Structure Type |
Description |
---|---|
Figure |
(Figure) An item of graphical content. Its placement may be specified with the Placement layout attribute (see “General Layout Attributes” in 14.8.5.4, “Layout Attributes” ). |
Formula |
(Formula) A mathematical formula. This structure type is useful only for identifying an entire content element as a formula. No standard structure types are defined for identifying individual components within the formula. From a formatting standpoint, the formula shall be treated similarly to a figure (structure type Figure). |
Form |
(Form) A widget annotation representing an interactive form field (see 12.7, “Interactive Forms” ). If the element contains a Role attribute, it may contain content items that represent the value of the (non-interactive) form field. If the element omits a Role attribute (see Ta b l e 348 ), it shall have only one child: an object reference (see 14.7.4.3, “PDF Objects as Content Items” ) identifying the widget annotation. The annotations’ appearance stream (see 12.5.5, “Appearance Streams” ) shall describe the appearance of the form element. |