Db Metadata
Summary
Archival Metadata
With all the different hardware that has existed over the years, how do we make sure we can still access our data?
Preservation Metadata and the OAIS Information Model
Open Archival Information System
Submission Information Package (SIP) := the information that is submitted with the data that is going to be archived at the point in time where the archiver receives this information.
Archival Information Package (AIP) := the information package that is used by the archive, during the period of time when the data is in the archive.
Dissemination Information Package (DIP) := the metadata package that is used as portions of the information in the archive is shared with others.
Content Information
Content Data Object (CDO) is the bitstream that is being preserved.
Representational Information (RI):
- Metadata that translates the bit stream(s) of the CDO into accessible, meaningful knowledge
- Structural
- The format, data structures that makes the stream(s) into characters, numbers, pixels, arrays, tables, encoding, (Computer Oriented)
- Semantics
- The meaning, English Prose, temperature measurements, etc (Human Oriented)
Content Data Object Description (CDO):
- Human readable data structure description
- Structural type
- Class of objects
- image, sound, text, db, web doc, executable, etc.
- Infrastructure of complex object
- Class of objects
- File description
- Formats used to access and render the object
- Installation Requirement
- Size
- Access inhibitors
- encrypt, watermarks
- Access facilitators
- time markers, links
- Significant Properties
- color, layout, links, “look and feel”
- Functionality
- e.g. embedded animation
- Description of rendered contents
- Documentation
Preservation Description Information
Standards
Standards for archival metadata are not mature
- ISO/IEC 11179 Specification and Standardization of Data Elements
- OAIS
- OASIS Repository (for XML schema)
Representation Standards
Representation are not mature either:
- XML
- XML Schema
- OWL
- RDF
- Dublin Core
- XML METS
- VERS
- AIP
- MOF
Registry
Several elements are necessary to be successful in the creation and evolution of a metadata registry
- initial creation of metadata schemata
- subsequent creation of new metadata schemata must be a controlled process
- a process must be developed for the long-term controlled evolution, maintenance, and use of metadata schemata
- Obviously, tools must be in place to support the development and evolution of and control of the metadata registry