To find all available operators, you can open the OCL-Editor and type in a class:

Operators	Description
allInstances	All the objects of the class
allinstancesAtTime	All the currently loaded instances
allLoadedObjects	All objects currently in memory, excluding deleted objects
allStates	Meta information about available states in state machines the class may contain
allSubClasses	Meta information on all the sub-classes this class has
allSuperTypes	Meta information on all the super-classes – in inheritance order the class has
ASCII	The set of symbols and characters used to specify constraints on objects in software development.
associationEnds	Returns a collection of strings with association names for the class
associationEndsWithType	Returns a collection of strings with association names and type information for the class
asString	The string representation of the class – the asString operation is available on everything
asTaJson	Returns a json string defined by the ViewModel
atTime	Gives the read-only representation of a versioned object as it was at time X.
Attributes	Meta information about what attributes the class has
BigEndianUnicode	A data encoding format for Unicode characters
brokenConstraints	Returns a collection of the names of broken constraints for the class and object.
canAccess	Check ViewModels Access expression for root
Constraints	Meta information on what constraints the class has
count	Returns how many times the object is in the collection self.
Empty	Used to check if a collection or string is empty or not
emptylist	Returns an empty list typed to hold objects of the class
existing	The existing operator returns true if the object hasn't been deleted.
externalId	Returns the external ID for the object operated on.
format	Used to create formatted strings based on a given pattern.
IsDirty	Returns true if the objects have been changed since the last save.
IsNew	IsNew operator returns true if the object has never been saved to the database.
isDirtyMember	Called on a class attribute to check if this attribute has changes pending to be saved.
isNull	Returns true if the value is null (not assigned any value).
maxValue	Gets the maximum value in a collection of values
minValue	Gets the minimum value in a collection of values
nullValue	A typed null value
objectFromExternalId	An external identity will be resolved to the object
oclAsType	The type of the class
oclGetStates	Gets a list of the objects all state machines currently state as strings.
oclIsInvalid	Returns true if self is equal to *invalid*.
oclIsKindOf	This is to if a class is a subclass or as the class itself and not unrelated
oclIsTypeOf	Returns true if
OnCreate	Is often called when a new object has been created.
OnUpdate	Is called just before the object is saved to the database.
oclIsUndefined	Returns true if self is equal to invalid or null.
OclType	When used on an object, you get the type of the object.
random	Used to generate a random value within a specified range or collection
safeCast	Used to safely cast an object to a subtype.
sqlpassthrough	Calls a stored procedure
sqlpassthroughobjects	Return a primary key of SomeClass. This can be combined with other Ocl-PS via ->intersection or union.
superTypes	Returns the set of all direct supertypes of the type.
TaggedValue	Meta information on tagged values set in the class
TaggedValueOnFeature	Meta information on Tagged values set on a named feature in the class
Typename	The type name as a string
ViewModels	A tuple with the ViewModels for this class a members

See also: OCLOperators