diff --git a/CodeCorner3.md b/CodeCorner3.md
index b635404..fa3d0a2 100644
--- a/CodeCorner3.md
+++ b/CodeCorner3.md
@@ -8,10 +8,9 @@ on day three we went out of base camp eGroupware and stepped into the high field
- splitting design and layout
- there is no EGroupware specific dialog-editor (one part of the etemplate-app) to create the eTemplate but a EGroupware specific DTD. So any XML-Capable Editor will do.
-- <!DOCTYPE overlay PUBLIC "-//Stylite AG//eTemplate 2//EN" "http://www.egroupware.org/etemplate2.dtd">
+- Documenttypedefinition (DTD): <!DOCTYPE overlay PUBLIC "-//Stylite AG//eTemplate 2//EN" "http://www.egroupware.org/etemplate2.dtd"> Always add that to your .xet files
- XSS security
- no parsing of $_POST needed
- - no HTML knowledge needed
- eTemplates can be (and are usually) nested, eg. a template-field can contain an other eTemplate
- language independent interfacing: each field / cell of the template can have a label which is automaticaly run through lang() (the content of the field can be run through lang() too)