diff --git a/debian/var/models/example.xmls b/debian/var/models/example.xmls
new file mode 100644
index 0000000..3d17c89
--- /dev/null
+++ b/debian/var/models/example.xmls
@@ -0,0 +1,184 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
+<!-- https://www.freeformatter.com/xml-validator-xsd.html -->
+<!-- https://www.w3schools.com/xml/el_attribute.asp  -->
+<xs:attribute name="id" type="xs:string"/>
+<xs:attribute name="date" type="xs:integer"/>
+<xs:attribute name="name" type="xs:string"/>
+<xs:attribute name="lang" type="xs:string"/>
+<xs:attribute name="owner" type="xs:string"/>
+<xs:attribute name="owner_id" type="xs:integer"/>
+<xs:attribute name="author" type="xs:string"/>
+<xs:attribute name="version" type="xs:float"/>
+<xs:attribute name="sequence" type="xs:integer"/>
+<xs:attribute name="probability" type="xs:integer"/>
+<xs:attribute name="parent" type="xs:string"/>
+
+
+<xs:attributeGroup name="id_date_author">
+      <xs:attribute ref="id"/>
+      <xs:attribute ref="date"/>
+      <xs:attribute ref="author"/>
+</xs:attributeGroup>
+
+<xs:element name="ref">
+    <xs:complexType>
+        <xs:simpleContent>
+            <xs:extension base="xs:string">
+              <xs:attributeGroup ref="id_date_author"/>
+              <xs:attribute ref="lang" use="required"/>
+            </xs:extension>
+        </xs:simpleContent>
+    </xs:complexType>
+</xs:element>
+
+<xs:element name="quote" substitutionGroup="ref"/>
+
+<xs:element name="arrow">
+    <xs:complexType>
+        <xs:sequence>
+            <xs:element minOccurs="0" ref="quote"/>
+        </xs:sequence>
+        <xs:attribute name="x" type="xs:integer" default="1"/>
+        <xs:attribute name="y" type="xs:integer" default="0"/>
+        <xs:attribute name="z" type="xs:integer" default="0"/>
+        <xs:attribute name="site" type="xs:integer" default="1"/>
+        <xs:attribute name="weight" type="xs:integer" default="0"/>
+    </xs:complexType>
+</xs:element>
+
+<xs:element name="state">
+    <xs:complexType>
+    <xs:sequence minOccurs="1" maxOccurs="unbounded">
+        <xs:element ref="arrow"/>
+    </xs:sequence>
+    <xs:attributeGroup ref="id_date_author"/>
+    </xs:complexType>
+</xs:element>
+
+<xs:element name="object" substitutionGroup="state"/>
+
+<xs:element name="space">
+    <xs:complexType>
+    <xs:sequence minOccurs="1" maxOccurs="unbounded">
+        <xs:element ref="arrow"/>
+    </xs:sequence>
+    <xs:attributeGroup ref="id_date_author"/>
+    <xs:attribute ref="sequence" use="required"/>
+    </xs:complexType>
+</xs:element>
+
+<xs:element name="if">
+    <xs:complexType>
+    <xs:sequence minOccurs="0" maxOccurs="unbounded">
+        <xs:element minOccurs="0" ref="quote"/>
+        <xs:element ref="arrow"/>
+    </xs:sequence>
+    </xs:complexType>
+</xs:element>
+
+<xs:element name="then">
+    <xs:complexType>
+    <xs:sequence minOccurs="0" maxOccurs="unbounded">
+        <xs:element minOccurs="0" ref="quote"/>
+        <xs:element ref="arrow"/>
+    </xs:sequence>
+    </xs:complexType>
+</xs:element>
+
+<xs:element name="transition">
+    <xs:complexType>
+        <xs:sequence minOccurs="1" maxOccurs="1">
+            <xs:element minOccurs="0" ref="quote"/>
+            <xs:element ref="if"/>
+            <xs:element ref="then"/>
+        </xs:sequence>
+        <xs:attributeGroup ref="id_date_author"/>
+        <xs:attribute ref="parent" use="required"/>
+        <xs:attribute ref="probability" use="required"/>
+    </xs:complexType>
+</xs:element>
+
+<xs:element name="gem-graph-model">
+<xs:complexType>
+<xs:sequence>
+    <xs:element name="identity">
+        <xs:complexType>
+          <xs:sequence>
+              <xs:element name="name" type="xs:string"/>
+              <xs:element name="owner" type="xs:string"/>
+              <xs:element name="owner_id" type="xs:integer"/>
+              <xs:element name="date" type="xs:integer"/>
+              <xs:element name="version" type="xs:float"/>
+              <xs:element minOccurs="0" ref="ref"/>
+          </xs:sequence>
+        </xs:complexType>
+    </xs:element>
+
+        <xs:element name="parameters">
+        <xs:complexType>
+        <xs:sequence>
+
+            <xs:element name="simulation">
+                <xs:complexType>
+                <xs:sequence>
+
+                    <xs:element name="max_thread"/>
+
+                    <xs:element name="max_cycles"/>
+
+                </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+
+            <xs:element name="space-param">
+                <xs:complexType>
+                <xs:sequence>
+
+                    <xs:element name="dimension"/>
+
+                    <xs:element name="size"/>
+
+                    <xs:element name="site_multiplicity"/>
+
+              </xs:sequence>
+              </xs:complexType>
+          </xs:element>
+
+          </xs:sequence>
+          <xs:attributeGroup ref="id_date_author"/>
+          </xs:complexType>
+      </xs:element>
+
+      <xs:element name="objects">
+          <xs:complexType>
+          <xs:sequence minOccurs="1" maxOccurs="unbounded">
+              <xs:element ref="state"/>
+          </xs:sequence>
+          <xs:attributeGroup ref="id_date_author"/>
+          </xs:complexType>
+      </xs:element>
+
+      <xs:element name="savestates">
+          <xs:complexType>
+          <xs:sequence minOccurs="0" maxOccurs="unbounded">
+              <xs:element ref="space"/>
+          </xs:sequence>
+          <xs:attributeGroup ref="id_date_author"/>
+          </xs:complexType>
+      </xs:element>
+
+      <xs:element name="transitions">
+          <xs:complexType>
+          <xs:sequence minOccurs="0" maxOccurs="unbounded">
+              <xs:element ref="transition"/>
+          </xs:sequence>
+          <xs:attributeGroup ref="id_date_author"/>
+          </xs:complexType>
+      </xs:element>
+
+</xs:sequence>
+<xs:attribute ref="version" use="required"/>
+</xs:complexType>
+</xs:element>
+</xs:schema>