library/HTMLPurifier/TagTransform/Font.php
@@ -0,0 +1,83 @@
+<?php
+
+require_once 'HTMLPurifier/TagTransform.php';
+
+/**
+ * Transforms FONT tags to the proper form (SPAN with CSS styling)
+ * 
+ * This transformation takes the three proprietary attributes of FONT and
+ * transforms them into their corresponding CSS attributes.  These are color,
+ * face, and size.
+ * 
+ * @note Size is an interesting case because it doesn't map cleanly to CSS.
+ *       Thanks to
+ *       http://style.cleverchimp.com/font_size_intervals/altintervals.html
+ *       for reasonable mappings.
+ */
+class HTMLPurifier_TagTransform_Font extends HTMLPurifier_TagTransform
+{
+    
+    var $transform_to = 'span';
+    
+    var $_size_lookup = array(
+        '1' => 'xx-small',
+        '2' => 'small',
+        '3' => 'medium',
+        '4' => 'large',
+        '5' => 'x-large',
+        '6' => 'xx-large',
+        '7' => '300%',
+        '-1' => 'smaller',
+        '+1' => 'larger',
+        '-2' => '60%',
+        '+2' => '150%',
+        '+4' => '300%'
+    );
+    
+    function transform($tag, $config, &$context) {
+        
+        if ($tag->type == 'end') {
+            $new_tag = new HTMLPurifier_Token_End($this->transform_to);
+            return $new_tag;
+        }
+        
+        $attr = $tag->attr;
+        $prepend_style = '';
+        
+        // handle color transform
+        if (isset($attr['color'])) {
+            $prepend_style .= 'color:' . $attr['color'] . ';';
+            unset($attr['color']);
+        }
+        
+        // handle face transform
+        if (isset($attr['face'])) {
+            $prepend_style .= 'font-family:' . $attr['face'] . ';';
+            unset($attr['face']);
+        }
+        
+        // handle size transform
+        if (isset($attr['size'])) {
+            if (isset($this->_size_lookup[$attr['size']])) {
+                $prepend_style .= 'font-size:' .
+                  $this->_size_lookup[$attr['size']] . ';';
+            }
+            unset($attr['size']);
+        }
+        
+        if ($prepend_style) {
+            $attr['style'] = isset($attr['style']) ?
+                $prepend_style . $attr['style'] :
+                $prepend_style;
+        }
+        
+        $new_tag = $tag->copy();
+        $new_tag->name = $this->transform_to;
+        $new_tag->attr = $attr;
+        
+        return $new_tag;
+        
+    }
+}
+
+?>
\ No newline at end of file
diff --git a/library/HTMLPurifier/TagTransform/Simple.php b/library/HTMLPurifier/TagTransform/Simple.php
new file mode 100644
index 00000000..6ffd0eab
--- /dev/null
+++ b/library/HTMLPurifier/TagTransform/Simple.php
@@ -0,0 +1,26 @@
+<?php
+
+require_once 'HTMLPurifier/TagTransform.php';
+
+/**
+ * Simple transformation, just change tag name to something else.
+ */
+class HTMLPurifier_TagTransform_Simple extends HTMLPurifier_TagTransform
+{
+    
+    /**
+     * @param $transform_to Tag name to transform to.
+     */
+    function HTMLPurifier_TagTransform_Simple($transform_to) {
+        $this->transform_to = $transform_to;
+    }
+    
+    function transform($tag, $config, &$context) {
+        $new_tag = $tag->copy();
+        $new_tag->name = $this->transform_to;
+        return $new_tag;
+    }
+    
+}
+
+?>
\ No newline at end of file
diff --git a/tests/HTMLPurifier/TagTransformTest.php b/tests/HTMLPurifier/TagTransformTest.php
index f2cd18a3..760d85af 100644
--- a/tests/HTMLPurifier/TagTransformTest.php
+++ b/tests/HTMLPurifier/TagTransformTest.php
@@ -2,6 +2,11 @@
 
 require_once 'HTMLPurifier/TagTransform.php';
 
+// needs to be seperated into files
+require_once 'HTMLPurifier/TagTransform/Center.php';
+require_once 'HTMLPurifier/TagTransform/Font.php';
+require_once 'HTMLPurifier/TagTransform/Simple.php';
+
 class HTMLPurifier_TagTransformTest extends UnitTestCase
 {