Homepage: https://elpa.gnu.org/packages/psgml.html
Author: James Clark, Lennart Staflin
Updated:
SGML-editing mode with parsing support
Major mode for editing the SGML document-markup language. Send bugs to lenst@lysator.liu.se WHAT IT CAN DO - Identify structural errors (but it is not a validator) - Menus for inserting tags with only the contextually valid tags - Edit attribute values in separate window with information about types and defaults - Hide attributes - Fold elements - Indent according to element nesting depth - Show context - Structure editing: move and kill by element - Find next data context LIMITATIONS - only accepts the reference concrete syntax, though it does allow unlimited lengths on names