diagram

In UML, is it possible to draw an aggregation where the component object can access the composite object? Like in this image, but with only one association line, so the association end touching A would have a diamond and an arrow. If that isn't possible, the diagram I drawn is valid? If not, why? Another point of view, navigability is important to show how is it possible to navigate in the model and how to access to instances. Another point is about OCL, if navigability is not defined some OCL queries will be hard to write. Specification describes (p 198): Navigability means that instances

I'm quite new to relational databases and have been having a lot of trouble recently trying to understand an entity relationship diagram I've been given. Here it is: Solicitor ERD (ERD is for a made up solicitor company) Basically my task is to take this ERD and write an SQL script to create the database, obviously filling in the tables with data I can make up. The SQL syntax isn't the thing I'm having a hard time with, it's simply understanding the cardinality in the diagram. To me the terms '1 to 1', '1 to many', 'many to many' just don't click, I have no idea what they mean and how they

I have a problem, which I believe to be best solved through a functional style of programming. Coming from a very imperative background, I am used to program design involving class diagrams/descriptions, communication diagrams, state diagrams etc. These diagrams however, all imply, or are used to describe, the state of a system and the various side effects that actions have on the system. Are there any standardised set of diagrams or mathematical symbols used in the design of functional programs, or are such programs best designed in short functional-pseudo code (given that functions will be

I have a customer who needs to convert a diagramming application (which was developed in MFC a long time ago) to C#. The application displays large networks (lots of graphical elements), and lets the user edit/manipulate the data through a graphical ui. I decided that it would be best to use a library rather than to develop all from scracth (all graphic objects/selection/tools/events/etc) I am looking for a commercial solution. I found three that seem to be very mature, and I wonder if anyone had used them and can write his/her opinon: Tom Sawyer Visualization IBM ILog Diagrammer for .Net

I am looking for a library to generate svg diagrams in python (I fetch data from a sql database). I have found python-gd , but it has not much documentation and last update was in 2005 so I wonder if there are any other libraries that are good for this purpose. I am mostly thinking about simple line graphs, something like this : Rodrigo As you're looking for simple line graphics, probably, CairoPlot will fit your needs as it can generate svg output files out of the box. Take a look at this . This example image shows only a few of its capabilities. Using the trunk version available at launchpad