diff --git a/coretk/coretk/data/xmls/sample1.xml b/coretk/coretk/data/xmls/sample1.xml
index 7c8ccf72..c780d21b 100644
--- a/coretk/coretk/data/xmls/sample1.xml
+++ b/coretk/coretk/data/xmls/sample1.xml
@@ -266,11 +266,11 @@ router ospf6
     <configuration name="sdturl" value="tcp://127.0.0.1:50000/"/>
   </session_options>
   <session_metadata>
-    <configuration name="annotation a0" value="{iconcoords {612.0 492.0}} {type text} {label {wireless network}} {labelcolor black} {fontfamily {Arial}} {fontsize {12}} {effects {bold}} {canvas c1}"/>
-    <configuration name="annotation a1" value="{iconcoords {142.0 112.0 393.0 291.0}} {type rectangle} {label {}} {labelcolor black} {fontfamily {Arial}} {fontsize {12}} {color #ebebde} {width 1} {border #ffffff} {rad 25} {canvas c1}"/>
-    <configuration name="annotation a2" value="{iconcoords {492.0 384.0}} {type text} {label {gateway}} {labelcolor black} {fontfamily {Arial}} {fontsize {12}} {effects {bold}} {canvas c1}"/>
+    <configuration name="annotation a0" value='{"iconcoords": [612.0, 492.0], "type": "text", "label": "wireless network", "labelcolor": "black", "fontfamily": "Arial", "fontsize": 12, "effects": "bold", "canvas": "c1"}'/>
+    <configuration name="annotation a1" value='{"iconcoords": [142.0, 112.0, 393.0, 291.0], "type": "rectangle", "label": "", "labelcolor": "black", "fontfamily": "Arial", "fontsize": 12, "color": "#ebebde", "width": 1, "border": "#ffffff", "rad": 25, "canvas": "c1"}'/>
+    <configuration name="annotation a2" value='{"iconcoords": [492.0, 384.0], "type": "text", "label": "gateway", "labelcolor": "black", "fontfamily": "Arial", "fontsize": 12, "effects": "bold", "canvas": "c1"}'/>
     <configuration name="canvas" value='{"name": "Canvas1", "wallpaper-style": 1, "wallpaper": "sample1-bg.gif"}'/>
-    <configuration name="global_options" value="interface_names=no ip_addresses=yes ipv6_addresses=no node_labels=yes link_labels=yes show_api=no background_images=no annotations=yes grid=no traffic_start=0"/>
+    <configuration name="global_options" value='{"interface_names": false, "ip_addresses": true, "ipv6_addresses": false, "node_labels": true, "link_labels": true, "show_api": false, "background_images": false, "annotations": true, "grid": false, "traffic_start": false}'/>
   </session_metadata>
   <default_services>
     <node type="mdr">