diff --git a/ER-rar-index.graphml b/ER-rar-index.graphml
new file mode 100644
index 0000000..4c709f3
--- /dev/null
+++ b/ER-rar-index.graphml
@@ -0,0 +1,222 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!--Created by yFiles for HTML 2.6.0.1-->
+<graphml xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns http://www.yworks.com/xml/schema/graphml.html/2.0/ygraphml.xsd " xmlns="http://graphml.graphdrawing.org/xmlns" xmlns:demostyle2="http://www.yworks.com/yFilesHTML/demos/FlatDemoStyle/2.0" xmlns:demostyle="http://www.yworks.com/yFilesHTML/demos/FlatDemoStyle/1.0" xmlns:icon-style="http://www.yworks.com/yed-live/icon-style/1.0" xmlns:bpmn="http://www.yworks.com/xml/yfiles-bpmn/2.0" xmlns:demotablestyle="http://www.yworks.com/yFilesHTML/demos/FlatDemoTableStyle/1.0" xmlns:uml="http://www.yworks.com/yFilesHTML/demos/UMLDemoStyle/1.0" xmlns:GraphvizNodeStyle="http://www.yworks.com/yFilesHTML/graphviz-node-style/1.0" xmlns:VuejsNodeStyle="http://www.yworks.com/demos/yfiles-vuejs-node-style/1.0" xmlns:explorer-style="http://www.yworks.com/data-explorer/1.0" xmlns:y="http://www.yworks.com/xml/yfiles-common/3.0" xmlns:x="http://www.yworks.com/xml/yfiles-common/markup/3.0" xmlns:x0="http://www.yworks.com/yFilesHTML/demos/EntityRelationship/1.0" xmlns:sys="http://www.yworks.com/xml/yfiles-common/markup/primitives/2.0" xmlns:yjs="http://www.yworks.com/xml/yfiles-for-html/2.0/xaml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
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+	<key id="d3" for="node" attr.type="string" attr.name="description"/>
+	<key id="d4" for="node" attr.name="NodeLabels" y:attr.uri="http://www.yworks.com/xml/yfiles-common/2.0/NodeLabels"/>
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+	<key id="d6" for="all" attr.name="UserTags" y:attr.uri="http://www.yworks.com/xml/yfiles-common/2.0/UserTags"/>
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+	<key id="d8" for="node" attr.name="NodeViewState" y:attr.uri="http://www.yworks.com/xml/yfiles-common/2.0/folding/1.1/NodeViewState"/>
+	<key id="d9" for="edge" attr.type="string" attr.name="url"/>
+	<key id="d10" for="edge" attr.type="string" attr.name="description"/>
+	<key id="d11" for="edge" attr.name="EdgeLabels" y:attr.uri="http://www.yworks.com/xml/yfiles-common/2.0/EdgeLabels"/>
+	<key id="d12" for="edge" attr.name="EdgeGeometry" y:attr.uri="http://www.yworks.com/xml/yfiles-common/2.0/EdgeGeometry"/>
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+	<key id="d16" for="port" attr.name="PortLocationParameter" y:attr.uri="http://www.yworks.com/xml/yfiles-common/2.0/PortLocationParameter">
+		<default>
+			<x:Static Member="y:FreeNodePortLocationModel.NodeCenterAnchored"/>
+		</default>
+	</key>
+	<key id="d17" for="port" attr.name="PortStyle" y:attr.uri="http://www.yworks.com/xml/yfiles-common/2.0/PortStyle">
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+		<y:SharedData>
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+			<yjs:SolidColorFill x:Key="2" color="#FFB7C9E3"/>
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+	</data>
+	<graph id="G" edgedefault="directed">
+		<data key="d6">
+			<y:Json>{"version":"2.0.0","origin":"yed-live","theme":{"name":"light","version":"1.0.0"}}</y:Json>
+		</data>
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+			<data key="d7">
+				<x0:EntityNodeStyle fill="{y:GraphMLReference 1}" insetFill="{y:GraphMLReference 2}" stroke="BLACK">
+					<x0:EntityNodeStyle.model>
+						<x0:EntityRelationshipModel>
+							<x0:EntityRelationshipModel.title>Archs</x0:EntityRelationshipModel.title>
+							<x0:EntityRelationshipModel.attributes>
+								<x:Array Type="sys:Object">
+									<sys:String>ID</sys:String>
+									<sys:String>NAME</sys:String>
+									<sys:String>HASH</sys:String>
+									<sys:String>IMPORTED</sys:String>
+									<sys:String>CATEGORY</sys:String>
+									<sys:String>OWNER</sys:String>
+									<sys:String></sys:String>
+								</x:Array>
+							</x0:EntityRelationshipModel.attributes>
+						</x0:EntityRelationshipModel>
+					</x0:EntityNodeStyle.model>
+				</x0:EntityNodeStyle>
+			</data>
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+				</data>
+			</port>
+			<port name="p1">
+				<data key="d16">
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+			</port>
+			<port name="p2">
+				<data key="d16">
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+			</port>
