For the purpose of this document, the following definitions apply.
unit of information within an entity, defined by a particular type or reference to a particular entity
scalar values or collections including Set (unordered, unique), List (ordered), or Array (ordered, sparse) as defined in [ISO 10303-11]
unit of information defining queries for obtaining related data and enforcing referential integrity
unit of information computed from other attributes using an expression defined in the schema
data type restricting the values of attributes
class of information defined by common attributes and constraints as defined in [ISO 10303-11]
capability to find, retrieve, report, change, or delete specific instances without ambiguity
occurrence of an entity
anything perceivable or conceivable that has a distinct existence, albeit not material
basic information construct derived from a primitive, an enumeration, or a select of entities
construct that allows an attribute value to be one of multiple types or entities
construct that allows an attribute value to be one of multiple predefined values identified by name
person, an organization, or person acting on behalf of an organization
categorization, the act of distributing things into classes or categories of the same type
restriction for a specified reason
directive to meet specified requirements such as for scope, time, and/or cost
collection of words, terms or concepts, with their definition
tangible physical product that can be described by its shape representation, material representations, and other properties
element's position within the project coordinate system and its containment within the spatial structure
link to information outside the data set, with direct relevance to the specific information the link originates from inside the data set
parametric information and additional property information modifiying the shape representation of an element to which it applies
collection of information that fulfills a specified purpose
catalogue, database or holder of data, that is relevant to information in the data set
characteristics of an object as an individual
common characteristics shared by multiple object-occurrences
object-occurrence located in time, indicating "when"
conceptual object that may occur at a particular time
common characteristics shared by multiple process occurrences
physical or conceptual object that occurs in space
physical or conceptual object that may have a location in space and shape characteristics
common characteristics shared by multiple product occurrences
encapsulation of related information for a particular purpose providing context for information contained within
unit of information that is dynamically defined as a particular entity instance
unit of information providing a value for a property identified by name
metadata for a property including name, description, and data type
unit of information containing a set of property occurrences, each having a unique name within the property set
set of property templates serving a common purpose and having applicability to objects of a particular entity
object that does not hold a specific object type information
measurement of a scope-based metric, specifically length, area, volume, weight, count, or time
unit of information providing a value for a quantity
unit of information containing a set of quantity occurrences, each having a unique name within the quantity set
unit of information describing an interaction between items
unit of information describing how an object is displayed, such as physical shape or topology
entity with limited availability such as materials, labor, or equipment
entity with inherent financial cost, which may be passed onto processes, products, and controls to which it is assigned
common characteristics shared by multiple resource occurrences
area or volume bounded actually or theoretically
For the purpose of this document, the following abbreviated terms
apply:
| AEC | Architecture, Engineering, and Construction |
| AEC/FM | Architecture, Engineering, Construction, and Facilities Management |
| BIM | Building Information Modeling |
| GUID | Globally Unique Identifier |
| IFC | Industry Foundation Classes |
| IFD | International Framework for Dictionaries |
| SPF | STEP Physical File |
| STEP | STandard for the Exchange of Product data |
| URI | Uniform Resource Identifier |
| UUID | Universally Unique Identifier |