You define sections as part of the section group. The following example defines a zone section called heading for all text within the HTML < H1> tag:
begin
ctx_ddl.create_section_group('htmgroup', 'HTML_SECTION_GROUP');
ctx_ddl.add_zone_section('htmgroup', 'heading', 'H1');
end;
If you are using the AUTO_SECTION_GROUP or PATH_SECTION_GROUP to index an XML document collection, then you need not explicitly define sections. The system does this for you during indexing.
"Oracle Text Section Types" for more information about sections
"XML Section Searching with Oracle Text" for more information about section searching with XML