The DTD provides a standardized description of the XML document structure.

<!ELEMENT shipper (organization, address, attention*)> 
<!ATTLIST shipper 
	DUNS CDATA #IMPLIED 
	NAICS CDATA #IMPLIED> 
<!ELEMENT organization (name, division*)> 
<!ELEMENT name (#PCDATA)> 
<!ELEMENT division (#PCDATA)> 
<!ELEMENT address (street+, city, state?, country, postalcode)> 
<!ELEMENT street (#PCDATA)> 
<!ELEMENT city (#PCDATA)> 
<!ELEMENT state (#PCDATA)> 
<!ELEMENT country (#PCDATA)> 
<!ELEMENT postalcode (#PCDATA)>