<\body> The provides tags for title information. The following high-level tags can only be used when encapsulated inside a tag: <\explain|> Specify a title for the document. <\explain|> Specify one or several authors for the document. <\explain|> Specify the address of the author. <\explain|> Specify an address of an author (in case of multiple addresses). <\explain|> Specify the email address of the author. <\explain|> Specify the creation date of the article. The and use the and tags for specifying the running title and header. You may override these by reusing . The above tags also depend on the following low-level tags for their physical layout: <\explain|> Macro with one argument which specifies the physical layout of titles. <\explain|> Macro with one argument which specifies the physical layout of authors. <\explain|> Macro with one argument which specifies the physical layout of addresses. <\explain|> Macro with one argument which specifies the physical layout of email addresses. <\explain|> Macro with one argument which specifies the physical layout of creation dates. The also defines the tag for abstracts of documents. <\initial> <\collection>