class

descriptor of a set of objects that share the same attributes, operations, methods, relationships, and behaviour

codelist

flexible enumeration useful for expressing a long list of values, can be extended

enumeration

data type whose instances form a list of named literal values, not extendable

codelistElement

permissible value for a codelist or enumeration

abstractClass

class that cannot be directly instantiated

aggregateClass

class that is composed of classes it is connected to by an aggregate relationship

specifiedClass

subclass that may be substituted for its superclass

datatypeClass

class with few or no operations whose primary purpose is to hold the abstract state of another class for transmittal, storage, encoding or persistent storage

interfaceClass

named set of operations that characterize the behaviour of an element

unionClass

class describing a selection of one of the specified types

metaClass

class whose instances are classes

typeClass

class used for specification of a domain of instances (objects), together with the operations applicable to the objects. A type may have attributes and associations

characterString

textual information

integer

numerical field

association

semantic relationship between two classes that involves connections among their instances

mandatory

element is always required

optional

element is not required

conditional

element is required when a specific condition is met