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User Guide
The information contained in this section applies to IBM WebSphere Commerce Version 7.0.0.9 and Feautre Pack 8. The documentation also applies to all subsequent releases and modifications until otherwise indicated in new editions.
Developing
The topics in the Developing section describe tasks performed by an application developer.
Presentation layer
WebSphere Commerce uses Java Server Pages (JSP) to implement the view layer of the Model-View-Controller (MVC) design pattern. The view layer is in charge of retrieving data from the database through the use of data beans and formatting it to meet the display requirements. The view layers determines whether the request is sent to a browser or streamed out as XML. JSP files present a clean separation between data content and presentation.
Analytics for IBM WebSphere Commerce
WebSphere Commerce provides a framework that you can configure to integrate your store with an external Web analytics solution. This framework includes a tag library that you can use in store page JSP files to provide appropriate analytics information to the external analytics system.
Analytics tag library for IBM WebSphere Commerce
The basis for the WebSphere Commerce analytics framework is a JSP-based tag library. By adding WebSphere Commerce analytics tags to your store pages, you can communicate information about site usage to an external analytics system.
Syntax for passing JavaScript variables as extra parameters
You can pass a JavaScript variable as an extra parameter to any of the tags for IBM Digital Analytics, formerly known as Coremetrics Analytics. However, the syntax that you use for the extraparms values differs according to your feature pack level.

Syntax for passing JavaScript variables as extra parameters

You can pass a JavaScript variable as an extra parameter to any of the tags for IBM Digital Analytics, formerly known as Coremetrics Analytics. However, the syntax that you use for the extraparms values differs according to your feature pack level.

The syntax rules are:

You must use properly escaped JavaScript for the extraparms values.
You can use the simplified JavaScript format for the extraparms values, but you must use the prefix jsvar for the JavaScript variable.

Example

Consider the following JavaScript snippet:

<script type="text/JavaScript">
var jsExtraParamValue = "abc_123";
</script>

This snippet defines a JavaScript variable named jsExtraParamValue that has a value of abc_123. If you want to pass the value to the IBM Digital Analytics tags, use the syntax that applies to your feature pack level as demonstrated in these examples:

Use properly escaped JavaScript for the value:<cm:pageview extraparms=\"jsExtraParamValue\" />
Use the simplified JavaScript format for the value, and use the prefix jsvar for the JavaScript variable:<cm:pageview extraparms="jsvar:jsExtraParamValue" />