Index
| Description | Defines an index that lists terms or topics along with references to their occurrences in the document, facilitating quick lookup. |
|---|---|
| Namespace | 1.7 |
| Category | grouping |
Attributes
Specifies how the element is placed relative to surrounding content (e.g., block-level or inline flow).
Defines the direction of text flow (e.g., left-to-right, right-to-left, or vertical).
Sets the background color for the element’s content area.
Specifies the color of the border around the element.
Indicates the style of the border (e.g., solid, dashed, dotted).
Defines the thickness of the border line in user space units (such as points).
Determines the space between the element’s border (or boundary) and its inner content.
Applies the primary color (fill or stroke) for the text or graphic content.
Main indicator of type. This semantic association allows tools to present and support interaction with the object in a manner that is consistent with user expectations about other objects of that type.
Differences
Well tagged PDF:
The 'Index' element in Well-Tagged PDF is used to represent an index that organizes key terms and topics for easy reference.
It should be structured logically within the document's structure tree, allowing for clear association between index terms and corresponding content locations.
PDFUA:
In PDF/UA, the 'Index' element helps users navigate documents by providing an accessible list of terms linked to relevant sections.
Indexes must be tagged with clear hierarchical relationships and include alternative text if necessary, ensuring assistive technologies can interpret the navigational structure.
Use cases
Index with a nested list as contents, giving more information about relationships
Try itIndex without alphabetical structure
Try itTag Relationships
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