I would argue, then, that determining what constitutes informational content is best done subjectively. It should be based on an assessment of the attributes of the document rather than the process used to create that document. Reformatting via
digital-or analog-techniques presumes that the essential meaning of an original can somehow be captured and presented in another format. There is always some loss of information when an object is copied. The key is to determine whether that informational loss is significant. Obviously for some items, particularly those of intrinsic value, a copy can serve only as a surrogate, not as a replacement. This determination should be made by those with curatorial responsibility and a good understanding of the nature and significance of the material. Those with a trained eye should consider the attributes of the document itself as well as the immediate and potential uses that researchers will make of its informational content.