Annex A: Terms and definitions ofthe ISO 19100 standards
247
capability to communicate, execute programs, or transfer data among various functional units in a manner that requires the user to have little or no knowledge of the
unique characteristics ofthose units (lSOIEC07 1993, IS050 2002)
isolated node
node not related to anyedge (lS039 2003)
isomorphism
relationship between two domains (such as two complexes) such that there are oneto-one, structure-preserving functions from each domain onto the other, and the
composition of the two functions, in either order, is the corresponding identity function (lS039 2003)
NOTE
A geometrie complex is isomorphie to a topological complex if
their elements are in a one-to-one, dimension- and boundary-preserving correspondence to one another.
item
that which can be individually described or considered (lS015 1989, IS046 2001)
NOTE
An item can be any part of a dataset, such as a feature, feature relationship, feature attribute, or combination ofthese.
Julian date
Julian day number followed by the decimal fraction of the day e1apsed since the preceding noon {lS040 2002)
Julian day number
number of days elapsed since Greenwich mean noon on 1 January 4713 BC, Julian
proleptic calendar (lS040 2002)
language identifier
information in a terminological entry which indicates the name of a language {ISO 1 0
2000, IS036 2002)
lexicallanguage
language whose syntax is expressed in terms of symbols defined as character strings
{lS034 2002)
life span
period during which something exists
NOTE
Valid-time lifespan is the period during which an object exists in
the modelled reality. Transaction-time lifespan is the period during which a database
object is current in the database. (IS040 2002)
linear positioning system
positioning system that measures distance from a reference point along a route
(IS048 2002)
247
capability to communicate, execute programs, or transfer data among various functional units in a manner that requires the user to have little or no knowledge of the
unique characteristics ofthose units (lSOIEC07 1993, IS050 2002)
isolated node
node not related to anyedge (lS039 2003)
isomorphism
relationship between two domains (such as two complexes) such that there are oneto-one, structure-preserving functions from each domain onto the other, and the
composition of the two functions, in either order, is the corresponding identity function (lS039 2003)
NOTE
A geometrie complex is isomorphie to a topological complex if
their elements are in a one-to-one, dimension- and boundary-preserving correspondence to one another.
item
that which can be individually described or considered (lS015 1989, IS046 2001)
NOTE
An item can be any part of a dataset, such as a feature, feature relationship, feature attribute, or combination ofthese.
Julian date
Julian day number followed by the decimal fraction of the day e1apsed since the preceding noon {lS040 2002)
Julian day number
number of days elapsed since Greenwich mean noon on 1 January 4713 BC, Julian
proleptic calendar (lS040 2002)
language identifier
information in a terminological entry which indicates the name of a language {ISO 1 0
2000, IS036 2002)
lexicallanguage
language whose syntax is expressed in terms of symbols defined as character strings
{lS034 2002)
life span
period during which something exists
NOTE
Valid-time lifespan is the period during which an object exists in
the modelled reality. Transaction-time lifespan is the period during which a database
object is current in the database. (IS040 2002)
linear positioning system
positioning system that measures distance from a reference point along a route
(IS048 2002)