COMSOL 6.4 - About Name, Identifier, and Tag Properties

The following tables contain information about the name, identifier, and tag properties for various features in a COMSOL model (see Labels and Names in the Settings Window in the COMSOL Multiphysics Reference Manual for more information). Especially, the table provides information about the relationship between names and tags, whether you can change the name in the user interface or the tag using the API, and the access methods and use of names. This information is useful for understanding how these concepts are related, especially when working with both the COMSOL Desktop and programming using the COMSOL API. In the tables below, user interface refers to the Settings windows in the COMSOL Desktop. The term scope in the column in the second table means that the name is used as part of an expression access it in the model object hierarchy; for example, comp1.ht.Cp, where comp1 is the name of the component, and ht is the name of the physics interface (see Variable Naming Convention and Namespace in the COMSOL Multiphysics Reference Manual for more information). The name of a user-defined tag is case sensitive, and it must begin with a lowercase or uppercase letter (a–z or A–Z). All other characters in the name must be a lowercase or uppercase letter, a number 0–9, or an underscore (_). See also Naming Conventions, Reserved Names, and Errors in the COMSOL Multiphysics Reference Manual.

The name/Identifier Concept	Name Same as Tag	Can Change Name in the User Interface	Can Change Tag in the API
Component		Tag changes as well	√
Physics interface		Tag changes as well	√
Physics feature	√	No	√
Multiphysics coupling		Tag changes as well	√
Material	√	No	√
Property group		No	√
Definitions > Functions		Yes	√
Definitions > Coordinate systems		Yes	√
Definitions > Probes		Yes	√
Definitions > Nonlocal couplings		Yes
Definitions > Variable utilities		Yes	√
Definitions > Pairs		Yes	√
Definitions > Density model		Yes	√
Definitions > Ambient properties		Yes	√

The name/Identifier Concept	Access Method for Name	Method for Name Deprecated	Name in User Interface	Use of Name
Component	identifier identifier(string)	√	Name	Scope
Physics interface	identifier identifier(string)	√	Name	Scope
Physics feature	tag tag(string)	√		Scope
Multiphysics coupling	identifier identifier(string)	√	Name	Scope
Material	tag tag(string)		Name	Scope
Property group	identifier identifier(string)	√	Name	Scope
Definitions > Functions	get or set function name properties like funcname		Function name	Function name
Definitions > Coordinate systems	get or set name property		Name	Scope
Definitions > Probes	get or set probename property		Variable name	Variable name
Definitions > Nonlocal couplings	get or set opname property		Operator name	Operator name
Definitions > Variable utilities	get or set name property		Name	Variable or operator name
Definitions > Pairs	pairName() pairName(string)		Pair name	Variable suffix (<name>_p1)
Definitions > Density model	get or set name property		Name	Scope
Definitions > Ambient properties	get or set name property		Name	Scope