Editing Perseus Digital Library (section)

=== Sustainability ===
Perseus has proven convincing in terms of sustainability throughout its long history{{R|Lang}} and ability to evolve, having notably been able to migrate from the [[SGML]] format to XML in Perseus 4.0.{{R|Preece-Zepeda}} The preservation of the collections is further insured by a [[Fedora Commons]] Backend created in 2002{{R|"Minds Alive"}}{{R|Preece-Zepeda}} as well as a [[mirror site]] provided by the University of Chicago.{{R|Lang}}
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