Hi group The cc_config.xml file seems to be handy to apply DITA constraints (although I could imagine easier ways, such as some kind of wizard, for example). I see that it is possible to "reject" elements and attributes: https://www.oxygenxml.com/doc/versions/18/ug-editor/topics/configure-element... But is it also possible to reject attribute *values (without having to create a DITA specialization*? For example, suppose I want to restrict the list of the @type attribute for the [note] element. I only want to see the values: warning, caution, tip and notice and "hide" the others (fastpath, restriction, danger, important...) Is there an easy way to do this? I think it would be nice if we could have some kind of wizard which presents us a list of DITA elements and attributes (and their values) where we would just select the elements, attributes and attribute values we need (using check boxes to select or deselect). And we also need to be able to show or hide complete domains, similar to what is described in the DITA Style Guide: https://www.oxygenxml.com/dita/styleguide/webhelp-feedback/#Artefact/Documen... (A bit weird to see a screen shot from a wizard in XMetaL published in the DITA STyle Guide on the oxygenxml website ;-)). Thanks Yves