The prototyping project plans to use the generic descriptive metadata extension schema gdm.xsd developed at the University of California at Berkeley. Some of the specific audio-visual extension schemas are placeholders awaiting development from other organizations. For example, the extension schema for image technical information is intended to embrace the elements and attributes expressed by the data dictionary for the NISO image metadata set. When the official NISO image metadata schema is ready, it will supplant our placeholder. We emphasize the tentative nature of some of these extension schemas; the video extension schema, for example, awaits improvement by video engineering specialists.
Primary Schema | Extension schema and comment | |||
<mets> | ||||
<dmdSec>
Descriptive Metadata Section |
Examples: gdm.xsd from Cal Berkeley or schemas based on MARC or Dublin Core | |||
<amdSec>
Administrative Metadata Section |
<techMD> | allFilesMD.xsd | information common to all files, e.g., size, date created, Internet media type | |
audioMD.xsd | additional information specific to audio files, e.g., sampling frequency | |||
imageMD.xsd | additional information specific to image files, e.g., bits per pixel, color space | |||
textMD.xsd | additional information specific to text files, e.g., character set, encoding used | |||
videoMD.xsd | additional information specific to video files, e.g., bit rate, compression codec | |||
<rightsMD> | rightsMD.xsd | rights, restrictions, and/or other information that can be used to support access management systems; LC application focus on access management support only | ||
<sourceMD> | sourceMD.xsd | information common to all items that have been reformatted or migrated, e.g., identifier, type, dimensions | ||
audioSourceMD.xsd | additional information specific to audio items to be digitized or presented for file-format migration, e.g., type of groove (disc), channel or track specifications, sampling frequency (digital source) | |||
imageSourceMD.xsd | additional information specific to items scanned to produce images or [coming in next iteration] presented for file- format migration, e.g., condition, composition (type of material) | |||
textSourceMD.xsd | additional information specific to text files presented for file-format migration, e.g., character set, encoding used | |||
videoSourceMD.xsd | additional information specific to video items to be digitized or presented for file-format migration, e.g., tape stock information, video format information, bit rate (digital source) | |||
<digiProvMD> | digiProvMD.xsd |
about the events/steps/processes that occurred in reformatting or migrating entities | ||
<fileGrp> File Groups Section |
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<structMap> Structural Map Section |
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</mets> |