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In metadata, the term data element is an atomic unit of data that has precise meaning or precise semantics. A data element has: An identification such as a data element name; A clear data element definition; One or more representation terms; Optional enumerated values Code (metadata)
Here is the definition of the "Person" Data Element in the Global Justice XML Data Model 3.0 *: person: Describes inherent and frequently associated characteristics of a person. Note that once again the definition is still circular. Person should not reference itself. The definition should use terms other than person to describe what a person is.
The third element is a value, preferably from some controlled vocabulary, some reference (master) data. The combination of the metadata and master data elements results in a statement which is a metacontent statement i.e. "metacontent = metadata + master data". All of these elements can be thought of as "vocabulary".
An important field in computer science, technology, and library science is the longevity of data. Scientific research generates huge amounts of data, especially in genomics and astronomy, but also in the medical sciences, e.g. in medical imaging.
ISO/IEC 11179 Standard describes the metadata and activities needed to manage data elements in a registry to create a common understanding of data across organizational elements and between organizations. ISO/IEC 19506 [41] Software Systems: ISO/IEC 19506 Standard called Knowledge Discovery Metamodel is an ontology for describing software ...
Overview of a data-modeling context: Data model is based on Data, Data relationship, Data semantic and Data constraint. A data model provides the details of information to be stored, and is of primary use when the final product is the generation of computer software code for an application or the preparation of a functional specification to aid a computer software make-or-buy decision.
The user, rather than the database itself, typically initiates data curation and maintains metadata. [8] According to the University of Illinois' Graduate School of Library and Information Science, "Data curation is the active and on-going management of data through its lifecycle of interest and usefulness to scholarship, science, and education; curation activities enable data discovery and ...
A data steward ensures that each assigned data element: Has clear and unambiguous data element definition; Does not conflict with other data elements in the metadata registry (removes duplicates, overlap etc.) Has clear enumerated value definitions if it is of type Code; Is still being used (remove unused data elements)