At times you may need to further extend the functionality of the edited source feature by introducing XSL templates containing a complete set of formatting requests, none of which can be fulfilled by existing Arbortext Styler window functionality. In this instance you must introduce the code to the Arbortext Styler window in such a way that Arbortext Styler window recognizes the code as edited source, even if the code bears no relation to any existing element in the document. To accomplish this, create a random User Formatting Element (UFE) that will hold the templates - the templates can then be referenced by other elements when their formatting is required.

The general process to create the new UFE is defined below, although a specific example is included at the end of the section for reference, including instructions on how to associate your new template with an existing element:

For example: your current doctype includes an empty fill-in-the-blank element, which contains an optional blanksize attribute whose value is an unsigned and limitless number. The presence of the blanksize attribute will output a baseline rule whose length in inches is either the value of the attribute, or 1 if the attribute does not have a value. It is not possible to format the baseline in this way in the Arbortext Styler window, although XSL-FO provides this formatting capability. In this instance, you must create a separate XSLT template named, for example, blanksize-to-leader-length, which will perform the baseline length computation. The steps are defined below: