diff --git a/xml/chip.xsd b/xml/chip.xsd
new file mode 100644
index 0000000..5842651
--- /dev/null
+++ b/xml/chip.xsd
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
+            elementFormDefault="unqualified">
+
+<!-- Root element: chip -->
+<xsd:element name="chip">
+    <xsd:complexType>
+        <xsd:sequence>
+            <xsd:element name="attn_tree" type="attn_tree"
+                         minOccurs="1" maxOccurs="255"/>
+        </xsd:sequence>
+        <xsd:attribute name="name"     type="name_type"     use="required"/>
+        <xsd:attribute name="model_ec" type="model_ec_type" use="required"/>
+    </xsd:complexType>
+</xsd:element>
+
+<!-- Element: chip/attn_tree -->
+<xsd:complexType name="attn_tree">
+    <xsd:attribute name="attn_type" type="attn_type_enum" use="required"/>
+    <xsd:attribute name="root_node" type="name_type"      use="required"/>
+    <xsd:attribute name="node_inst" type="inst_type"      use="required"/>
+</xsd:complexType>
+
+<!-- Names must be alphanumeric or underscores, no spaces or other symbols
+     allowed. -->
+<xsd:simpleType name="name_type">
+    <xsd:restriction base="xsd:string">
+        <xsd:pattern value="[a-zA-Z0-9_]+"/>
+    </xsd:restriction>
+</xsd:simpleType>
+
+<!-- A comma separated list of names (see name_type for name definition). -->
+<xsd:simpleType name="model_ec_type">
+    <xsd:restriction base="xsd:string">
+        <xsd:pattern value="[a-zA-Z0-9_]+(,[a-zA-Z0-9_]+)*"/>
+    </xsd:restriction>
+</xsd:simpleType>
+
+<!-- Instance values are integers from 0-255. -->
+<xsd:simpleType name="inst_type">
+    <xsd:restriction base="xsd:integer">
+        <xsd:minInclusive value="0"/>
+        <xsd:maxInclusive value="255"/>
+    </xsd:restriction>
+</xsd:simpleType>
+
+<!-- Attention type enum. -->
+<xsd:simpleType name="attn_type_enum">
+    <xsd:restriction base="xsd:string">
+        <xsd:enumeration value="CS"/>
+        <xsd:enumeration value="RE"/>
+        <xsd:enumeration value="UCS"/>
+        <xsd:enumeration value="SPA"/>
+        <xsd:enumeration value="HA"/>
+    </xsd:restriction>
+</xsd:simpleType>
+
+</xsd:schema>