<xsd:element name="type" minOccurs="0" maxOccurs="1" nillable="true">
<xsd:annotation>
<xsd:documentation xml:lang="en">Defines the type of the entity. Polymer entities are expected to have corresponding ENTITY_POLY and associated entries. Non-polymer entities are expected to have corresponding CHEM_COMP and associated entries. Water entities are not expected to have corresponding entries in the ENTITY category.</xsd:documentation>
</xsd:annotation>
<xsd:simpleType>
<xsd:restriction base="xsd:string">
<xsd:enumeration value="polymer"/>
<xsd:enumeration value="non-polymer"/>
<xsd:enumeration value="macrolide"/>
<xsd:enumeration value="water"/>
</xsd:restriction>
</xsd:simpleType>
</xsd:element> |