diff --git a/library/smarty/libs/sysplugins/smarty_internal_parsetree_tag.php b/library/smarty/libs/sysplugins/smarty_internal_parsetree_tag.php
new file mode 100644
--- /dev/null
+++ b/library/smarty/libs/sysplugins/smarty_internal_parsetree_tag.php
@@ -0,0 +1,62 @@
+<?php
+/**
+ * Smarty Internal Plugin Templateparser Parse Tree
+ * These are classes to build parse tree in the template parser
+ *
+ * @package    Smarty
+ * @subpackage Compiler
+ * @author     Thue Kristensen
+ * @author     Uwe Tews
+ */
+
+/**
+ * A complete smarty tag.
+ *
+ * @package    Smarty
+ * @subpackage Compiler
+ * @ignore
+ */
+class Smarty_Internal_ParseTree_Tag extends Smarty_Internal_ParseTree {
+
+    /**
+     * Saved block nesting level
+     *
+     * @var int
+     */
+    public $saved_block_nesting;
+
+    /**
+     * Create parse tree buffer for Smarty tag
+     *
+     * @param object $parser parser object
+     * @param string $data content
+     */
+    public function __construct($parser, $data) {
+        $this->parser = $parser;
+        $this->data = $data;
+        $this->saved_block_nesting = $parser->block_nesting_level;
+    }
+
+    /**
+     * Return buffer content
+     *
+     * @return string content
+     */
+    public function to_smarty_php() {
+        return $this->data;
+    }
+
+    /**
+     * Return complied code that loads the evaluated output of buffer content into a temporary variable
+     *
+     * @return string template code
+     */
+    public function assign_to_var() {
+        $var = sprintf('$_tmp%d', ++Smarty_Internal_Templateparser::$prefix_number);
+        $tmp = $this->parser->compiler->appendCode('<?php ob_start();?>', $this->data);
+        $tmp = $this->parser->compiler->appendCode($tmp, "<?php {$var}=ob_get_clean();?>");
+        $this->parser->compiler->prefix_code[] = sprintf("%s", $tmp);
+
+        return $var;
+    }
+}