The document discusses sequence diagrams and their elements. A sequence diagram models the interactions between objects in a system by showing message exchanges in time sequence. It contains lifelines that represent objects or roles, and messages that represent interactions between lifelines. Sequence diagrams can also include combined fragments that allow modeling alternative flows, loops, and other control structures.
A search engine recommends pages to users based on extracted page features. It creates a structure feature recommender that takes in a page and recommends it. The search engine performs a Yahoo search with the query and returns a list of pages.
The document provides a sequence diagram for the use cases of a smart stock business application. It outlines 9 use cases: 1) Request for opening account, 2) Successful login, 3) Sell order, 4) Buy order, 5) Fund withdrawal order, 6) Cancel order, 7) Approve request, 8) Reject request, and 9) Auto logout. For each use case, it identifies the actors and their interactions, such as a client requesting an account, logging in, making orders, and an admin approving or rejecting requests. It details the flow of activities and communications between actors like the client, admin, and system.
This document discusses various UML diagrams used for modeling software systems. It describes structural diagrams like class and component diagrams that focus on static aspects, and behavioral diagrams like sequence, state, activity, use case and interaction diagrams that focus on dynamic aspects. It provides examples and explanations of sequence diagrams, collaboration diagrams and state diagrams. It also covers how interaction diagrams are used to refine object models, and defines concepts like objects, messages and activation in sequence diagrams.
This document discusses the observer design pattern. It defines the observer pattern as defining a one-to-many dependency between objects so that when one object changes state, all its dependents are notified. It provides class and sequence diagrams to illustrate the pattern. It also discusses implementing the observer pattern in Java using the built-in Observable and Observer classes.
This document discusses interaction diagrams, which describe how objects collaborate in behaviors and use cases. It specifically focuses on sequence diagrams, which emphasize the order of interactions, and collaboration diagrams, which emphasize interacting objects. Examples are provided of how sequence diagrams represent messages between objects and activation, asynchronous messages, and other elements to show conditional and concurrent processes.
The document discusses sequence diagrams and their elements. A sequence diagram models the interactions between objects in a system by showing message exchanges in time sequence. It contains lifelines that represent objects or roles, and messages that represent interactions between lifelines. Sequence diagrams can also include combined fragments that allow modeling alternative flows, loops, and other control structures.
A search engine recommends pages to users based on extracted page features. It creates a structure feature recommender that takes in a page and recommends it. The search engine performs a Yahoo search with the query and returns a list of pages.
The document provides a sequence diagram for the use cases of a smart stock business application. It outlines 9 use cases: 1) Request for opening account, 2) Successful login, 3) Sell order, 4) Buy order, 5) Fund withdrawal order, 6) Cancel order, 7) Approve request, 8) Reject request, and 9) Auto logout. For each use case, it identifies the actors and their interactions, such as a client requesting an account, logging in, making orders, and an admin approving or rejecting requests. It details the flow of activities and communications between actors like the client, admin, and system.
This document discusses various UML diagrams used for modeling software systems. It describes structural diagrams like class and component diagrams that focus on static aspects, and behavioral diagrams like sequence, state, activity, use case and interaction diagrams that focus on dynamic aspects. It provides examples and explanations of sequence diagrams, collaboration diagrams and state diagrams. It also covers how interaction diagrams are used to refine object models, and defines concepts like objects, messages and activation in sequence diagrams.
This document discusses the observer design pattern. It defines the observer pattern as defining a one-to-many dependency between objects so that when one object changes state, all its dependents are notified. It provides class and sequence diagrams to illustrate the pattern. It also discusses implementing the observer pattern in Java using the built-in Observable and Observer classes.
This document discusses interaction diagrams, which describe how objects collaborate in behaviors and use cases. It specifically focuses on sequence diagrams, which emphasize the order of interactions, and collaboration diagrams, which emphasize interacting objects. Examples are provided of how sequence diagrams represent messages between objects and activation, asynchronous messages, and other elements to show conditional and concurrent processes.