support for specifying editable presentations of documents
support for specifying computations
Proxima is a presentation-oriented editor: the user can edit the visual document presentation directly (WYSIWYG).
Proxima is an editor for structured documents: it understands the document structure and also supports structural edits. Proxima will eventually support the proposed recommendations for XLL (XLink + XPointer) and XPath, and implement the standards CSS and XSLT for specifying presentations and computations.