ISO/IEC 8859-7:2003

Overview

ISO/IEC 8859-7:2003 - "Information technology - 8‑bit single‑byte coded graphic character sets - Part 7: Latin/Greek alphabet" defines an 8‑bit single‑byte character set for Latin and Greek script use. The standard specifies a set of 188 coded graphic characters intended for use in data and text processing and for information interchange in typical office environments. Character names and identifiers are taken from ISO/IEC 10646 (Unicode) and the code table includes explicit U+ mappings.

Keywords: ISO/IEC 8859-7, Latin/Greek, 8-bit encoding, character set, Greek encoding, legacy encoding.

Key topics and technical requirements

• Character repertoire: 188 graphic characters (non‑combining) covering Latin and Greek letters, digits, punctuation and common symbols. Code positions and U+ identifiers are provided in the standard’s code table.
• 8‑bit single‑byte structure: Characters are encoded as single bytes in a 256‑position table (16×16 layout). Notation uses hh/kk or hexadecimal hk positions.
• Conformance rules: Definitions for CC‑data‑elements and device conformance (device description, originating and receiving device behavior) to ensure interoperable interchange.
• Compatibility model: The set may be regarded as an 8‑bit code according to ISO/IEC 2022 or ISO/IEC 4873 at level 1. It is not to be used directly together with other ISO/IEC 8859 parts; multi‑part usage requires ISO/IEC 10367 equivalents or ISO/IEC 4873 at level 2/3.
• Control functions: Can be used with coded control functions from ISO/IEC 6429, but control functions must not be used to create composite graphic symbols.
• Reference mapping: Character names/identifiers align with ISO/IEC 10646‑1 (Unicode), facilitating mapping and conversion.

Applications and who uses it

ISO/IEC 8859-7 is primarily relevant to:

• Software developers and localization engineers working with legacy data or systems that use single‑byte Greek/Latin encodings.
• System integrators and device manufacturers implementing text input/output, printers, terminals, or embedded devices constrained to 8‑bit encodings.
• Archivists and migration teams converting legacy documents to Unicode (mapping table eases conversion).
• Font designers and typesetting tools that support legacy character code positions.

Practical uses include office document interchange, mail systems, legacy databases, firmware or embedded displays where Unicode is not available.

Related standards

• ISO/IEC 10646 / Unicode - character names and code point mappings.
• ISO/IEC 2022 and ISO/IEC 4873 - code structure and extension techniques (compatibility/levels).
• ISO/IEC 6429 - coded control functions.
• ISO/IEC 10367 and the ISO International Register of Coded Character Sets - for multi‑part code extension and G1 set usage.

Using ISO/IEC 8859-7 is a practical choice when interoperating with legacy Greek/Latin data or when constrained to 8‑bit single‑byte environments; for modern systems, Unicode is recommended with mappings provided by this standard to simplify migration.