44 2 XML Semantics
<complexType>
<sequence>
<element ref=’t:MedlineID’/>
<element ref=’t:PMID’/>
<element ref=’t:DateCreated’/>
<element ref=’t:ArticleTitle’
minOccurs=’0’ maxOccurs=’1’/>
</sequence>
<attribute name=’Owner’ type=’string’
use=’default’ value=’NLM’/>
<attribute name=’Status’ use=’required’>
<simpleType>
<restriction base=’string’>
<enumeration value=’Incomplete’/>
<enumeration value=’Completed’/>
</restriction>
</simpleType>
</attribute>
</complexType>
</element><element name=’MedlineID’>
<complexType mixed=’true’>
</complexType>
</element><element name=’PMID’>
<complexType mixed=’true’>
</complexType>
</element><element name=’DateCreated’>
<complexType>
<sequence>
<element ref=’t:Year’/>
<element ref=’t:Month’/>
<element ref=’t:Day’/>
</sequence>
</complexType>