【英文标准名称】:Industrialautomationsystemsandintegration-Partslibrary-Logicalresource-Logicalmodelofexpressions
【原文标准名称】:工业自动化系统和集成.零件数据库.逻辑源.表达的逻辑模式
【标准号】:BSISO13584-20-1998
【标准状态】:现行
【国别】:英国
【发布日期】:1998-12-15
【实施或试行日期】:1998-12-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:识别方法;程序设计语言;计算机应用;数据表示;数据传输;结构质疑语言;句法;自动控制系统;逻辑运算;图书馆;控制系统;表达;数据处理;语义学;数据组织;工业的;信息交流;图书馆学与情报学
【英文主题词】:Automation;Automationsystems;Dataprocessing;Datarepresentation;Definition;Definitions;Informationexchange;Informationtechnology;Libraries;Setsofdata
【摘要】:ThispartofISO13584specifies:—anEXPRESSschemaforgenericexpressions,—anEXPRESSschemaforexpressions,thatmodelsthesubsetoftheallowedexpressionsintheEXPRESSlanguagedefinedinISO10303-11thatcorrespondstointeger,real,Booleanandstringdatatypes.Thisschemausestheresourcesdefinedinthegenericexpressionschema.ThefollowingarewithinthescopeofthispartofISO13584:—theexchangeofexpressionsthatinvolvebothconstantsandvariables;—thefunctionthatcheckswhetherornotanumericexpressionshouldevaluatetoanintegervalue;—theconstraintswhichensurethatanexpressionissemanticallycorrect;—thecomputationofthevariablesorfunctionsusedinanexpression;—thefunctionthatchecksifanexpressionmaybemappedontotheSQLquerylanguage.ThefollowingareoutsidethescopeofthispartofISO13584:—theassignmentofvaluestovariableswithinsomecontext;—thetriggeringmechanismthatcomputesthevalueofanexpressioninagivencontext.
【中国标准分类号】:L56
【国际标准分类号】:35_240_50
【页数】:98P;A4
【正文语种】:英语