EDOCS-CCITT-T-411

Legacy CCITT T.411 standard for structured documents.

Definition

ODA distinguishes Logical Structure (chapters, sections), Layout Structure (pages, blocks), Content Layers (text, raster, geometric). ASN.1 BER binary format. Limited production adoption but major influence on structured HTML/XML/PDF. Today obsolete.

Origin

Published by CCITT in 1988 ; renamed ITU-T T.411 in 1993.

Example in context

ODA documents archived in 1990s European banks are migrated to PDF/A.

Related terms

• ISO 32000 PDF — conceptual successor.