Previous Next

                                                    902
         CHAPTER 10                                                         Document Interchange



         PDF consumer applications can recognize such fragmented BLSEs from the logi-
         cal structure and use this information to reassemble them and properly lay them
         out.

         Paragraphlike Elements

         Table 10.22 describes structure types for paragraphlike elements that consist of
         running text and other content laid out in the form of conventional paragraphs
         (as opposed to more specialized layouts such as lists and tables).

                  TABLE 10.22 Standard structure types for paragraphlike elements
STRUCTURE TYPE     DESCRIPTION

H                  (Heading) A label for a subdivision of a document’s content. It should be the first child of
                   the division that it heads.

H1–H6              Headings with specific levels, for use in applications that cannot hierarchically nest their
                   sections and thus cannot determine the level of a heading from its level of nesting.

P                  (Paragraph) A low-level division of text.


         List Elements

         The structure types described in Table 10.23 are used for organizing the content
         of lists. Section G.7, “Structured Elements That Describe Hierarchical Lists” pro-
         vides an example of nested list entries.

                         TABLE 10.23 Standard structure types for list elements
STRUCTURE TYPE     DESCRIPTION

L                  (List) A sequence of items of like meaning and importance. Its immediate children should
                   be an optional caption (structure type Caption; see “Grouping Elements” on page 899) fol-
                   lowed by one or more list items (structure type LI; see below).

LI                 (List item) An individual member of a list. Its children may be one or more labels, list bod-
                   ies, or both (structure types Lbl or LBody; see below).

Lbl                (Label) A name or number that distinguishes a given item from others in the same list or
                   other group of like items. In a dictionary list, for example, it contains the term being de-
                   fined; in a bulleted or numbered list, it contains the bullet character or the number of the
                   list item and associated punctuation.

Previous Next