Books for you

SysML let ??™ s you defi ne such context-specifi c types to avoid having to defi ne
an entire new block when all you need is a variant of an existing block in a certain
context.
As you can see, the card reader uses the UML version to defi ne initial values.
SysML offers yet another possibility. You can state the initial values in a separate
compartment with the heading defaultValues . This description is more compact
since it is separate from the defi nition that includes both type and multiplicity.
You also have a possibility to pull deeply nested blocks ??? to the surface ??? in the
internal block diagram. You can see in Figure 4.32 that the left and right representations
are equivalent. The notations of arbitrary nesting depths is another extension
introduced by SysML. In contrast, UML doesn ??™ t allow you to show the internal
structures of roles in a composite structure.
As a logical consequence, you can use connectors in an internal block diagram
to directly connect the elements across several nesting borders ( Figure 4.


Pages:
434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458