EN 12381:2005

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Explicit semantic labelling of predicational components
  4.1 General
  4.2 Labelling of propositional clauses
  4.3 Labelling of temporal expressions:
  4.4 Labelling of Basic temporal links
      4.4.1 General
      4.4.2 "has-occurrence"
      4.4.3 "has-rate"
      4.4.4 "has-frequency"
      4.4.5 "has-duration"
  4.5 Labelling of complex temporal links
  4.6 Temporal comparators
      4.6.1 General
      4.6.2 Temporal comparators in combination with events
      4.6.3 Temporal comparators in combination with episodes
5 Characteristics of conformance
  5.1 Provisions for conformance specification
  5.2 Basic guidelines
  5.3 LSS: Level of semantic specification
      5.3.1 LSS(0)
      5.3.2 LSS(1)
      5.3.3 LSS(3)
  5.4 LRE: level of recursive embedding of time-related
      information
      5.4.1 LRE(0)
      5.4.2 LRE(1)
      5.4.3 LRE(2)
  5.5 LDR: level of deictic referential complexity
      5.5.1 LDR(0)
      5.5.2 LDR(1)
  5.6 LDC: level of relative deictic referential complexity
      5.6.1 LDC(0)
      5.6.2 LDC(1)
      5.6.3 LDC(2)
  5.7 LQI: level of formal rigour of temporal expressions
      5.7.1 LQI(0)
      5.7.2 LQI(1)
      5.7.3 LQI(2)
Annex A (informative) BNF description of the syntax used in
                      the standard predications of this
                      document
Bibliography

This document specifies a set of representational primitives and semantic relations required for an unambiguous representation of explicit time-related expressions in health informatics. This document does not introduce or force a specific ontology of time, nor does it force the use of a fixed representation scheme for such an ontology. Rather this document provides a set of principles for syntactic and semantic representation that allow the comparability of specific ontologies on time, and the exchange of time-related information that is expressed explicitly. This document is applicable to:1)developers of medical information systems in which the need is felt to have explicit time-related concepts for internal organization (e.g. temporal data bases, temporal reasoning systems);2)information modellers or knowledge engineers building models for the systems mentioned in (1);3)experts involved in the development of semantic standards on precise subdomains in health care where time-related information need to be covered, (e.g. in the study of Pathochronology, i.e. the discipline dealing with the time course of specific diseases);4)developers of interchange formats for messages in which time-related information is embedded.This document is not intended to be used directly for:1)representing what is true in time;2)reasoning about time;3)representation of metrological time (which is covered in other standards).