![]() Imagine reading a newspaper with no headlines? How would you choose which story to read? You would be stuck reading entire paragraphs of text before you could decide if the article was something you were interested in. PDF Tags also provide efficient document navigation. PDF tags also allows the content to reflow seamlessly on devices with smaller screens, like smartphones and tablets. Some examples are –Paragraphs, Headings, Lists, Tables, Figures, etc.Īdding PDF tags does not change the visual appearance of the document it provides invisible layer of formatting within the document that works with screen readers. Each document will have different tags depending on its content. The tag tree is comprised of the different tag types used within the document. The tag tree forms the logical structure of the document (reading order). They also arrange the document content into a hierarchical architecture (or a “tag tree”). Each tag identifies the type of content and stores some attributes about it. When a tagged PDF is created, each page element in the document is “tagged”. PDF tags are the key to accessing a PDF document’s content with assistive technologies such as screen readers. Click to share on LinkedIn (Opens in new window).Click to share on Twitter (Opens in new window).Click to share on Facebook (Opens in new window).Link to a web page or to a place within the documentĪnnotations that are not a link or a widget (form field), like comments and videos. Refers to another place in the document, e.g. The footer/end-note character within Note and Reference will be placed in a Lbl. Used like BlockQuote for quoted content however, Quote is used at line levelįootnote or endnote text (not the reference character in the body text). Generic container without semantic meaning is used, among other things, for visual markups, language changes or for adding ActualText (e.g. Can be contained multiple times in a document, since it can also be used for image or table directories.īlock-level structure elements # Paragraph elements # Can be used either as a flat hierarchy (all contained TOCI on one level) or as a complex hierarchy ( TOC within a TOCI as a subgroup). Sect, Div, BlockQuote, Block-level structure elementsĬontainer for table of contents entries. One or more paragraphs that originate from another author, in other words, that have been quotedĪrt, Sect, Div, Caption, Block-level structure elementsĪ caption to describe for example a picture or a tableĭocument, Part, Art, Sect, Div, BlockQuote, Table, L Generic group element without semantic meaning Grouped related content parts, for example several paragraphs, which can be combined into a groupĭocument, Part, Art, Sect, Div, BlockQuote Sect, Div, BlockQuote, Caption, TOC, Index, Block-level structure elements Parts of content which together are conclusive, i.e. Grouping elements, Block-level structure elementsĭivision of a larger document into smaller, associated partsĪrt, Sect, Div, BlockQuote, Caption, TOC, Index, Block-level structure elements Possible and semantically meaningful child elements ![]() Possible and semantically meaningful parent elements Practical examples and further informations can be found in the document The illustrative elements can function as block or inline elements. The standard does not always clearly specify which constellations are possible. It is obvious that grouping elements basically contain block elements and block elements basically contain inline elements. Ruby, RB, RT, RP, Warichu, WT, WP (Inline-level structure element)īecause they are not recommended or not relevant for use.BibEntry (Inline-level structure element).Not included in the overview are the PDF tags Since the standard is not yet widely used and a revision of the PDF/UA standard is still open, this overview still corresponds to PDF 1.7. In this standard, some of the tags described here have been removed and new ones have been added. In 2018 the newer standard PDF 2.0 has been published. The tags listed below correspond to the ISO standard PDF 1.7. The reference helps you to choose the correct and semantic tags. This overview shows the most important tags from the PDF 1.7 standard. ![]()
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