The first major factor affecting the approach to the preservation of digital items is the type of material (Figure 3). For example, textual documents are possibly the simplest items to preserve, they are well-scoped, containing all the information relating to document within the file, when it is presented for preservation. Complexity remains low if they use a standard mark-up language. The complexity rating rises when a document links to other objects, outside itself, or when essential extra functionality for document formatting (Table of Contents) is introduced, or the document contains a macro, or the document is intended to work in a networked environment and contains HTML linkages. The risk is that some of these features may not be reproducible, or inaccurately, in the future. Either way the evidential nature of the record is diminished, potentially catastrophically. At present, when such documents are retrieved, these functions are usually lost, and the unformatted text is displayed or “default” templates are used. The loss is restricted to formatting and presentation.