> An in-memory data model often differs from the serialized data as it exists on disk. For example, emacs uses a gap buffer for text files; but it outputs plain

> An in-memory data model often differs from the serialized data as it exists on disk. For example, emacs uses a gap buffer for text files; but it outputs plain linear text to disk. The whole point of my remark is that the domain model and the export document format are two entirely separate things.