+		</node>
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+			<data key="d5">
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+			</data>
+			<data key="d7">
+				<x0:EntityNodeStyle fill="{y:GraphMLReference 1}" insetFill="{y:GraphMLReference 2}" stroke="BLACK">
+					<x0:EntityNodeStyle.model>
+						<x0:EntityRelationshipModel>
+							<x0:EntityRelationshipModel.title>Cats</x0:EntityRelationshipModel.title>
+							<x0:EntityRelationshipModel.attributes>
+								<x:Array Type="sys:Object">
+									<sys:String>ID</sys:String>
+									<sys:String>NAME</sys:String>
+									<sys:String>PARENT</sys:String>
+								</x:Array>
+							</x0:EntityRelationshipModel.attributes>
+						</x0:EntityRelationshipModel>
+					</x0:EntityNodeStyle.model>
+				</x0:EntityNodeStyle>
+			</data>
+			<port name="p0">
+				<data key="d16">
+					<y:FreeNodePortLocationModelParameter Ratio="0.5,0.007575757575757569"/>
+				</data>
+			</port>
+		</node>
+		<node id="n2">
+			<data key="d0">3</data>
+			<data key="d5">
+				<y:RectD X="210.5" Y="-250" Width="130" Height="130"/>
+			</data>
+			<data key="d7">
+				<x0:EntityNodeStyle fill="{y:GraphMLReference 1}" insetFill="{y:GraphMLReference 2}" stroke="BLACK">
+					<x0:EntityNodeStyle.model>
+						<x0:EntityRelationshipModel>
+							<x0:EntityRelationshipModel.title>Labs</x0:EntityRelationshipModel.title>
+							<x0:EntityRelationshipModel.attributes>
+								<x:Array Type="sys:Object">
+									<sys:String>ID</sys:String>
+									<sys:String>NAME</sys:String>
+									<sys:String>CATEGORY</sys:String>
+									<sys:String>TYPE</sys:String>
+								</x:Array>
+							</x0:EntityRelationshipModel.attributes>
+						</x0:EntityRelationshipModel>
+					</x0:EntityNodeStyle.model>
+				</x0:EntityNodeStyle>
+			</data>
+			<port name="p0">
+				<data key="d16">
+					<y:FreeNodePortLocationModelParameter Ratio="0.007575757575757569,0.5"/>
+				</data>
+			</port>
+		</node>
+		<node id="n3">
+			<data key="d0">4</data>
+			<data key="d5">
+				<y:RectD X="-27.5" Y="-250" Width="130" Height="130"/>
+			</data>
+			<data key="d7">
+				<x0:EntityNodeStyle fill="#FFCEDED3" insetFill="#FFB7E3C5" stroke="BLACK">
+					<x0:EntityNodeStyle.model>
+						<x0:EntityRelationshipModel>
+							<x0:EntityRelationshipModel.title>ArchLab</x0:EntityRelationshipModel.title>
+							<x0:EntityRelationshipModel.attributes>
+								<x:Array Type="sys:Object">
+									<sys:String>ID</sys:String>
+									<sys:String>ARCH</sys:String>
+									<sys:String>CAT</sys:String>
+								</x:Array>
+							</x0:EntityRelationshipModel.attributes>
+						</x0:EntityRelationshipModel>
+					</x0:EntityNodeStyle.model>
+				</x0:EntityNodeStyle>
+			</data>
+			<data key="d8">
+				<y:ViewState>
+					<y:FolderNodeState x:Key="c|view" Layout="-27.5,-250,130,130"/>
+				</y:ViewState>
+			</data>
+		</node>
+		<node id="n4">
+			<data key="d0">6</data>
+			<data key="d5">
+				<y:RectD X="-268.5" Y="-453" Width="130" Height="130"/>
+			</data>
+			<data key="d7">
+				<x0:EntityNodeStyle fill="{y:GraphMLReference 1}" insetFill="{y:GraphMLReference 2}" stroke="BLACK">
+					<x0:EntityNodeStyle.model>
+						<x0:EntityRelationshipModel>
+							<x0:EntityRelationshipModel.title>Users</x0:EntityRelationshipModel.title>
+							<x0:EntityRelationshipModel.attributes>
+								<x:Array Type="sys:Object">
+									<sys:String>ID</sys:String>
+									<sys:String>UNAME</sys:String>
+									<sys:String>DNAME</sys:String>
+									<sys:String>CREATED</sys:String>
+									<sys:String>STATE</sys:String>
+									<sys:String>PASSHASH</sys:String>
+								</x:Array>
+							</x0:EntityRelationshipModel.attributes>
+						</x0:EntityRelationshipModel>
+					</x0:EntityNodeStyle.model>
+				</x0:EntityNodeStyle>
+			</data>
+			<port name="p0">
+				<data key="d16">
+					<y:FreeNodePortLocationModelParameter Ratio="0.5,0.9924242424242424"/>
+				</data>
+			</port>
+		</node>
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+			<data key="d13">
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+					<yjs:PolylineEdgeStyle.sourceArrow>
+						<yjs:Arrow type="TRIANGLE" scale="0.75" stroke="#FF663800" fill="{y:GraphMLReference 3}" cropLength="1"/>
+					</yjs:PolylineEdgeStyle.sourceArrow>
+				</yjs:PolylineEdgeStyle>
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\ No newline at end of file