I figured it out and I thought I would leave an explanation here for any people looking for this answer.
Say you have a form in a start event like this.
<code>
<startEvent id="startevent1" name="User Requests Travel" activiti:formKey="ConferenceAttendanceForm">
<extensionElements>
<activiti:formProperty id="AttName" name="Attendee Name" type="string" required="true"></activiti:formProperty>
<activiti:formProperty id="AttRank" name="Attendee Rank" type="string"></activiti:formProperty>
<activiti:formProperty id="AttDegree" name="Attendee Degree" type="string"></activiti:formProperty>
<activiti:formProperty id="AttJobTitle" name="Attendee Job Title" type="string" required="true"></activiti:formProperty>
<activiti:formProperty id="AttDept" name="Attendee Department" type="enum" required="true">
</extensionElements>
</startEvent>
</code>
A subsequent UserTask can see the data fields like this. value="${activiti:formProperty.id}"
<code>
<userTask id="usertask2" name="Department Approval" activiti:candidateGroups="deptAdmin,deptHead" activiti:formKey="ConferenceAttendanceForm">
<extensionElements>
<activiti:formProperty id="AttName" name="Attendee Name" value="${AttName}" type="string" required="true"></activiti:formProperty>
<activiti:formProperty id="AttRank" name="Attendee Rank" value="${AttRank}" type="string"></activiti:formProperty>
<activiti:formProperty id="AttDegree" name="Attendee Degree" value="${AttDegree}" type="string"></activiti:formProperty>
<activiti:formProperty id="AttJobTitle" name="Attendee Job Title" value="${AttJobTitle}" type="string" required="true"></activiti:formProperty>
<activiti:formProperty id="AttDept" name="Attendee Department" value="${AttDept}" type="enum" required="true"> </activiti:formProperty>
</extensionElements>
</userTask>
</code>