ISO IEC 8211-1994 PDF

Full title and description

ISO/IEC 8211:1994 — Information technology — Specification for a data descriptive file for information interchange. The standard defines a media‑independent file and record structure (a Data Descriptive File, DDF) and the associated descriptive record used to carry metadata that permits decoding and interchange of data records between computer systems.

Abstract

Specifies an interchange format to facilitate moving files or parts of files containing data records between computer systems. Defines the Data Descriptive Record (DDR) and companion data records, a directory and field areas, and supports three interchange levels (simple character fields, structured fields with multiple data types, and hierarchical structures). Intended to be media independent so any storage or transmission medium may be used for physical interchange.

General information

• Status: Published (edition 2, confirmed in 2000).
• Publication date: 29 September 1994 (Edition 2, 1994).
• Publisher: Joint ISO/IEC publication (International Organization for Standardization in cooperation with the International Electrotechnical Commission / JTC 1).
• ICS / categories: 35.080 (Information processing / data interchange).
• Edition / version: Edition 2 (1994).
• Number of pages: 69.

Scope

Defines a generic, system‑independent serialization and descriptive mechanism for data interchange: the composition of a Data Descriptive File (DDF) made up of logical records, each with a Leader, Directory and Field Area, and a Data Descriptive Record that documents the structure and formats used in companion data records. The standard supports multiple data representations (character strings, bit strings, integer, real, floating point and binary encodings) and three levels of complexity so users can select a level matching their data model. Designed so all information necessary to recreate the structure on the receiving system is contained within the interchange.

Key topics and requirements

• Definition of the Data Descriptive File (DDF) architecture: Leader, Directory, Field Area and Data Descriptive Record (DDR).
• Support for elementary data, vectors, arrays and hierarchical structures across three interchange levels.
• Media independence — format must be usable across wires, tapes, disks or other media.
• Self‑documentation: DDR carries the metadata needed to decode companion data records.
• Flexible numeric and character representations (integers, reals, binary encodings, character strings, bit strings).
• Application responsibility: the standard specifies the serialization mechanism but requires application‑level specifications to define semantic details of fields for particular domains.

Typical use and users

Used where structured datasets need a portable, self‑describing interchange representation. Common users include geospatial data producers and consumers, mapping/hydrographic agencies and other organizations exchanging complex record‑based datasets; the format has been used by geospatial transfer standards (for example SDTS) and by domain applications that require explicit field descriptions embedded with the data. Software libraries and GIS/ETL tools sometimes provide readers/writers for ISO/IEC 8211.

Related standards

ISO/IEC 8211:1994 superseded ISO 8211:1985 (withdrawn). The record structure and nomenclature are historically related to ISO 2709 (the MARC-style record structure) but ISO/IEC 8211 extends support for richer numeric encodings and hierarchical constructs. It has been referenced by and used within geospatial transfer specifications such as SDTS and appears in technical references for GIS and hydrographic product specifications.

Keywords

ISO 8211, ISO/IEC 8211:1994, Data Descriptive File, DDF, data interchange, serialization, DDR, directory/leader/field area, geospatial data, SDTS, ISO 2709.

FAQ

Q: What is this standard?

A: ISO/IEC 8211:1994 is an international standard specifying a Data Descriptive File (DDF) format and the Data Descriptive Record used to describe and carry the metadata necessary to interchange record‑based datasets between computer systems.

Q: What does it cover?

A: It covers the file and record layout (Leader, Directory, Field Area), the structure and encoding of data fields (including numeric and character representations), three interchange complexity levels, and rules so the receiving system can reconstruct the data structures without external documentation. It does not define application semantics for individual domains — those are provided by application profiles.

Q: Who typically uses it?

A: Producers and consumers of structured datasets who need a portable, self‑describing interchange format — notably organizations in the geospatial and mapping community, data archives and any system exchanging record‑based collections where embedded field descriptions are required.

Q: Is it current or superseded?

A: ISO/IEC 8211:1994 is the second edition (1994) and, per ISO records, was reviewed and confirmed in 2000; the edition remains published (not withdrawn) in ISO’s catalogue. Earlier ISO 8211:1985 was withdrawn and replaced by the 1994 edition. Users should check national/regional catalogues or ISO for any later revisions if up‑to‑date confirmation is required.

Q: Is it part of a series?

A: It is a standalone ISO/IEC JTC 1 standard for data interchange (ICS 35.080). While not part of a numbered “series,” it is related by concept and historical lineage to other bibliographic/record standards (ISO 2709) and is referenced by domain standards (for example SDTS and certain geospatial/hydrographic product specifications).

Q: What are the key keywords?

A: Data Descriptive File (DDF), DDR, serialization, data interchange, ISO 8211, record structure, directory, leader, field area, geospatial transfer.