diff --git a/examples/python/boxes/build-xml.py b/examples/python/boxes/build-xml.py
index fcbe242ee..4bac9fff4 100644
--- a/examples/python/boxes/build-xml.py
+++ b/examples/python/boxes/build-xml.py
@@ -80,10 +80,11 @@ outer_box = openmc.Cell(cell_id=3, name='outer box')
 inner_cube = +x3 & -x4 & +y3 & -y4 & +z3 & -z4
 middle_cube = +x2 & -x5 & +y2 & -y5 & +z2 & -z5
 outer_cube = +x1 & -x6 & +y1 & -y6 & +z1 & -z6
+outside_inner_cube = -x3 | +x4 | -y3 | +y4 | -z3 | +z4
 
 # Use surface half-spaces to define regions
 inner_box.region = inner_cube
-middle_box.region = middle_cube & ~inner_cube
+middle_box.region = middle_cube & outside_inner_cube
 outer_box.region = outer_cube & ~middle_cube
 
 # Register Materials with Cells
@@ -116,3 +117,18 @@ settings_file.inactive = inactive
 settings_file.particles = particles
 settings_file.set_source_space('point', [0., 0., 0.])
 settings_file.export_to_xml()
+
+###############################################################################
+#                   Exporting to OpenMC plots.xml File
+###############################################################################
+
+plot = openmc.Plot(plot_id=1)
+plot.origin = [0, 0, 0]
+plot.width = [20, 20]
+plot.pixels = [200, 200]
+plot.color = 'cell'
+
+# Instantiate a PlotsFile, add Plot, and export to XML
+plot_file = openmc.PlotsFile()
+plot_file.add_plot(plot)
+plot_file.export_to_xml()
diff --git a/examples/xml/boxes/geometry.xml b/examples/xml/boxes/geometry.xml
index 29867f01f..abe4924e6 100644
--- a/examples/xml/boxes/geometry.xml
+++ b/examples/xml/boxes/geometry.xml
@@ -31,9 +31,9 @@
   <cell id="1" material="1" region="3 -4 13 -14 23 -24" />
 
   <!-- Middle cubic shell -->
-  <cell id="2" material="2" region="2 -5 12 -15 22 -25 ~(3 ^ -4 ^ 13 ^ -14 ^ 23 ^ -24)" />
+  <cell id="2" material="2" region="2 -5 12 -15 22 -25 (-3 | 4 | -13 | 14 | -23 | 24)" />
 
   <!-- Outermost cubic shell -->
-  <cell id="3" material="3" region="1 -6 11 -16 21 -26 ~(1 ^ -5 ^ 12 ^ -15 ^ 22 ^ -25)" />
+  <cell id="3" material="3" region="1 -6 11 -16 21 -26 ~(2 -5 12 -15 22 -25)" />
 
 </geometry>
diff --git a/examples/xml/boxes/materials.xml b/examples/xml/boxes/materials.xml
index c6a591d2a..6f6114a7d 100644
--- a/examples/xml/boxes/materials.xml
+++ b/examples/xml/boxes/materials.xml
@@ -15,8 +15,8 @@
 
   <material id="3">
     <density value="1.0" units="g/cc" />
-    <nuclide name="H-1" ao="2.0" />
     <nuclide name="O-16" ao="1.0" />
+    <nuclide name="H-1" ao="2.0" />
     <sab name="HH2O" xs="71t" />
   </material>
 
diff --git a/examples/xml/boxes/plots.xml b/examples/xml/boxes/plots.xml
new file mode 100644
index 000000000..b7a3093d2
--- /dev/null
+++ b/examples/xml/boxes/plots.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0"?>
+<plots>
+  <plot id="1" type="slice">
+    <color>cell</color>
+    <origin>0. 0. 0.</origin>
+    <width>20. 20.</width>
+    <pixels>200 200</pixels>
+  </plot>
+</plots>