Structure Tree
Tagged PDF hierarchy that defines semantic structure like headings and lists.
Definition
Tagged PDF hierarchy that defines semantic structure like headings and lists.
Why it matters
Foundation for accessibility, reflow, and assistive reading.
Related PDFHQ workflows
Relevant to tagged-PDF and PDF/UA-aligned content workflows.
Related Knowledge
PDF/UA
PDF/UA is an accessibility-focused PDF profile aimed at usable documents for assistive technologies.
Tagged PDF
PDF containing semantic tags for structure and assistive reading.
Reading Order
Logical sequence assistive technologies use to read document content.