Significant Properties

Significant properties (sometimes called “significant characteristics”) are the essential qualities of a digital object that give it meaning and must survive format migration, emulation, or other preservation actions. They span content (the actual information), context (where it came from and how it relates to other records), structure (the arrangement of components), appearance (layout, color, fonts), and behavior (how interactive or dynamic elements function). Identifying them is a core appraisal and preservation decision: archivists decide what truly matters before they normalize or migrate a record, because no preservation action carries every byte forward unchanged.

For example, in a signed spreadsheet the live formulas and the audit of who approved it may be significant, while the exact on-screen font is not; in an email, the sender, date, and threading are significant, but the rendering engine is not. Documenting these properties supports authenticity claims and trustworthy repositories, and they are typically recorded as preservation metadata so future custodians know what each migration had to keep intact.