class diagram | can contain symbols for classes, associations, attributes, operations, generalizations | ![2001-08-30 14:54:51.0](facet.gif) |
can generate an infinite number of instance diagrams | ![2001-08-30 14:54:51.0](facet.gif) |
has definition A UML diagram that primarily indicates classes and the associations between those classes | ![2001-08-30 14:54:51.0](facet.gif) |
describes the data found in a software system | ![2001-08-30 14:54:51.0](facet.gif) |
has part OCL statement in a class diagram | ![2001-08-30 14:54:51.0](facet.gif) |
is an important tool for requirements analysis and design of object oriented software systems | ![2001-08-30 14:54:51.0](facet.gif) |
is a subtopic of 5.1 - What is UML? | ![2001-08-30 14:54:51.0](facet.gif) |
is a kind of UML diagram | ![2001-08-30 14:54:51.0](facet.gif) |
may show attributes and operations contained in each class by dividing a class box into three smaller boxes: the top box contains the class name, the middle box lists the attributes, and the bottom box lists operations. | ![2001-08-30 14:54:51.0](facet.gif) |
may show that a class has no attributes or operations by showing an empty box | ![2001-08-30 14:54:51.0](facet.gif) |
shows the services offered by components and the main data to be stored | ![2001-08-30 14:54:51.0](facet.gif) |
UML diagram | see also Unified Modelling Language | ![2001-08-30 14:58:07.0](facet.gif) |
diagram | has advantages it conveys or summarizes complex concepts or mechanisms more easily than other techniques | ![2001-08-30 14:55:19.0](facet.gif) |
has problems - can be hard for users to interact with or interpret
- not usable by blind people
- it can be expensive to program diagram drawing software
| ![2001-08-30 14:55:19.0](facet.gif) |
should have a label if its meaning is not obvious, using a caption or pop-up label that appears when the user moves the mouse over it | ![2001-08-30 14:55:19.0](facet.gif) |