ISO/IEC 10728:1993 情報技術—情報リソース辞書システム（IRDS）サービスインターフェイス | ページ 6

3.2.1

active

A state in which a dictionary is accessible to all relevant IRDS services. When an IRD is not active, only the Reactivate IRD service is applicable.

3.2.2

archived

A content status class that indicates data that is no longer in active use.

3.2.3

attribute

A characteristic of an object.

3.2.4

common table

A table that exists in each IRD Definition and each IRD.

3.2.5

content module

A collection of objects introduced into an IRD Definition or IRD at the same time and from the source, identified by a module name that indicates the source of the module.

3.2.6

context

A working set established by default or by user request within which IRDS services are performed.

3.2.7

controlled

A content status class that indicates data that is stable and not subject to change.

3.2.8

definition object

An object recorded at the IRD definition level that controls the data which may be present at the IRD level.

3.2.9

dictionary

An IRD Definition or IRD

3.2.10

environment table

A table that exists once in each IRD Definition, controlling the services provided on that IRD Definition and any associated IRDs.

3.2.11

implementation-defined

Behaviour not defined by this International Standard, but which shall be precisely defined by any conforming implementation

3.2.12

implementation-dependent

Behaviour not defined by this International Standard, and which an implementation is not required to define. Further, there is no requirement that such behaviour be consistent from case to case.

3.2.13

internal table

A table that exists once in each IRD Definition and each IRD, rows in which cannot be accessed by the object-related services in clause 9.

3.2.14

IRD-specific table

A table that exists only in the IRD Definition or a specific IRD, as part of the representation of the data structuring rules of a defined data modelling facility.

3.2.15

IRD content status

A user-defined attribute of a working set. Every value of IRD content status belongs to one of the three predefined content status classes. Each object version takes its IRD content status from the working set that contains it.

3.2.16

IRD content status class

One of three predefined sets of IRD content statuses: uncontrolled, controlled and archived.

3.2.17

IRD object

An object recorded at the IRD level.

3.2.18

IRD Schema Group

A collection of one or more IRD Schemas that completely defines what may exist at any time in an IRD.

3.2.19

IRDS database

An IRD definition and zero or more IRDs.

3.2.20

IRDS environment

An operational instance of an implementation of the IRDS Services Interface managing an IRDS database.

3.2.21

IRDS name

A name optionally assigned when an object is added to an IRD or a definition object is added to an IRD definition. If specified, the combination of IRDS name, variation name, working set name and working set version name shall be unique.

3.2.22

IRDS session

A temporary association between an IRDS user and an IRDS environment, during which the former requests services and the latter performs them.

3.2.23

IRDS user

An individual or group authorized to use the IRDS.

3.2.24

level independent service

A service that is equally applicable to the IRD Definition level and the IRD level.

3.2.25

level specific service

A service which only applies either to the IRD Definition level or to the IRD level, but not both.

3.2.26

materialization (of a working set)

That collection of object versions that can be in the working table of a cursor opened on that working set.

3.2.27

name

A string of characters used to distinguish objects, either alone or in combination with other names.

3.2.28

non-versionable (of an object type)

Indicates that only one version of an object of that type may exist at any time, in a non-versionable working set; of a working set, indicates that the working set may not be based on another working set or be used as the basis for another working set.

3.2.29

object

Any concept or thing of interest to an enterprise.

3.2.30

object type

A class of objects all of whose attributes belong to a common set of attribute types.

3.2.31

object version

A record of the information about an object that is current for some period of time in some information processing context.

3.2.32

reference path

A directed association from one working set to another which allows an object version in the first working set to reference object versions in the second working set. A reference path allows references only in the direction in which it is specified.

3.2.33

referenced table

The table to which the reference is made in a referential constraint.

3.2.34

referencing table

The table from which the reference is made in a referential constraint.

3.2.35

subtable

Let SUBT and SUPERT be tables. SUBT is defined to be a subtable of SUPERT if and only if every row of SUBT corresponds to one and only one row of SUPERT, and each row of SUPERT corresponds to at most one row of SUBT. SUPERT is defined to be a supertable of SUBT.

3.2.36

supertable

A table that has at least one subtable (see definition of subtable).

3.2.37

uncontrolled

A content status class that indicates data that is not stable.

3.2.38

variation name

A name used to identify significantly different variants of objects with the same IRDS name.

3.2.39

versionable (of an object type)

Indicates that more than one version of an object of that type may exist at the same time, in different working sets; of a working set, indicates that the working set may not contain objects of non-versionable object types, may be based on another working set and may be used as the basis for another working set.

3.2.40

working set

A collection of versions of either definition objects or IRD objects, defined by an IRDS user as a unit for the purposes of change management, content status specification and access control.