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These recommendations are designed to serve as a general guideline for
file formats within the Archives and Special Collections. The Archives
will accept all file formats; however, some formats are more sustainable
and easier to preserve long term. The Archives ranks formats based on
how comfortable we are with maintaining each format. These rankings are
High, Moderate and Low.
indicates that the formats have the most support and the highest
probability of long-term stability. The formats are typically openly
documented and are not compressed (or have lossless data compression).
formats do not meet the minimum requirements for long-term retention but
come close and for practical reasons, may be necessary for long-term
care. These formats are more likely to require migration in order to
Low Preference formats are not recommended or
supported for long-term preservation. These files may be difficult to
render or provide access to in the future.