Custom attributes are the attributes that can be specified for any web site element.
Each attribute is a name-value pair. These attributes are intented to help developers to create customized and specialized templates without a need to rebuild Qixite when someone needs an additional attribute.
For example, a company building a directory of their products might want to include price. They can add an attribute "price" to a text section and then modify the template to display this attribute in some spcial color.
What it is not
Custom attributes do not magically appear on the template. The template has to be modified by a designer / XSL developer to support some specific attributes.