Oxygen XML Editor Author allows you to set the value of the visibility property to -oxy-collapse-text, meaning that the text content of that element is not rendered. If an element is marked as -oxy-collapse-text you are not able to position the caret inside it and edit it. The purpose of -oxy-collapse-text is to make the text value of an element editable only through a form control.
title{
content: oxy_textfield(edit, '#text', columns, 40);
visibility:-oxy-collapse-text;
}