NCBI element book-meta

Abstract	false (This can be used in an instance)
Nillable	false (Instance values cannot use xsi:nil)
Declared Namespaces	xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance xmlns:xlink=http://www.w3.org/1999/xlink xmlns:xs=http://www.w3.org/2001/XMLSchema xmlns:mml=http://www.w3.org/1998/Math/MathML

<xs:element name="book-meta">
    <xs:complexType>
        <xs:sequence>
            <xs:element maxOccurs="unbounded" ref="book-id"/>
            <xs:element ref="book-title-group"/>
            <xs:element minOccurs="0" ref="volume"/>
            <xs:element minOccurs="0" maxOccurs="unbounded" ref="volume-id"/>
            <xs:element minOccurs="0" ref="edition"/>
            <xs:element minOccurs="0" maxOccurs="unbounded" ref="series"/>
            <xs:choice minOccurs="0" maxOccurs="unbounded">
                <xs:element ref="contrib-group"/>
                <xs:element ref="aff"/>
                <xs:element ref="author-notes"/>
            </xs:choice>
            <xs:element minOccurs="0" maxOccurs="unbounded" ref="publisher"/>
            <xs:element minOccurs="0" maxOccurs="unbounded" ref="isbn"/>
            <xs:element minOccurs="0" maxOccurs="unbounded" ref="pub-date"/>
            <xs:element minOccurs="0" ref="history"/>
            <xs:element minOccurs="0" ref="copyright-statement"/>
            <xs:element minOccurs="0" ref="copyright-year"/>
            <xs:element minOccurs="0" ref="permissions"/>
            <xs:element minOccurs="0" maxOccurs="unbounded" ref="self-uri"/>
            <xs:element minOccurs="0" maxOccurs="unbounded" ref="alternate-form"/>
            <xs:element minOccurs="0" maxOccurs="unbounded" ref="abstract"/>
            <xs:element minOccurs="0" maxOccurs="unbounded" ref="trans-abstract"/>
            <xs:element minOccurs="0" maxOccurs="unbounded" ref="kwd-group"/>
            <xs:element minOccurs="0" ref="counts"/>
            <xs:choice minOccurs="0" maxOccurs="unbounded">
                <xs:element ref="email"/>
                <xs:element ref="ext-link"/>
                <xs:element ref="multi-link"/>
                <xs:element ref="uri"/>
                <xs:element ref="custom-meta-wrap"/>
                <xs:element ref="notes"/>
            </xs:choice>
        </xs:sequence>
    </xs:complexType>
</xs:element>

element {}book-meta

Source