Significant characteristics of presentation files
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Main Page > Documentation > Media type preservation plans > Significant characteristics > Significant characteristics of presentation files
- Research on the significant properties of presentation files is not readily available. As a general rule, however, it is reasonable to assume that content, page layout and design and the presence of embedded images, graphs, charts and other objects should be considered significant. Other features such as animation and slide transitions may be less significant, depending on the content and context of the record.
- Since the significant properties of presentation files are similar to those of word processing documents, the following has been taken from Significant properties of word processing files:
- "[T]he essential characteristics of a word processing document may include the textual content; formatting such as bolded text, font type and size; layout; bulleting; colour and embedded graphics." An Approach to the Preservation of Digital Records, National Archives of Australia, 2002
- Document Metadata: Document Technical Metadata for Digital Preservation, Florida Digital Archive and Harvard University Library, 2009: this resource suggests technical metadata for documents which "can be used to verify the result of document transformations, ensuring the properties of the original document are preserved and properly transformed to the new document format." The metadata in this table are adapted from that source:
| Semantic unit | Description | Obligation | Characteristic | Note |
|---|---|---|---|---|
| PageCount | Total number of pages in the document | Mandatory | Structure | |
| WordCount | Total number of words in the document | Optional | Structure | This element is included in this schema because it can be valuable for evaluating the completeness of the content after transformations. Caution must be used with this element, however, because tools and applications that can determine the number of words in a document do not always use the same algorithm for determining this value. |
| CharacterCount | Total number of characters in the document | Optional | Structure | See note for WordCount, above |
| ParagraphCount | Total number of paragraphs in the document | Optional | Structure | See note for WordCount, above |
| LineCount | Total number of lines in the document | Optional | Structure | See note for WordCount, above |
| TableCount | Total number of tables in the document | Optional | Structure | See note for WordCount, above |
| GraphicsCount | Total number of graphics in the document | Optional | Structure | See note for WordCount, above |
| Language | A language identifier specifying the natural language used in the document | Optional | Content | |
| Fonts (FontName, isEmbedded) | A list of fonts used in the document; An indication of whether or not a font is embedded in a document | Mandatory | Content, Appearance | This element allows a repository to store the names of all fonts used in a document. Some repositories may choose to store only the non-embedded fonts. It is recommended that repositories record at least the non-embedded fonts to assist in identifying the documents with potential long-term preservation risks. |