<type>Attlist</type><name>corereq</name><comment>This is the list of the core attributes that all elements in the content part of the document must have. In elements using this attribute definition the refersTo attribute is optional but the eId attribute is required</comment>
<div><h3>id (as an attribute name)</h3><p>denotes an attribute whose value should be interpreted as if declared to be of type ID. This name is reserved by virtue of its definition in the xml:id specification.</p><p>See<a href="http://www.w3.org/TR/xml-id/">http://www.w3.org/TR/xml-id/</a>for information about this attribute.</p></div>
xml:lang
union of(xs:language, restriction of xs:string)
optional
<div><h3>lang (as an attribute name)</h3><p>denotes an attribute whose value is a language code for the natural language of the content of any element; its value is inherited. This name is reserved by virtue of its definition in the XML specification.</p></div><div><h4>Notes</h4><p>Attempting to install the relevant ISO 2- and 3-letter codes as the enumerated possible values is probably never going to be a realistic possibility.</p><p>See BCP 47 at<a href="http://www.rfc-editor.org/rfc/bcp/bcp47.txt">http://www.rfc-editor.org/rfc/bcp/bcp47.txt</a>and the IANA language subtag registry at<a href="http://www.iana.org/assignments/language-subtag-registry">http://www.iana.org/assignments/language-subtag-registry</a>for further information.</p><p>The union allows for the 'un-declaration' of xml:lang with the empty string.</p></div>
xml:space
restriction of xs:NCName
optional
<div><h3>space (as an attribute name)</h3><p>denotes an attribute whose value is a keyword indicating what whitespace processing discipline is intended for the content of the element; its value is inherited. This name is reserved by virtue of its definition in the XML specification.</p></div>
Source
<xsd:attributeGroup name="corereq"><xsd:annotation><xsd:documentation><type>Attlist</type><name>corereq</name><comment>This is the list of the core attributes that all elements in the content part of the document must have. In elements using this attribute definition the refersTo attribute is optional but the eId attribute is required</comment></xsd:documentation></xsd:annotation><xsd:attributeGroup ref="core"/><xsd:attributeGroup ref="HTMLattrs"/><xsd:attributeGroup ref="enactment"/><xsd:attributeGroup ref="idreq"/><xsd:attributeGroup ref="refers"/><xsd:attributeGroup ref="xmllang"/><xsd:attributeGroup ref="alt"/></xsd:attributeGroup>