TdxDocumentModelChangeType = (
    None,
    InsertParagraph,
    InsertText,
    InsertInlinePicture,
    InsertInlineCustomObject,
    InsertFloatingObjectAnchor,
    InsertSection,
    ModifySection,
    CreateEmptyDocument,
    LoadNewDocument,
    DeleteContent,
    JoinRun,
    SplitRun,
    ToggleFieldCodes,
    ToggleFieldLocked,
    Fields
);