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< xml version="1.0" encoding="utf-8" >. <NotificationServicesInstance xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

4:

<InstanceName>SalesActivity</InstanceName> <SqlServerSystem>%_DBEngineInstance_%</SqlServerSystem> <Applications> <Application> <ApplicationName>TerritorySales</ApplicationName> <BaseDirectoryPath>%_InstancePath_%</BaseDirectoryPath> <ApplicationDefinitionFilePath> %_InstancePath_%\TerritorySales\TerritorySalesADF.xml </ApplicationDefinitionFilePath> <Parameters> <Parameter> <Name>_DBEngineInstance_</Name> <Value>%_DBEngineInstance_%</Value> </Parameter> <Parameter> <Name>_InstancePath_</Name> <Value>%_InstancePath_%\TerritorySales</Value> </Parameter>

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</Parameters> </Application> </Applications> <DeliveryChannels> <DeliveryChannel> <DeliveryChannelName>FileChannel</DeliveryChannelName> <ProtocolName>File</ProtocolName> <Arguments> <Argument> <Name>FileName</Name> <Value> %_InstancePath_%\TerritorySales\Notifications\FileNotifications.htm </Value> </Argument> </Arguments> </DeliveryChannel> </DeliveryChannels> <ParameterDefaults> <Parameter> <Name>_InstancePath_</Name> <Value>C:\NS</Value> </Parameter> </ParameterDefaults> </NotificationServicesInstance>

6. On the File menu, select Save SalesActivityICF.xml As. In the File Name dialog box, type C:\NS\SalesActivityICF.xml, and then click Save. Your ICF file is now complete.



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The ADF is the main file used to describe the events, rules, subscriptions, and rules for notification that comprise a Notification Services application. As previously mentioned in this chapter, Notification Services uses a SQL Server database to manage the tasks performed by the application and to store associated data. The ADF defines the schema of





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the database objects and the queries used to collect events, match events to subscriptions, and generate notifications. You can optionally add indexes to improve application performance. A basic ADF file includes definitions for an event class, a subscription class, a notification class, one or more providers, a generator, distributors, and application execution settings. Specific information about each of these definitions is provided in the following sections in which we walk you through the process of building an ADF. By default, Notification Services creates a database for the application named <InstanceName><ApplicationName> using the model database as a template. You can override this default behavior by including a Database section in the ADF, just as you can in the ICF. In the example application we re building, we ll let Notification Services create a database, so we ll omit this section and focus only on the basic requirements. Note

Figure 4-2

For more information about using elements to define the application database, refer to the topic Database Element (ADF) in SQL Server Books Online.

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The following sections illustrate the code required to develop an ADF. You will find a complete sample ADF file, TerritorySalesADF.xml, on the book s companion CD in the \Scripts\ 24 folder.

An ADF is an XML file just like the ICF, so you can use any XML editor or Visual Studio to create and edit the file. You can also edit the file using SQL Server Management Studio. The root element for an ADF file is Application. An ADF must conform to the ConfigurationFileSchema, which is included as a default namespace in the file. Here is the code to begin a new ADF, to which we ll add required elements later in this chapter:

<Application xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

As with the ICF templates, you can find two templates in SQL Server Books Online to help you build an ADF more rapidly. Locate the topics Minimal

Again, since user adoption is critical, you will always need training Even on a system that is easy to use, you still need training on how people should find content, and the value of sharing information in a way that others can reuse Official training should contain screenshots of the live, customized system You can also do informal training with brown bag seminars over lunch Another popular technique is to use a software tool that generates a Flash animation based on screenshots, so your users can get a feel for the flow of the system

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First, you need to understand how to collect events from a source. A Notification Services event provider allows you to query a data source and return the results as events to your application. If the source data is in an XML format or in a relational database, you can use the built-in providers to access the data for insertion into the Notification Services databases. Otherwise, you need to develop a custom provider and include it in your application. Next, you define an event class to describe the properties of the tables, views, basic indexes, and stored procedures used to store and manage events in the application database. If you need to track different types of events within a single application, you can create separate event classes. An event class has several elements:

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I suggest you look into the Tesseract OCR library (currently maintained by Google) which also has a .NET binding here and a related SO question here.












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