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G. Harvey-s text buffer module, which is announced in the preliminary project list, lacks stuff like markers, text properties, undo, ... Is it possible to add those on scheme levele.g. using some object system , taking a <tbuf> class, and deriving <tbuf-with-mark> etc. from it? Or would that annihilate on site all the performance advantage that tbuffers give over large strings when it comes to frequent insertion/deletion? Also, what are the main objections to implementing buffers as port objects? -- Klaus Schilling