IfcRecurrencePattern

IfcRecurrencePattern

实体定义

IfcRecurrencePattern根据定期重复定义重复时间段，例如一周中的每个星期一，或一个月中的每个第三个星期二。其余属性（如DayComponent、Position和Interval）的填充取决于指定的递归类型。

 

IfcRecurrencePattern支持通过类型定义（IfcRecurrencePattern.RecurrenceType）区分的各种重复模式，类型定义是提供给定值含义所必需的。它可以通过指定的IfcTimePeriod实例进一步受到适用时间的约束，从而为每个适用的天、周或月启用时间段，例如7:00到12:00以及13:00到17:00。

 

IFC4中的新实体。

 

 

Attribute definitions

#	Attribute	Type	Cardinality	Description	C
1	RecurrenceType	IfcRecurrenceTypeEnum	[1:1]	Defines the recurrence type that gives meaning to the used attributes and decides about possible attribute combinations, i.e. what attributes are needed to fully describe the pattern type.	X
2	DayComponent	IfcDayInMonthNumber	S[1:?]	The position of the specified day in a month.	X
3	WeekdayComponent	IfcDayInWeekNumber	S[1:?]	The weekday name of the specified day in a week.	X
4	MonthComponent	IfcMonthInYearNumber	S[1:?]	The position of the specified month in a year.	X
5	Position	IfcInteger	[0:1]	The position of the specified component, e.g. the 3rd (position=3) Tuesday (weekday component) in a month. A negative position value is used to define the last position of the component (-1), the next to last position (-2) etc.	X
6	Interval	IfcInteger	[0:1]	An interval can be given according to the pattern type. An interval value of 2 can for instance every two days, weeks, months, years. An empty interval value is regarded as 1. The used interval values should be in a reasonable range, e.g. not 0 or <0.	X
7	Occurrences	IfcInteger	[0:1]	Defines the number of occurrences of this pattern, e.g. a weekly event might be defined to occur 5 times before it stops.	X
8	TimePeriods	IfcTimePeriod	L[1:?]	List of time periods that are defined by a start and end time of the recurring element (day). The order of the list should reflect the sequence of the time periods.	X

 

 

 

 

 

 

 

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcRecurrencePattern
1	RecurrenceType	IfcRecurrenceTypeEnum	[1:1]	Defines the recurrence type that gives meaning to the used attributes and decides about possible attribute combinations, i.e. what attributes are needed to fully describe the pattern type.	X
2	DayComponent	IfcDayInMonthNumber	S[1:?]	The position of the specified day in a month.	X
3	WeekdayComponent	IfcDayInWeekNumber	S[1:?]	The weekday name of the specified day in a week.	X
4	MonthComponent	IfcMonthInYearNumber	S[1:?]	The position of the specified month in a year.	X
5	Position	IfcInteger	[0:1]	The position of the specified component, e.g. the 3rd (position=3) Tuesday (weekday component) in a month. A negative position value is used to define the last position of the component (-1), the next to last position (-2) etc.	X
6	Interval	IfcInteger	[0:1]	An interval can be given according to the pattern type. An interval value of 2 can for instance every two days, weeks, months, years. An empty interval value is regarded as 1. The used interval values should be in a reasonable range, e.g. not 0 or <0.	X
7	Occurrences	IfcInteger	[0:1]	Defines the number of occurrences of this pattern, e.g. a weekly event might be defined to occur 5 times before it stops.	X
8	TimePeriods	IfcTimePeriod	L[1:?]	List of time periods that are defined by a start and end time of the recurring element (day). The order of the list should reflect the sequence of the time periods.	X

 

 

 

 

EXPRESS Specification

ENTITY IfcRecurrencePattern;
  RecurrenceType : IfcRecurrenceTypeEnum;
  DayComponent : OPTIONAL SET [1:?] OF IfcDayInMonthNumber;
  WeekdayComponent : OPTIONAL SET [1:?] OF IfcDayInWeekNumber;
  MonthComponent : OPTIONAL SET [1:?] OF IfcMonthInYearNumber;
  Position : OPTIONAL IfcInteger;
  Interval : OPTIONAL IfcInteger;
  Occurrences : OPTIONAL IfcInteger;
  TimePeriods : OPTIONAL LIST [1:?] OF IfcTimePeriod;
END_ENTITY;

 

 

 

#######################