-. 接続(4.3.8参照)のような、プラントアイテム間の関連
-. プラントアイテムと工程の間の関連又は工程
-. プラントアイテムあるいは工程による特徴の所有
4.3.42 現場(site)：一つあるいは複数のプロセスプラントが作られる土地または海洋上のある場所。
4.3.43 空間配置(spatial configuration)：プラントシステム(4.3.33参照)の構成要素(4.3.7参照)の位置、方向、相対位置
4.4 略語.
ISO10303-227のために、次の略語を定義する
AAM: application activity model
AE: architectural engineering
AEC: architecture, engineering, and construction
AIC: application interpreted construct
AIM: application interpreted model
AISC: American Institute of Steel Construction
ANSI: American National Standards Institute
AP: application protocol
ARM: application reference model
ASTM: American Society for Testing and Materials
ATS: abstract test suite
B-rep: boundary representation
BOP: bottom of pipe
CAD: computer-aided design
COP: center of pipe
CSG: constructive solid geometry
ECN: engineering change notice
EPA: environmental protection agency
FDA: food and drug administration
GIS: geographic information system
HVAC: heating, ventilation, and air conditioning
id: identifier
ICOM: input, control, output or mechanism
OSHA: occupational safety and health administration
PFD: prccess flow diagram
P&ID: piping and instrumentation diagram
PICS: protocol information and conformance statement
PIEBASE: process industry executive for achieving business advantage using standards for data exchange
PSI: pound per square inch
UoF: unit for functionality
UTM: universal transverse mercator
