Hi, I have read several previous posts on this topic, but still have some questions. Previous topics: http://www.oxygenxml.com/forum/topic4909.html http://www.oxygenxml.com/forum/topic6949.html http://www.oxygenxml.com/forum/topic7103.html Using oXygen 14.1: I am able to write a custom StylesFilter that appropriately adjusts the colour highlighting of elements near processing instructions. I am also able to use the CSS form based editing (oxy_editor) to provide formatting and selection lists for elements. However, I have been unable to find a technique that allows the nodes between a <?oxy_custom_start?> and <?oxy_custom_end?> processing instruction to be accessed via CSS, rather than the AuthorPersistentHighlighter API. Is this possible? The problem with the element based approach is that this requires non-DITA (or other format specific doctype) elements to represent the additional information that we want to process. We would prefer to use processing instructions to contain this additional information, as this would not break the DITA validation. Ideally, we would like to be able to use the form based editing functionality with processing instructions (PIs), whilst the PIs are still hidden from view. Is it possible to 'link' a StyleFilter to the form based editing functionality through the API? Any suggestions welcome. Best regards. Anthony. -- -- ------------------------------------------------------------------------- Michael Anthony Smith, DeltaXML Ltd "Michael Anthony Smith, DeltaXML Ltd "Experts in Information Change"" T: +44 1684 869035 E: anthony.smith@deltaxml.com http://www.deltaxml.com Registered in England 02528681 Reg. Office: Monsell House, WR8 0QN, UK