Before you edit an already released layout you should create a copy of the layout that you can revert to if the edited layout does not function according to your wishes after release. This security precaution is unnecessary if archiving is switched on in your Content Management Server.
You can create and edit layouts in the same manner as folders or documents. Links to
other files in layouts are also not handled differently than links in folders or
documents. Unlike files of these two types, however, the CMS always uses the entire main
content of a layout file and not just the HTML code in the body element.
The Content Management Server and the Template Engine support so called empty-element tags in accordance with the XML specification. Such tags are empty elements at the same time. They are tags ending with a slash and the end-of-tag-character:
<empty-element-tag />
They are equivalent to elements with an opening and a closing tag and no content, i.e.:
<element-tag></element-tag>
Empty-element tags are preserved upon export. This means that the Content Manager and the Template Engine do not convert them to elements with an opening and a closing tag.