The attributes a.align include the attributes wsd and xml:base, wsd is used to indicate that the tag's content is encoded in the specified character set. The value of the attribute is the character set name (ISO-8859-1, etc.) which should be the same as that appearing on a <writingSystem> element in the header document which describes that character set. A single annotation document, containing a <cesHeader> element, followed by a <linkList> element. An XLink extended link specifying the XML elements in documents that have been aligned. Contains a series of links considered to be a group. In most cases, a group of links apply to data within a particular text division, paragraph, etc. This can be indicated using the domains attribute. Contains one or more occurrences of the element <linkGrp> An XLink locator that identifies the tokens, words, sentences, that have been aligned.