Xml Representation of the flowchart

A flowchart is hierarchically structured and XML likewise is hierarchically structured. So what are the difficulties here? I don't know, but you can feel free to add some via a comment. Take an if statement for instance, it consists of a condition, a consequence and an alternative.
So to build this into XML this here seems a valid approach:

<flowchart>
    <if condition="i<1">
	    <consequence>
		    <!-- further XML for the code in the if part -->
		<consequence>
		<alternative>
		    <!-- further XML for the code in the else part -->
		</alternative>
	</if>
</flowchart>

If on the other hand the code inside the condition of the if-statement would become complexer you might make a sepearate tag out of the attribute "condition" like so:

<flowchart>
    <if>
        <condition>
            <!-- further XML for the code of the condition of the if -->
        </condition>
        <consequence>
	    <!-- further XML for the code in the if part -->
	<consequence>
	<alternative>
	    <!-- further XML for the code in the else part -->
	</alternative>
    </if>
</flowchart>

[Modification: Inspired by CPallini's[^] Solution 1[^]]

<flowchart>
    <sequence id="initialization">
        <block id="block1" followRef="block2">
            <!-- further XML for the code for the content of block 1 -->
	    </block>
	    <block id="block2" followRef="block1">
	        <!-- further XML for the code for the content of block 2 -->
	    </block>
    </sequence>
</flowchart>

[End Modification]
The followRef attributes link from one block to another and in this case I even formed a cycle. (Just for instructional purposes though and not so meaningful in this context)
Regards,

— Manfred