How can I have ColdFusion tags in a variable and have them evaluated?
<cfset a = '<model:sparkline id="1"/>'/>

<cfimport taglib="./tags" prefix="model">

<cfsavecontent variable="a">
    <model:sparkline id="1" />
</cfsavecontent>

<cfoutput>#a#</cfoutput>

<cfsavecontent variable="a">
    <model:sparkline id="1" />
</cfsavecontent>