xces:a.global 

Global attributes. Most elements contain these attributes

Attribute Group Information

Attributes

QName Type Fixed Default Use Inheritable Annotation
TEIform xs:string optional
id xs:ID optional
lang xs:IDREF optional
n xs:string optional
xml:lang union of(xs:language, restriction of xs:string) optional 
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.  See
         RFC 3066 at http://www.ietf.org/rfc/rfc3066.txt and the IANA registry
         at http://www.iana.org/assignments/lang-tag-apps.htm for
         further information.

         The union allows for the 'un-declaration' of xml:lang with
         the empty string.

Used By

Complex Types xces:class.global, xces:class.global.mixed

Source 

<xs:attributeGroup name="a.global">
  <xs:annotation>
    <xs:documentation xml:lang="en">Global attributes. Most elements contain these attributes</xs:documentation>
  </xs:annotation>
  <xs:attribute name="id" type="xs:ID"/>
  <xs:attribute name="n" type="xs:string"/>
  <xs:attribute name="lang" type="xs:IDREF"/>
  <xs:attribute ref="xml:lang"/>
  <xs:attribute name="TEIform" type="xs:string"/>
</xs:attributeGroup>