Avoid obscure, dependent, or closed technologies that are harder to support due to the opaqueness of the underlying code, third-party dependencies that may be required for the tool to run, and limited preservation experience with the tool itself. Keep in mind, however, that open tools that are rarely used may be less stable than common proprietary tools that are widely adopted and have more community support.

These guidelines also refer to the use of open formats and technologies:
3. Use existing standards to guide design decisions on publishing platforms
11. Use non-proprietary, broadly supported and adopted open file formats
29. Consider a preservation-specific EPUB in your workflow
51. When embedding video and other media in web-based publications, host the media files local to the website using standard HTML