* 型 [CODE(JS)@en[Boolean]]、ブール値 (JavaScript)

[4] 
>    A [DFN@en[boolean value]] is a [[member]] of the [[type]] [DFN@en[[[Boolean]]]]
and is one of two unique [[values]], [CODE(JS)@en[[[true]]]] and [CODE(JS)@en[[[false]]]].

;;[CITE[ECMAScript Language Specification (HTML version)]] ([TIME[2009-04-03 04:43:48 +09:00]] 版) <http://bclary.com/2004/11/07/#a-4.3.13>

[5] 
> The [[type]] [DFN@en[[CODE(JS)@en[Boolean]]]] represents a logical entity and consists of exactly two unique [[values]].
One is called [CODE(JS)@en[[[true]]]] and the other is called [CODE(JS)@en[[[false]]]].

;; [CITE[ECMAScript Language Specification (HTML version)]] ([TIME[2009-04-03 04:43:48 +09:00]] 版) <http://bclary.com/2004/11/07/#a-4.3.14>

* [CODE(JS)@en[Boolean]] オブジェクト (JavaScript)

[6] 
>A [DFN@en[Boolean object]] is a [[member]] of the [[type]] [CODE(JS)@en[[[Object]]]] and is an
[[instance]] of the [[built-in]] [CODE(JS)@en[[[Boolean]]]] [[object]]. That is, a [[Boolean object]]
is created by using the [CODE(JS)@en[[[Boolean]]]] [[constructor]] in a [CODE(JS)@en[[[new]]]] [[expression]],
supplying a [[boolean]] as an [[argument]]. The resulting [[object]] has an implicit (unnamed) [[property]]
that is the [[boolean]]. A [[Boolean object]] can be coerced to a [[boolean value]].

;;
[CITE[ECMAScript Language Specification (HTML version)]] ([TIME[2009-04-03 04:43:48 +09:00]] 版) <http://bclary.com/2004/11/07/#a-4.3.15>

* 真偽値 (boolean) 級 (VTN 特性集合)

[1] [[VTN]] [[特性集合]]の[[級]] [DFN[[RUBYB[boolean] [真偽値]] ]]
は、真偽値 ([CODE(SGML)[boolean]]) 型 (の特性値) に対応します。

仕様書: [[ISO/IEC 10744]]:1997 A.4.4.1 Value-To-Node (VTN) grove construction
<http://www.y12.doe.gov/sgml/wg8/docs/n1920/html/clause-A.4.4.html#clause-A.4.4.1>

[2] 
:[[規格参照具象構文名]]:[CODE(SGML)[boolean]]
:[[応用名]]:[CODE(SGML)[boolean]]
:[[完全名]]:[CODE(SGML)[boolean]]
:[[特性]]:
,特性番号	,規格参照具象構文名	,応用名	,完全名	,型	,値
,1〜12	,[[内在特性]]	,==	,==	,==	,==
,13 (内在特性)	,[CODE(SGML)[source]]	,==	,[RUBYB[source] [原始]]	,[CODE(SGML)[[[node]]]] ([CODE(SGML)[[[urefnode]]]])	,原始グローブの節
,14	,[CODE(SGML)[[[srcprop]]]]	,[RUBYB[source property] [原始特性]]	,==	,[CODE(SGML)[[[compname]]]]	,原始グローブの特性名
,15	,[CODE(SGML)[[[value]]]]	,==	,[RUBYB[value] [値]]	,[CODE(SGML)[[[boolean]]]]	,特性値


[3] ある節 [VAR[n]] の特性 [VAR[p]] (型は [CODE(SGML)[boolean]] で、
値は [VAR[b]])
について VTN グローブを構築すると、次のようになります。

- 節 (級: [CODE(SGML)[boolean]])
-- 特性 [CODE(SGML)[source]] = [VAR[n]]
-- 特性 [CODE(SGML)[srcprop]] = [VAR[p]] の名前
-- 特性 [CODE(SGML)[value]] = [VAR[b]]

(もちろん、このほかに内在特性が適当な値を取ります。)