<xs:attribute name="level">
<xs:annotation>
<xs:documentation>Indicates the bibliographic level for a title.</xs:documentation>
</xs:annotation>
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:enumeration value="a">
<xs:annotation>
<xs:documentation>Analyzed component, such as an article or chapter, within a larger bibliographic entity.</xs:documentation>
</xs:annotation>
</xs:enumeration>
<xs:enumeration value="m">
<xs:annotation>
<xs:documentation>Monograph.</xs:documentation>
</xs:annotation>
</xs:enumeration>
<xs:enumeration value="j">
<xs:annotation>
<xs:documentation>Journal.</xs:documentation>
</xs:annotation>
</xs:enumeration>
<xs:enumeration value="s">
<xs:annotation>
<xs:documentation>Series.</xs:documentation>
</xs:annotation>
</xs:enumeration>
<xs:enumeration value="u">
<xs:annotation>
<xs:documentation>Unpublished (including theses and dissertations unless published by a commercial press).</xs:documentation>
</xs:annotation>
</xs:enumeration>
</xs:restriction>
</xs:simpleType>
</xs:attribute> |