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    <p>Physically, it's memory space used to maintain some sort of connection state between the client and the server. On ASP.NET a Session is unique to the user; which is different from Cache, which is memory space shared among all the users of the application. </p> <p><em>Usually</em> session is maintained via cookies (server sends a cookie to the client's browser containing a unique Session ID) but when browsers don't accept cookies, it's usually maintained via url parameters of the form: <code>http://site.com?SessionID=312da312312</code>. Servers use this SessionID to keep track of who is making the connection.</p> <p>Logically, <a href="http://en.wikipedia.org/wiki/Session_%28computer_science%29" rel="nofollow">Wikipedia</a> has a good explanation of the concept:</p> <blockquote> <p>In computer science, in particular networking, a session is a semi-permanent interactive information interchange, also known as a dialogue, a conversation or a meeting, between two or more communicating devices, or between a computer and user (see Login session). A session is set up or established at a certain point in time, and torn down at a later point in time. An established communication session may involve more than one message in each direction. A session is typically, but not always, stateful, meaning that at least one of the communicating parts needs to save information about the session history in order to be able to communicate, as opposed to stateless communication, where the communication consists of independent requests with responses.</p> <p>An established session is the basic requirement to perform a connection-oriented communication. A session also is the basic step to transmit in connectionless communication modes. However any unidirectional transmission does not define a session<a href="http://en.wikipedia.org/wiki/Session_%28computer_science%29" rel="nofollow">1</a>.</p> </blockquote>
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    1. POWhat, logically and physically, is a session?
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    1. COVery good, but I try to discourage people from using cookieless (URL token) sessions as they can cause havoc if the URLs get re-used (indexed by search engines, copied in links etc.)
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      1. USJames McCormack
    2. CO@JamesMcCormack: No doubt, there are serious security implications associated.
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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