1. An ASN.1 Profile Anders Ek
Motivation / Scenarios
Profile Basics
A Draft ASN.1 Profile
Example
Summary

2. Motivation: Usage Scenarios
Access to ASN.1 module from UML models
Visualization of ASN.1 Modules
Design of ASN.1 Modules

3. Accessing ASN.1 Modules Precond: Actions: ASN.1 module exist
Application design using UML
Need to use type definitions
Actions:
Import the ASN.1 module into UML as a package
Access the ASN.1 types from the UML code

4. Visualization of ASN.1 Module
Precond
Complex ASN.1 modules exists
Need to understand the modules
Actions
Import ASN.1 modules into UML
Use UML graphics (mainly composition hierarchies in class diagrams) to explain & understand the module.

5. Design of ASN.1 Modules Precond: Actions No existing ASN.1 module
Need to produce one
Like UML graphics!!
Actions
Design using UML class diagrams
Tag with ASN.1 concepts
Generate the ASN.1 module

6. Motivation: Summary Accessing ASN.1 type defs from UML models
Visualization of ASN.1 Modules
Design of ASN.1 Modules

7. Profile Definition Basics
Purpose:
To define how to associate extra information with model elements in a UML model.
Basics
A ’profile’ is a UML package stereotyped by <<profile>>.
A profile contains stereotypes that define
tagged values (the attributes of the stereotype)
what model element to extend (the ’extends’ relation to a metaclass)
Often includes a ModelLibary (package with data types)
A profile contains constraints that give static semantics
A profile typically comes with dynamic semantics usually
informally definined
implemented as tool feature, often a code generator

8. Simple Profile Example
<<profile>> package
metaclass from appropriate metamodel
extention definition
stereotype definition
tag definitions (stereotype attributes)
<<profile>> package UseCaseDetails
<<metaclass>>
UML::UseCase 1
<<stereotype>>
UseCaseDef
Precondition : Charstring
ActionSequence : Charstring
Alternatives : Charstring
Postcondition : Charstring

9. Using the Profile Apply the profile
activate addin
load & use model profile
Select ’Tagged values...’ for a use case

10. Profiles Summary Extends UML Stereotypes / tagged values Model library
Semantics
Constraints
Dynamic semantics

11. A (Very) Incomplete ASN.1 Profile

12. Profile

13. Model Library

14. Example Module ExampleASN1Module ::= BEGIN
EMPLOYEES ::= SEQUENCE OF PERSON
PERSON ::= SEQUENCE {
name VisibleString,
age INTEGER,
car CAR,
house HOUSE }
CAR ::= SEQUENCE {
licenseNo INTEGER,
manufacturer VisibleString
HOUSE ::= SEQUENCE {
address VisibleString
END

15. ExampleModule

16. Example Application

17. Example Application, cnt

18. Summary Purpose Profile Issues
Usage of ASN.1 modules in UML applications
Visualization / Design
Profile
Stereotypes / tagged values etc
Constraints
Semantics
Issues
Information classes and objects
Inline type definitions
Parametrized classes
Values and value syntax