semantic gap - definition. What is semantic gap
Diclib.com
قاموس على الإنترنت

%ما هو (من)٪ 1 - تعريف

DIFFERENCE BETWEEN TWO DESCRIPTIONS OF AN OBJECT BY DIFFERENT LINGUISTIC REPRESENTATIONS
  • 400x400px

semantic gap         
The difference between the complex operations performed by high-level language constructs and the simple ones provided by computer instruction sets. It was in an attempt to try to close this gap that computer architects designed increasingly complex instruction set computers. (1994-10-10)
Semantic gap         
The semantic gap characterizes the difference between two descriptions of an object by different linguistic representations, for instance languages or symbols. According to Andreas Hein, the semantic gap can be defined as "the difference in meaning between constructs formed within different representation systems".
Semantic change         
FORM OF LANGUAGE CHANGE REGARDING THE EVOLUTION OF WORD USAGE
Semantic progression; Semantic drift; Semantic shift; User:Sonic Mew/Amelioration; Semantic Change; Amelioration (semantic); Ameliorative; Pejorative change; Specialization of meaning; Generalization of meaning; Cohyponymic transfer; Auto-converse; Semantic development; Desemanticized; Amelioration (linguistics); Narrowing (historical linguistics); Narrowing (diachronic linguistics)
Semantic change (also semantic shift, semantic progression, semantic development, or semantic drift) is a form of language change regarding the evolution of word usage—usually to the point that the modern meaning is radically different from the original usage. In diachronic (or historical) linguistics, semantic change is a change in one of the meanings of a word.

ويكيبيديا

Semantic gap

The semantic gap characterizes the difference between two descriptions of an object by different linguistic representations, for instance languages or symbols. According to Andreas M. Hein, the semantic gap can be defined as "the difference in meaning between constructs formed within different representation systems". In computer science, the concept is relevant whenever ordinary human activities, observations, and tasks are transferred into a computational representation.

More precisely the gap means the difference between ambiguous formulation of contextual knowledge in a powerful language (e.g. natural language) and its sound, reproducible and computational representation in a formal language (e.g. programming language). Semantics of an object depends on the context it is regarded within. For practical application this means any formal representation of real world tasks requires the translation of the contextual expert knowledge of an application (high-level) into the elementary and reproducible operations of a computing machine (low-level). Since natural language allows the expression of tasks which are impossible to compute in a formal language there are no means to automate this translation in a general way. Moreover, the examination of languages within the Chomsky hierarchy indicates that there is no formal and consequently automated way of translating from one language into another above a certain level of expressional power.