What are PDF Tags?

Tags provide the underlying structure to the content of a PDF.

Screenshot of tags of a PDF document.

The "tags root" is the main level of the PDF document.

The tag structure is arranged vertically with content existing as "child elements" for each particular "tag element".

Tags (and the associated content) closest to the "tags root" will be communicated to assistive computer technology first.

In other words, content higher in the tags hierarchy will be read before content lower in the tags hierarchy.

 

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