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What short name does OAIS use for an information package that is used for archiving?
ALTO (Analyzed Layout and Text Object) is a XML Schema that details technical metadata for describing the layout and content of physical text resources, such as pages of a book or a newspaper. It most commonly serves as an extension schema [https://www.loc.gov/standards/alto/techcenter/use-with-mets.html used with METS]. However, ALTO instances can also exist as a standalone document used independently of METS.
Each ALTO file contains a style section where different styles (for paragraphs and fonts) are listed. The layout section contains what’s on the page. A page is divided into several regions (Print space, left margin, right margin, top margin and bottom margin). For each region all objects are listed which have been detected inside.
More information at [https://www.loc.gov/standards/alto/ the official ALTO website] and [https://github.com/altoxml the official ALTO Github website].