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ADDML
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<p>Archival Data Description Mark-up Language (ADDML) is a <a href="/facts/Technical_standard/P4orT1SM">standard</a> describing a collection of <a href="/facts/Data_file/S9oFvf2z">data files</a>. The standard was originally developed by the <a href="/facts/National_Archives_of_Norway/LHXoqUxc">National Archives of Norway</a> (NAN), and existed in several different versions until a constant form was reached with 8.2, the present <a href="/facts/De_facto/3Du6WQKh">de facto</a> standard. </p>