sequence+diagrams

The sequential treatment of actions occurring in a system is illustrated in a sequence diagram. A sequence diagram has two dimensions. Parallel vertical lines show different processes or objet existing simultaneously whereas the horizontal arrows show the messages communicated between them. It focuses more on the order of the A sequence diagram consists of two elements   It has the following benefits ·  Helps in identifying design, interface and logic problems early. ·  Allows for discussion and collaboration. ·  Used as a documentation of the dynamic view of the system. It has the following disadvantages ·  At source code level they are not very useful, thus right situations should be chosen where these are to be used. ·  It contains too much detail which can be confusing. www-roham.stsu.edu/~haytham/sequence.html (SHAZA KHAN) [|www.wikipedia.org/wiki/sequence_diagram] (SHAZA KHAN) Ibm.com/developer works/rational/library/3101.html (RABBIYA IJAZ) agile modeling.com/artifacts/sequence diagram.html (RABBIYA IJAZ) http://www.developer.com/design/article.php/3080941 (SHARJEEL AWAIS) http://www.altova.com/features_sequence_diagram.html (SHARJEEL AWAIS)
 * SEQUENCE DIAGRAM **
 * 1.   ** **OBJECT:** Object is the primary element of a sequence diagram and it is the instance of a class. Actually a sequence diagram depicts the sequence of the interaction of different objects at different times. In a sequence diagram, an object is depicted by a rectangle. The symbol is shown below, the name on the left of “:” is the object name and on the right is class name.
 * 2.   ** **MESSAGE:** In sequence diagram the interaction between objects is depicted by messages, it is represented by arrows. The notation also differs on the basis of the types of messages. Simple messages, special messages and message responses can be represented in a sequence diagram
 * ADVANTAGES: **
 * DISADVANTAGES: **
 * REFERENCES:**

NOTE: This text is not plagiarised. We have taken it from 6 sources and written it in our own words. For sequence diagrams, refer to the above links.