General International Standard Archival Description ISAD(G)

Descriptive Featured

Standard for describing archival materials at all levels.

Description

ISAD(G), the General International Standard Archival Description, is an international standard approved by the International Council on Archives (ICA) for describing archival materials created by corporations, persons, and families. First released in 1994 and revised as a second edition in 2000, the standard defines a list of elements and rules for the description of archives and establishes what information should be included at different organizational levels. The framework employs a hierarchical multi-level description model beginning with broad fonds-level documentation and proceeding through increasingly detailed levels such as subfonds, series, files, and individual items.

ISAD(G) comprises 26 data elements divided into seven functional areas, with six elements designated as essential for basic archival identification and discovery. The standard operates according to four core principles: maintaining multilevel hierarchical structure, ensuring information relevance to each descriptive level, linking descriptions within the hierarchy, and avoiding unnecessary repetition of information across levels. It functions as a complementary protocol alongside related standards including ISAAR(CPF) for authority records and can be implemented within technical frameworks such as Encoded Archival Description (EAD) and Dublin Core metadata structures.
Heratio Extensions 3
Addition Security Classification

Adds security clearance levels (Unclassified through Top Secret) and embargo dates to archival descriptions, with ACL enforcement per user clearance level.

ahgSecurityClearancePlugin security_clearance,security_clearance_i18n
NARSSA and government archives require classification-based access control not covered by ISAD(G).
Addition Custom Metadata Fields (EAV)

Admin-configurable custom fields per entity type without code changes. Supports text, textarea, date, number, boolean, dropdown, url field types.

ahgCustomFieldsPlugin custom_field_definition,custom_field_value
Institutions need institution-specific metadata fields beyond ISAD(G)'s fixed element set.
Addition GLAM Sector Display Modes

Automatic detection and sector-specific display of archival descriptions (Archive, Library, Museum, Gallery, DAM) with faceted browse.

ahgDisplayPlugin display_object_config,display_facet_cache
AtoM only serves archives. Heratio extends to all GLAM/DAM sectors with appropriate display conventions.