NCBI element schema

Type Heirarchy
{http://www.w3.org/2001/XMLSchema}anyType (by restriction) {http://www.w3.org/2001/XMLSchema}openAttrs (by extension) {http://www.w3.org/2001/XMLSchema}schema

Abstract	false (This can be used in an instance)
Block Substitutions	extension, restriction, substitution
Nillable	false (Instance values cannot use xsi:nil)
Target Namespace	http://www.w3.org/2001/XMLSchema
Declared Namespaces	xmlns:hfp=http://www.w3.org/2001/XMLSchema-hasFacetAndProperty xmlns:xs=http://www.w3.org/2001/XMLSchema

<xs:element name="schema" id="schema">
    <xs:annotation>
        <xs:documentation source="http://www.w3.org/TR/xmlschema-1/#element-schema"/>
    </xs:annotation>
    <xs:complexType mixed="false">
        <xs:complexContent>
            <xs:extension base="xs:openAttrs">
                <xs:sequence>
                    <xs:choice minOccurs="0" maxOccurs="unbounded">
                        <xs:element ref="xs:include"/>
                        <xs:element ref="xs:import"/>
                        <xs:element ref="xs:redefine"/>
                        <xs:element ref="xs:annotation"/>
                    </xs:choice>
                    <xs:sequence minOccurs="0" maxOccurs="unbounded">
                        <xs:group ref="xs:schemaTop"/>
                        <xs:element ref="xs:annotation" minOccurs="0" maxOccurs="unbounded"/>
                    </xs:sequence>
                </xs:sequence>
                <xs:attribute name="targetNamespace" type="xs:anyURI"/>
                <xs:attribute name="version" type="xs:token"/>
                <xs:attribute name="finalDefault" type="xs:fullDerivationSet" use="optional"
                    default=""/>
                <xs:attribute name="blockDefault" type="xs:blockSet" use="optional" default=""/>
                <xs:attribute name="attributeFormDefault" type="xs:formChoice" use="optional"
                    default="unqualified"/>
                <xs:attribute name="elementFormDefault" type="xs:formChoice" use="optional"
                    default="unqualified"/>
                <xs:attribute name="id" type="xs:ID"/>
                <xs:attribute ref="xml:lang"/>
            </xs:extension>
        </xs:complexContent>
    </xs:complexType>
    <xs:key name="element">
        <xs:selector xpath="xs:element"/>
        <xs:field xpath="@name"/>
    </xs:key>
    <xs:key name="attribute">
        <xs:selector xpath="xs:attribute"/>
        <xs:field xpath="@name"/>
    </xs:key>
    <xs:key name="type">
        <xs:selector xpath="xs:complexType|xs:simpleType"/>
        <xs:field xpath="@name"/>
    </xs:key>
    <xs:key name="group">
        <xs:selector xpath="xs:group"/>
        <xs:field xpath="@name"/>
    </xs:key>
    <xs:key name="attributeGroup">
        <xs:selector xpath="xs:attributeGroup"/>
        <xs:field xpath="@name"/>
    </xs:key>
    <xs:key name="notation">
        <xs:selector xpath="xs:notation"/>
        <xs:field xpath="@name"/>
    </xs:key>
    <xs:key name="identityConstraint">
        <xs:selector xpath=".//xs:key|.//xs:unique|.//xs:keyref"/>
        <xs:field xpath="@name"/>
    </xs:key>
</xs:element>

element {http://www.w3.org/2001/XMLSchema}schema

Source

Documentation