<\body> The provides the standard tags for sections, which are the same as in . Most sectional tags take one argument: the name of the section. The intention of the following tags is to produce numbered sections: <\explain> , , , , <|explain> The intention of these macros is to produce a numbered title for a part ( chapter, section, subsection, ). The numbering is not required, but merely an intention: the and tags are usually not numbered and some styles may not produce numbers at all. The tags , , , , , , and can be used for producing the unnumbered variants of the above tags. By default, all sectional only produce the section title. When using the experimental package , all sectional tags are enriched, so that they take the body of the section as an optional argument. Moreover, an additional tag is provided in order to produce recursively embedded sections. For instance, an inside a behaves like a . In the future, all list items should become structured. The also provides the following sectional environments with automatically generated content <\explain|> This macro is used for producing bibliographies. The first argument specifies the auxiliary channel with the data for generating the bibliography (, by default). The arguments and contain the bibliography style and the file with the bibliographic database. The argument corresponds to the automatically generated content. <\explain|> This macro is used for producing tables of contents. The first argument specifies the auxiliary channel with the data for generating the bibliography (, by default). The argument corresponds to the automatically generated content. <\explain|> Similar to but for indices and default channel . <\explain> <|explain> Similar to but for glossaries (default channel ), lists of figures (default channel ) and lists of tables (default channel ). The above tags also admit the variants , , and with an additional argument before , which specifies the name of the section. For instance, the was formerly used for lists of figures and lists of tables. <\initial> <\collection>