(Quick Reference) # 8.2.2.1 Variables and Scopes Version: 3.2.8 ## 8.2.2.1 Variables and Scopes Variables can be defined within a GSP using the set tag:
    <g:set var="now" value="${new Date()}" />
Here we assign a variable called `now` to the result of a GSP expression (which simply constructs a new `java.util.Date` instance). You can also use the body of the `<g:set>` tag to define a variable:
    <g:set var="myHTML">
       Some re-usable code on: ${new Date()}
    </g:set>
The assigned value can also be a bean from the applicationContext:
    <g:set var="bookService" bean="bookService" />
Variables can also be placed in one of the following scopes: `page` - Scoped to the current page (default) `request` - Scoped to the current request `flash` - Placed within flash scope and hence available for the next request `session` - Scoped for the user session `application` - Application-wide scope. To specify the scope, use the `scope` attribute:
    <g:set var="now" value="${new Date()}" scope="request" />
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