A headed group of material; the basic structural unit of a book component such as a chapter
A very short book component (e.g., a chapter) may contain nothing but paragraphs (and other paragraph-level elements such as figures and tables), but most book components are divided into sections, each with a title that describes the content of the section, such as “Introduction”.
Conversion Note: Sections are recursive, that is, various levels of sections are indicated by containment, not by different names for the subsections. A <sec> element may contain lower-level sections that are also tagged using the <sec> element, not tagged explicitly as <sec2>, <sec3>, <subsec1>, etc.
Conversion Note: The <sec> element can be used within <back> to tag material that has not been explicitly named as one of the other back matter components, that is, it is not named as an appendix, an acknowledgment, a glossary, etc. For example, tables are frequently placed in the back matter, with no other designation than a label such as “Table 6”, or a title such as “Epochs of Geologic Time”.
<!ELEMENT sec %sec-model; >
The following, in order:
<book> ... <book-front>...</book-front> <body> <book-part id="bid.1" book-part-type="part" book-part-number="Part 1"> <book-part-meta>...</book-part-meta> <body> <book-part id="bid.2" book-part-type="chapter" book-part-number="1"> <book-part-meta> <title-group> <title>GenBank: The Nucleotide Sequence Database</title> </title-group>... <abstract> <title>Summary</title> <p>The GenBank sequence database is an annotated collection ...</p> ... </abstract> </book-part-meta> <body> <sec id="bid.3"> <title>History</title> <p>Initially, GenBank was built and maintained at Los Alamos National Laboratory ...</p> </sec> ... </body> ... </book-part> ... </body> </book-part> ... </body> ... </book>