IfcDistributionSystemEnum
此枚举标识不同类型的配电系统。它用于根据系统的功能以及此类系统内设备的端口来指定系统，以限制连接到兼容连接。
IFC4中的新枚举。
电缆托架的端口可以使用IfcCableCarrierSegment和IfcCableCarrierFitting连接。为电缆托架段和配件键入对象（不特定于特定系统类型的IfcCableCarrierSegmentType和IfcCableCarrierFittingType可能具有预定义类型为NOTDEFINED的端口，这表明此类对象的出现可能会连接到任何其他基于电缆载波的端口。电缆载波的有效枚举与电缆的有效枚举相同，并且可能是：如果所含电缆的端口均为同一类型，则断言。
| Constant | Description |
|---|---|
| AIRCONDITIONING | Conditioned air distribution system for purposes of maintaining a temperature range within one or more spaces. |
| AUDIOVISUAL | A transport of a single media source, having audio and/or video streams. |
| CHEMICAL | Arbitrary chemical further qualified by property set, such as for medical or industrial use. |
| CHILLEDWATER | Nonpotable chilled water, such as circulated through an evaporator. |
| COMMUNICATION | |
| COMPRESSEDAIR | Compressed air system. |
| CONDENSERWATER | Nonpotable water, such as circulated through a condenser. |
| CONTROL | A transport or network dedicated to control system usage. |
| CONVEYING | Arbitrary supply of substances. |
| DATA | A network having general-purpose usage. |
| DISPOSAL | Arbitrary disposal of substances. |
| DOMESTICCOLDWATER | Unheated potable water distribution system. |
| DOMESTICHOTWATER | Heated potable water distribution system. |
| DRAINAGE | Drainage collection system. |
| EARTHING | A path for equipotential bonding, conducting current to the ground. |
| ELECTRICAL | A circuit for delivering electrical power. |
| ELECTROACOUSTIC | An amplified audio signal such as for loudspeakers. |
| EXHAUST | Exhaust air collection system for removing stale or noxious air from one or more spaces. |
| FIREPROTECTION | Fire protection sprinkler system. |
| FUEL | Arbitrary supply of fuel. |
| GAS | Gas-phase materials such as methane or natural gas. |
| HAZARDOUS | Hazardous material or fluid collection system. |
| HEATING | Water or steam heated from a boiler and circulated through radiators. |
| LIGHTING | A circuit dedicated for lighting, such as a fixture having sockets for lamps. |
| LIGHTNINGPROTECTION | A path for conducting lightning current to the ground. |
| MUNICIPALSOLIDWASTE | Items consumed and discarded, commonly known as trash or garbage. |
| OIL | Oil distribution system. |
| OPERATIONAL | Operating supplies system. |
| POWERGENERATION | A path for power generation. |
| RAINWATER | Rainwater resulting from precipitation which directly falls on a parcel. |
| REFRIGERATION | Refrigerant distribution system for purposes of fulfilling all or parts of a refrigeration cycle. |
| SECURITY | A transport or network dedicated to security system usage. |
| SEWAGE | Sewage collection system. |
| SIGNAL | A raw analog signal, such as modulated data or measurements from sensors. |
| STORMWATER | Stormwater resulting from precipitation which runs off or travels over the ground surface. |
| TELEPHONE | A transport or network dedicated to telephone system usage. |
| TV | A transport of multiple media sources such as analog cable TV, satellite TV, or over-the-air TV. |
| VACUUM | Vacuum distribution system. |
| VENT | Vent system for wastewater piping systems. |
| VENTILATION | Ventilation air distribution system involved in either the exchange of air to the outside as well as circulation of air within a building. |
| WASTEWATER | Water adversely affected in quality by anthropogenic influence, possibly originating from sewage, drainage, or other source. |
| WATERSUPPLY | Arbitrary water supply. |
| USERDEFINED | |
| NOTDEFINED |
EXPRESS Specification
TYPE IfcDistributionSystemEnum = ENUMERATION OF (
AIRCONDITIONING,
AUDIOVISUAL,
CHEMICAL,
CHILLEDWATER,
COMMUNICATION,
COMPRESSEDAIR,
CONDENSERWATER,
CONTROL,
CONVEYING,
DATA,
DISPOSAL,
DOMESTICCOLDWATER,
DOMESTICHOTWATER,
DRAINAGE,
EARTHING,
ELECTRICAL,
ELECTROACOUSTIC,
EXHAUST,
FIREPROTECTION,
FUEL,
GAS,
HAZARDOUS,
HEATING,
LIGHTING,
LIGHTNINGPROTECTION,
MUNICIPALSOLIDWASTE,
OIL,
OPERATIONAL,
POWERGENERATION,
RAINWATER,
REFRIGERATION,
SECURITY,
SEWAGE,
SIGNAL,
STORMWATER,
TELEPHONE,
TV,
VACUUM,
VENT,
VENTILATION,
WASTEWATER,
WATERSUPPLY,
USERDEFINED,
NOTDEFINED);
END_TYPE;
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