			Copyright © 1992, 1997 International Organization for Standardization. All rights reserved. This electronic document is for use during development and review of International Standards. Official printed copies of International Standards can be purchased from the ISO and the national standards organization of your country.
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4 Symbols and Abbreviations

The following abbreviations are used in this International Standard.

BOS: Bounded object set.
DTD: Document type definition.
FCS: Finite coordinate space.
GMT: Greenwich Mean Time.
HMU: HyTime measurement unit.
HyTime: Hypermedia/Time-based Structuring Language.
IOH: Integrated open hypermedia.
JD: Julian date.
LPD: Link process definition.
MDU: Measurement domain unit.
RHE: Reportable HyTime error.
SDIF: SGML Document Interchange Format.
SGML: Standard Generalized Markup Language.
SMU: Standard measurement unit.
SUBDOC: SGML subdocument entity.
UTC: Coordinated Universal Time.

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This electronic document is for use during development and review of International Standards. Official printed copies of International Standards can be purchased from the ISO and the national standards organization of your country.

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