Overview
ISO 6862:1996 specifies a standardized mathematical coded character set for bibliographic information interchange. It defines a set of 188 graphic characters (presented as code tables and a legend) intended to enable reliable transmission of mathematical symbols within bibliographic records and their annotations. The standard covers the coded representations, names/meanings, and explanatory notes - it is focused on transmission and interchange, not on how symbols are used in source documents or typesetting.
Key Topics and requirements
- Character repertoire: A defined collection of 188 mathematical graphic characters provided in two code tables (basic set and extension) plus a legend describing each symbol’s name/meaning.
- Legend and coding: A legend (table 3) maps each graphic to a name/meaning and comments (including overlay/non‑spacing overlay characters for constructing modified symbols).
- Transmission rules: The character set is implemented in accordance with ISO 2022 (character code structure and extension techniques) and identified by registered escape sequences; registration procedures follow ISO 2375.
- Interoperability constraints: Unassigned code positions must not be used in international exchange of bibliographic information. Characters are assigned based on shape (not only meaning), and some symbols already present in other established character sets are not duplicated except where necessary.
- Extensibility: Non‑spacing overlay characters allow composition (negation bars, dots, arrows, etc.) to create modified or negative forms without defining separate code points for every variant.
- Informative annex: Annex A references implementation topics (physical media, error checking, related standards) and is provided for guidance.
Applications
ISO 6862 is intended for systems that exchange bibliographic records containing mathematical notation, including:
- Library systems and bibliographic databases (catalogues, MARC-like metadata flows)
- Digital repositories and scholarly metadata services
- Library and information science software vendors implementing interchange formats
- Archivists and metadata specialists who require consistent encoding of mathematical symbols in bibliographic annotations
- Standards bodies and implementers mapping character sets for interoperability
Using ISO 6862 helps ensure accurate, interoperable transmission of mathematical symbols across systems and media, reducing ambiguity when exchanging bibliographic metadata that include equations, operators, and specialized math notation.
Related standards
- ISO 2022 - Character code structure and extension techniques
- ISO 2375 - Registration procedure for escape sequences
- ISO 646 - International reference 7‑bit coded character set
- ISO 5426 / ISO 5428 - Extensions for Latin and Greek alphabets for bibliographic interchange
- ISO 31‑11 - Quantities and units (naming conventions referenced)
Keywords: ISO 6862, mathematical coded character set, bibliographic information interchange, character set, ISO 2022, ISO 2375, bibliographic records, coded characters, interoperability.