n.a set of options that govern the content of a metadata elementMiller 2011, 11A typical syntax encoding scheme is the W3C Date and Time Format that specifies a consistent format for recording dates. Syntax encoding schemes are a form of data value standard and may be distinguished from vocabulary encoding schemes. See also Encoding scheme; Value standard; Vocabulary encoding scheme.Fairbairn, Pimpinelli, and Ross 2016, 44Provide access to the Work by means of subjects (or subject identifiers) that describe the content of the Work (i.e., what the Work is about). Use an existing data value standard such as Library of Congress Subject Headings (LCSH). Alternatively, or additionally, use standards such as Universal Decimal Classification (UDC), Dewey Decimal Classification (DDC), or equivalent in country in which you are working, or an in-house data value standard.Gilliland 2016Data value standards (controlled vocabularies, thesauri, controlled lists). These are the terms, names, and other values that are used to populate data structure standards or metadata element sets. Library of Congress Subject Headings, Name Authority File, and Thesaurus for Graphic Materials; Getty Art & Architecture Thesaurus, Union List of Artist Names (ULAN), and Thesaurus of Geographic Names; ICONCLASS; Medical Subject Headings.CDL 2020bData value standards govern the choice and form of controlled forms of data values within metadata elements. These controlled data values are often found in the form of thesauri, vocabulary lists, and authority files. Examples include the Library of Congress’ Subject Cataloging Manual (SCM) and the Art & Architecture Thesaurus (AAT) rules.
Data value standard is not a synonym for controlled vocabulary. Controlled vocabularies and thesauri are data value standards when used by archivists in structured metadata contexts. However, controlled vocabularies and thesauri can be put to other uses, and data value standards may take other forms, such as classification schemes. Examples of data value standards include the Library of Congress Name Authority File, the Library of Congress Subject Cataloging Manual, the Art and Architecture Thesaurus, and ICONCLASS.