A file with .usd extension is a universal scene description file format that encodes data for the purpose of data interchanging and augmenting between digital content creation applications.
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A DAE file is a digital asset exchange file format that is used for exchanging data between interactive 3D applications. This file format is based on the COLLADA (COLLAborative Design Activity) XML schema which is an open standard XML schema for the exchange of digital assets among graphics software applications. It has been adopted by ISO as a publicly available specification, ISO/pAS 17506.
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