information system diagram for a Vocational training college.
class diagram for payroll system
Class diagram represent generalized view of system while object diagram represent view of a system at a particular instant.
Activity diagram for pathology laboratory system
class diagrams
a class diagram for online reservation system describe the flow data from user to administrator of particular flight.
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In software engineering, a class diagram is used for describing the structure of a system by showing classes, attributes, operations, and relationships.
yes
http://2.bp.blogspot.com/_V648gqhagYA/TP9zKAHaL9I/AAAAAAAAAfI/BTmG_mf7UCI/s1600/Class-diagram-for-railway-ticket-reservation-system.PNG
Class diagram is UML structure diagram which shows structure of the designed system at the level of classes and interfaces, shows their features, constraints and relationships - associations, generalizations, dependencies, etc.Communication diagram (called collaboration diagram in now obsolete UML 1.x) is an interaction diagram which shows interactions between objects and/or parts (represented as UML lifelines) using sequenced messages in a free-form arrangement.So, the major difference is that class diagram shows static structure of the system while communication (collaboration) diagram shows system behavior as sequenced exchange of messages between objects.
Class diagram is UML diagram describing static structure of a system on the (lowest) level of classifiers (classes, interfaces, etc.). It shows system's classifiers, their attributes, and the relationships between classifiers.The following nodes and edges are typically drawn in a UML Class diagram:ClassInterfaceInterface RealizationRequired InterfaceAssociationGeneralizationDependency
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