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<?xml version="1.0" encoding="UTF-8"?>
<!-- Example from XMLSchema recommendation 0 - primer at http://www.w3.org/TR/xmlschema-0/ -->
<!-- Converted from an XSD schema to a RelaxNG schema at http://debeissat.nicolas.free.fr/XSDtoRNG.php -->
<rng:grammar xmlns:rng="http://relaxng.org/ns/structure/1.0" ns=""
datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
<a:documentation xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0">
Purchase order schema for Example.com.
Copyright 2000 Example.com. All rights reserved.
</a:documentation>
<rng:start combine="choice">
<rng:ref name="purchaseOrder"/>
</rng:start>
<rng:define name="purchaseOrder">
<rng:element name="purchaseOrder">
<rng:ref name="PurchaseOrderType"/>
</rng:element>
</rng:define>
<rng:start combine="choice">
<rng:ref name="comment"/>
</rng:start>
<rng:define name="comment">
<rng:element name="comment">
<rng:data type="string"/>
</rng:element>
</rng:define>
<rng:define name="PurchaseOrderType">
<rng:element name="shipTo">
<rng:ref name="USAddress"/>
</rng:element>
<rng:element name="billTo">
<rng:ref name="USAddress"/>
</rng:element>
<rng:optional>
<rng:ref name="comment"/>
</rng:optional>
<rng:element name="items">
<rng:ref name="Items"/>
</rng:element>
<rng:optional>
<rng:attribute name="orderDate">
<rng:data type="date"/>
</rng:attribute>
</rng:optional>
</rng:define>
<rng:define name="USAddress">
<rng:element name="name">
<rng:data type="string"/>
</rng:element>
<rng:element name="street">
<rng:data type="string"/>
</rng:element>
<rng:element name="city">
<rng:data type="string"/>
</rng:element>
<rng:element name="state">
<rng:data type="string"/>
</rng:element>
<rng:element name="zip">
<rng:data type="decimal"/>
</rng:element>
<rng:optional>
<rng:attribute name="country">
<rng:data type="NMTOKEN"/>
</rng:attribute>
</rng:optional>
</rng:define>
<rng:define name="Items">
<rng:zeroOrMore>
<rng:element name="item">
<rng:element name="productName">
<rng:data type="string"/>
</rng:element>
<rng:element name="quantity">
<rng:data type="positiveInteger">
<rng:param name="maxExclusive">100</rng:param>
</rng:data>
</rng:element>
<rng:element name="USPrice">
<rng:data type="decimal"/>
</rng:element>
<rng:optional>
<rng:ref name="comment"/>
</rng:optional>
<rng:optional>
<rng:element name="shipDate">
<rng:data type="date"/>
</rng:element>
</rng:optional>
<rng:attribute name="partNum">
<rng:ref name="SKU"/>
</rng:attribute>
</rng:element>
</rng:zeroOrMore>
</rng:define>
<!-- Stock Keeping Unit, a code for identifying products -->
<rng:define name="SKU">
<rng:data type="string">
<rng:param name="pattern">\d{3}-[A-Z]{2}</rng:param>
</rng:data>
</rng:define>
</rng:grammar>
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