<p>Trace lifelines are denoted by categories:</p>

<table border="1" cellspacing="1" cellpadding="0">
				<tr>
					<th width="200" id="Lifeline">Lifeline category</td>
					<th width="250" id="Glyph">Corresponding glyph in lifeline title</td>
					</th>
				</tr>
				<tr>
					<td headers="Lifeline">Host</td>
					<td headers="Glyph">Host</td>
				</tr>
				<tr>
					<td headers="Lifeline">Agent</td>
					<td headers="Glyph">Process, Agent</td>
				</tr>
				<tr>
					<td headers="Lifeline">Process</td>
					<td headers="Glyph"></td>
				</tr>
				<tr>
					<td headers="Lifeline">Thread</td>
					<td headers="Glyph"></td>
				</tr>
				<tr>
					<td headers="Lifeline">Class</td>
					<td headers="Glyph"></td>
				</tr>
				<tr>
					<td headers="Lifeline">Object</td>
					<td headers="Glyph"></td>
				</tr>
				<tr>
					<td headers="Lifeline">Collapsed Class/Objects</td>
					<td headers="Glyph"></td>
				</tr>
			</table>
	

Note: In the object interactions view, both Class and Object categories can be present. 
Classes are shown when calls are made to a statitic method of a class.  Objects are
shown for any call to an instance of  a class that is not the <i>java.lang.Class</i> class.
